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Land Rover Rover 214 Repair 1689 09 Rover Manual

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    							1689 Rover 214 & 414 Updated Version 09/97
    9
    Chapter 9
    Braking system
    Anti-lock Braking System (ABS) - component removal and refitting  . . 26
    Brake pedal - removal and refitting  . . . . . . . . . . . . . . . . . . . . . . . . . . 2
    Front brake caliper - removal, overhaul and refitting  . . . . . . . . . . . . 12
    Front brake disc - inspection, removal and refitting  . . . . . . . . . . . . . 13
    Front brake pads - inspection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
    Front brake pads - renewal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
    General information and precautions  . . . . . . . . . . . . . . . . . . . . . . . . 1
    Handbrake cables - removal and refitting  . . . . . . . . . . . . . . . . . . . . . 24
    Handbrake lever - removal and refitting  . . . . . . . . . . . . . . . . . . . . . . 23
    Hydraulic fluid - level check and renewal  . . . . . . . . . . . . . . . . . . . . . 5
    Hydraulic pipes and hoses - inspection  . . . . . . . . . . . . . . . . . . . . . . 7
    Hydraulic pipes and hoses - renewal  . . . . . . . . . . . . . . . . . . . . . . . . 8
    Hydraulic system - bleeding  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Master cylinder - removal, overhaul and refitting  . . . . . . . . . . . . . . . 9
    Pressure regulating valve - testing, removal and refitting  . . . . . . . . . 14
    Rear brake caliper - removal, overhaul and refitting  . . . . . . . . . . . . . 21
    Rear brake disc - inspection, removal and refitting  . . . . . . . . . . . . . 22
    Rear brake drum - removal, inspection and refitting . . . . . . . . . . . . . 17
    Rear brake pads - inspection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
    Rear brake pads - renewal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
    Rear brake shoes - inspection  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
    Rear brake shoes - renewal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
    Rear wheel cylinder - removal, overhaul and refitting  . . . . . . . . . . . . 18
    Stop lamp switch - removal, refitting and adjustment  . . . . . . . . . . . 25
    Vacuum servo unit - testing, removal and refitting  . . . . . . . . . . . . . . 3
    Vacuum servo unit check valve - removal, testing and refitting  . . . . 4
    9•1
    Contents
    Specifications
    Brake system
    Type  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dual hydraulic circuit, split diagonally on models without ABS and
    front to rear on models with ABS. Disc front brakes. Drum rear brakes
    except on models with ABS which have rear disc brakes. Vacuum
    servo-assistance on all models. Cable-operated handbrake on rear
    brakes
    Front brakes
    Type  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc, with single piston sliding caliper
    Disc diameter:
    Non-ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 mm
    ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 mm
    Disc thickness:
    New:
    Non-ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.80 mm
    ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21.60 mm
    Minimum thickness after machining:
    Non-ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.70 mm
    ABS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.00 mm
    Maximum disc run-out  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.02 mm
    Brake pad friction material minimum thickness  . . . . . . . . . . . . . . . . . . . 3.0 mm
    Easy,suitable for
    novice with little
    experienceFairly easy,suitable
    for beginner with
    some experienceFairly difficult,
    suitable for competent
    DIY mechanic
    Difficult,suitable for
    experienced  DIY
    mechanicVery difficult,
    suitable for expert DIY
    or  professional
    Degrees of difficulty
    54321 
    						
    							Rear brakes
    Non-ABS
    Type  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single leading shoe drum
    Drum diameter:
    New  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mm
    Maximum diameter after machining  . . . . . . . . . . . . . . . . . . . . . . . . . . 204 mm
    Maximum drum ovality  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.012 mm
    Brake shoe friction material minimum thickness  . . . . . . . . . . . . . . . . . . 2.0 mm
    ABS
    Type  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disc, with single piston sliding caliper
    Disc diameter  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239 mm
    Disc thickness:
    New  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mm
    Minimum thickness after machining  . . . . . . . . . . . . . . . . . . . . . . . . . . 8 mm
    Maximum disc run-out  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06 mm
    Brake pad friction material minimum thickness  . . . . . . . . . . . . . . . . . . . 3.0 mm
    Torque wrench settingsNm lbf ft
    Servo vacuum hose-to-inlet manifold union bolt  . . . . . . . . . . . . . . . . . . 50 37
    Brake hose union bolt  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 28
    Master cylinder-to-servo unit nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 13
    Master cylinder brake pipe union nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . 24 18
    Brake caliper guide pin bolt  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 24
    Brake disc retaining screws  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9
    Front brake caliper bracket-to-hub bolts  . . . . . . . . . . . . . . . . . . . . . . . . 81 60
    Pressure regulating valve union nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 10
    Rear brake drum retaining screws  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
    Rear wheel cylinder-to-backplate bolts  . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
    Rear brake caliper bracket-to-trailing arm bolts . . . . . . . . . . . . . . . . . . . 40 30
    Handbrake cable-to-underbody retaining bolts  . . . . . . . . . . . . . . . . . . . 22 16
    ABS modulator mounting nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5
    ABS modulator brake pipe union nuts:
    Upper union nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 11
    Lower union nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 18
    ABS front wheel sensor retaining bolts  . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
    ABS rear wheel sensor retaining bolts  . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
    ABS wheel sensor wiring bracket bolts  . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
    ABS rear wheel sensor cover and cover strap bolts  . . . . . . . . . . . . . . . 10 7
    Roadwheel nuts  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 74
    9•2 Braking system
    1689 Rover 214 & 414 Updated Version 09/97 1.0a  Non-ABS braking system component layout
    1 Primary hydraulic circuit
    2 Secondary hydraulic circuit
    3 Brake pipe - pressure
    regulating valve to right-hand
    front hose
    4 Brake pipe - pressure
    regulating valve to left-hand
    front hose
    5 Brake pipe - pressure
    regulating valve to right-hand
    rear hose
    6 Brake pipe - pressure
    regulating valve to left-hand
    rear hose
    7 Brake pipe - hose to rear wheel
    cylinder
    8 Brake flexible hose - brake pipe
    to front brake caliper
    9 Brake flexible hose - rear wheel
    10 Handbrake cable
    11 Pressure regulating valve 
    						
    							1 General information and
    precautions
    General information
    The braking system is of the servo-
    assisted, dual circuit hydraulic type. The
    arrangement of the hydraulic system is such
    that each circuit operates one front and one
    rear brake from a tandem master cylinder.
    Under normal circumstances both circuits
    operate in unison. However, in the event of
    hydraulic failure in one circuit, full braking
    force will still be available at two wheels (see
    illustrations).
    On models not equipped with an Anti-lock
    Braking System (ABS), a pressure regulating
    valve is also incorporated in the hydraulic
    circuit to regulate the pressure applied to the
    rear brakes and reduce the possibility of 
    the rear wheels locking under heavy braking.
    On models equipped with ABS, the pressure
    regulating valve is fitted is but it is non-
    operational.
    All models are fitted with front disc brakes.
    Models equipped with ABS are fitted with
    ventilated discs, whereas non-ABS models
    are fitted with solid discs. The disc brakes are
    actuated by single piston sliding type calipers
    which ensure that equal pressure is applied to
    each disc pad.
    Non-ABS models are fitted with rear drum
    brakes, incorporating leading and trailing
    shoes which are actuated by twin piston
    wheel cylinders. A self-adjust mechanism is
    incorporated to automatically compensate for
    brake shoe wear. As the brake shoe liningswear, the footbrake operation automatically
    operates the adjuster mechanism quadrant
    which effectively lengthens the shoe strut and
    repositions the brake shoes to remove the
    lining-to-drum clearance.
    ABS models are equipped with rear disc
    brakes. The disc brakes are actuated by a
    single piston sliding caliper which
    incorporates a mechanical handbrake
    mechanism.
    On all models, the handbrake provides an
    independent mechanical means of rear brake
    application. Full details of ABS system
    operation are as follows.
    Anti-lock Braking System (ABS) -
    operation
    ABS is available as an option on all models
    covered in this Manual. The system
    comprises a modulator block which contains
    an ABS Electronic Control Unit (ECU),
    hydraulic solenoid valves and accumulators,
    and an electrically-driven return pump. One
    sensor is fitted to each roadwheel. The
    purpose of this system is to prevent wheel
    locking during heavy braking. This is achieved
    by automatic release of the brake on the
    relevant wheel, followed by reapplication of
    the brake.
    The solenoids are controlled by the ECU
    which receives signals from the four
    roadwheel sensors, which in turn monitor the
    speed of rotation of each wheel. By
    comparing these speed signals from the four
    wheels, the ECU can determine the speed at
    which the vehicle is travelling. It can then use
    this speed to determine when a wheel is
    decelerating at an abnormal rate compared to
    the speed of the vehicle and therefore predict
    when a wheel is about to lock. During normaloperation, the system functions in the same
    way as a non-ABS braking system.
    If the ECU senses that a wheel is about to
    lock, the ABS system enters the ‘pressure
    maintain’ phase. The ECU operates the
    relevant solenoid valve in the modulator block
    which then isolates the brake caliper on the
    wheel which is about to lock from the master
    cylinder, effectively sealing in the hydraulic
    pressure.
    If the speed of rotation of the wheel
    continues to decrease at an abnormal rate,
    the ABS system then enters the ‘pressure
    decrease’ phase, where the electrically-driven
    return pump operates and pumps the
    hydraulic fluid back into the master cylinder,
    releasing pressure on the brake caliper so that
    the brake is released. Once the speed of
    rotation of the wheel returns to an acceptable
    rate, the pump stops and the solenoid valve
    opens thereby allowing the hydraulic master
    cylinder pressure to return to the caliper
    which then reapplies the brake. This cycle can
    be carried out at up to 10 times a second.
    The action of the solenoid valves and return
    pump creates pulses in the hydraulic circuit.
    When the ABS system is functioning, these
    pulses can be felt through the brake pedal.
    The solenoid valves connected to the front
    calipers operate independently, but the valve
    connected to the rear calipers, together with
    the pressure regulating valve, operates both
    calipers simultaneously.
    Operation of the ABS system is entirely
    dependent on electrical signals. To prevent
    the system responding to any inaccurate
    signals, a built-in safety circuit monitors 
    all signals received by the ECU. If an
    inaccurate signal or low battery voltage is
    detected, the ABS system is automatically
    Braking system  9•3
    1.0b  ABS braking system component layout
    9
    1689 Rover 214 & 414 Updated Version 09/971 Primary hydraulic circuit
    2 Secondary hydraulic circuit
    3 Brake pipe - modulator to pressure
    regulating valve
    4 Brake pipe - modulator to pressure
    regulating valve
    5 Brake pipe - modulator to right-hand
    front hose
    6 Brake pipe - modulator to left-hand
    front hose
    7 Brake pipe - modulator to right-hand
    rear hose
    8 Brake pipe - modulator to left-hand
    rear hose
    9 Pressure regulating valve
    10 Handbrake cable
    11 Brake flexible hose - brake pipe to
    front brake caliper
    12 Brake flexible hose - brake pipe to rear
    brake caliper 
    						
    							shut down and the warning lamp on the
    instrument panel is illuminated to inform the
    driver that the ABS system is not operational.
    If a fault does develop in the ABS system
    the vehicle must be taken to a Rover dealer
    for fault diagnosis and repair.
    Precautions
    Hydraulic fluid is poisonous. Wash off
    immediately and thoroughly in the case of skin
    contact and seek immediate medical advice if
    any fluid is swallowed or gets into the eyes.
    Certain types of hydraulic fluid are
    inflammable and may ignite when allowed into
    contact with hot components.
    When servicing any hydraulic system, it is
    safest to assume that the fluid is inflammable
    and to take precautions against the risk of fire
    as though it is petrol that is being handled.
    Hydraulic fluid is also an effective paint
    stripper and will attack plastics. If any is spilt,
    it should be washed off immediately using
    copious quantities of fresh water.
    Hydraulic fluid is hygroscopic, that is, it
    absorbs moisture from the air, so old fluid
    may be contaminated and unfit for further use.
    When topping-up or renewing fluid, always
    use the recommended type and ensure that it
    comes from a freshly-opened sealed
    container.
    When working on brake components, take
    care not to disperse brake dust into the air, or
    to inhale it, since it may contain asbestos
    which is injurious to health.
    When servicing any part of the system,
    work carefully and methodically. Also observe
    scrupulous cleanliness when overhauling any
    part of the hydraulic system. Always renew
    components (in axle sets, where applicable) if
    in doubt about their condition and use only
    genuine Rover replacement parts, or at least
    those of known good quality.
    2 Brake pedal- 
    removal and refitting
    2
    Removal
    1Working inside the vehicle, undo the five
    screws and remove the right-hand lower facia
    panel.
    2Extract the R-clip and clevis pin securing
    the servo unit pushrod to the brake pedal.
    3Using pliers, carefully unhook the brake
    pedal return spring from the pedal to release
    all the spring tension.
    4Slacken and remove the nut and washers
    (as applicable) from the brake pedal pivot bolt
    then withdraw the pivot bolt and remove the
    brake pedal and return spring.
    5Examine all brake pedal components for
    signs of wear, paying particular attention to
    the pedal bushes, pivot bolt and return spring,
    renewing as necessary.
    Refitting
    6Refitting is a reverse of the removal
    procedure. Lubricate the bushes, pivot bolt
    and clevis pin with multi-purpose grease.
    7On completion, check the operation of the
    pedal and ensure that it returns smoothly to
    its at rest position under the pressure of the
    return spring.
    3 Vacuum servo unit- 
    testing, removal and refitting
    3
    Testing
    1To test operation of the servo unit, depress
    the footbrake several times to exhaust the
    vacuum, then start the engine whilst keeping
    the pedal firmly depressed. As the engine
    starts, there should be a noticeable ‘give’ in
    the brake pedal as the vacuum builds up.
    Allow the engine to run for at least two
    minutes then switch it off. If the brake pedal is
    now depressed it should feel normal, but
    further applications should result in the pedal
    felling firmer, with the pedal stroke decreasing
    with each application.
    2If the servo does not operate as described,
    inspect the servo unit check valve, see
    Section 4.
    3If the servo unit still fails to operate
    satisfactorily, the fault lies within the unit itself.
    Repairs to the unit are possible but special
    tools are required and the work should be
    entrusted to a suitably equipped Rover dealer.
    Removal
    4Remove the air cleaner assembly.
    5Remove the master cylinder.
    6Disconnect the vacuum hose connection
    from the grommet on the servo unit, taking
    great care not to damage or displace the
    sealing grommet (see illustration).
    7Working inside the vehicle, undo the five
    retaining screws and remove the right-hand
    lower facia panel.
    8Extract the R-clip and clevis pin securing
    the servo unit pushrod to the brake pedal (see
    illustration).9Slacken and remove the four nuts securing
    the servo unit to the engine compartment
    bulkhead then remove the unit, noting the
    gasket which is fitted to the rear of the unit.
    Refitting
    10Prior to refitting, check the servo unit to
    vacuum hose sealing grommet for signs of
    damage or deterioration and renew if
    necessary.
    11Fit a new gasket to the rear of the servo
    unit and reposition the unit in the engine
    compartment.
    12From inside the vehicle, ensure the servo
    unit pushrod is correctly engaged with the
    brake pedal then refit the servo unit mounting
    nuts and tighten them securely.
    13Refit the servo unit pushrod to brake
    pedal clevis pin and secure it in position with
    the R-clip.
    14Refit the right-hand lower facia panel,
    tightening its retaining screws securely.
    15From inside the engine compartment,
    carefully ease the vacuum hose connection
    back into position in the servo unit, taking
    care not to displace the sealing grommet.
    16Refit the air cleaner assembly and master
    cylinder.
    17On completion, start the engine and
    check for air leaks at the vacuum hose to
    servo unit connection and the operation of the
    braking system.
    4 Vacuum servo unit check
    valve- removal, testing 
    and refitting
    2
    Note:The vacuum servo unit check valve is
    only available as part of the vacuum hose
    assembly. Do not try to remove the valve, 
    the servo unit connection, or the inlet 
    manifold union from the hose or air leaks may
    ensue, necessitating renewal of the hose
    assembly.
    9•4 Braking system
    3.8  Vacuum servo unit and pushrod
    attachments
    1 Servo unit mounting nuts
    2 Pushrod clevis pin
    3 R-clip
    3.6  Master cylinder mounting nuts (A) and
    servo vacuum hose connection (B)
    1689 Rover 214 & 414 Updated Version 09/97 
    						
    							Removal
    1Carefully unplug the hose connection from
    the vacuum servo unit taking care not to
    damage the sealing grommet.
    2Unscrew the union bolt securing the
    vacuum hose assembly to the inlet manifold
    and withdraw the hose assembly from the
    engine compartment. Remove the union bolt
    from the hose end and discard the sealing
    washers.
    Testing
    3Examine the hose for damage, splits,
    cracks or general deterioration. Make sure
    that the check valve inside the hose is
    working correctly by blowing through the
    hose from the servo unit connection end. Air
    should flow in this direction but not when
    blown through from the inlet manifold union.
    Renew the hose and check valve assembly if
    at all suspect.
    4Examine the servo unit sealing grommet for
    signs of damage or deterioration and renew if
    necessary.
    Refitting
    5Position a new sealing washer on each side
    of the hose union and refit the hose-to-inlet
    manifold union bolt. Ensure that the hose
    union locating pin is correctly situated
    between the lugs on the manifold then tighten
    the union bolt to the specified torque setting
    (see illustration).
    6Carefully ease the hose connection into the
    servo unit sealing grommet, taking care not to
    displace or damage the grommet.
    7On completion, start the engine and check
    the vacuum hose-to-servo unit connection for
    signs of air leaks.
    5 Hydraulic fluid- 
    level check and renewal
    Refer to “Weekly Checks”and Chapter 1.
    6 Hydraulic system- bleeding
    3
    General
    1The correct operation of any hydraulic
    system is only possible after removal of all air
    from the components and circuit. This is
    achieved by bleeding the system.
    2During the bleeding procedure, add only
    clean, unused hydraulic fluid of therecommended type. Never re-use fluid that has
    already been bled from the system. Ensure that
    sufficient fluid is available before starting work.
    3If there is any possibility of incorrect fluid
    being already in the system, the brake
    components and circuit must be flushed
    completely with uncontaminated, correct fluid
    and new seals should be fitted to the various
    components.
    4If hydraulic fluid has been lost from the
    system, or air has entered because of a leak,
    then ensure that the fault is cured before
    proceeding further.
    5Park the vehicle on level ground, switch off
    the engine and select first or reverse gear,
    then chock the wheels and release the
    handbrake.
    6Check that all pipes and hoses are secure,
    unions tight and bleed screws closed. Clean
    any dirt from around the bleed screws.
    7Unscrew the master cylinder reservoir cap
    and top the master cylinder reservoir up to the
    MAX level line. Refit the cap loosely and
    remember to maintain the fluid level at least
    above the MIN level line throughout the
    procedure or there is a risk of further air
    entering the system.
    8There are a number of one-man, do-it-
    yourself brake bleeding kits currently available
    from motor accessory shops. It is
    recommended that one of these kits is used
    whenever possible as they greatly simplify the
    bleeding operation and also reduce the risk of
    expelled air and fluid being drawn back into
    the system. If such a kit is not available, then
    the basic (two-man) method must be used
    which is described in detail below.
    9If a kit is to be used, prepare the vehicle as
    described previously and follow the kit
    manufacturer’s instructions as the procedure
    may vary slightly according to the type being
    used. Generally, they are as outlined below in
    the relevant sub-section.
    10Whichever method is used, the same
    sequence must be followed (paragraphs 11
    and 12) to ensure the removal of all air from
    the system.
    Bleeding sequence
    11If the system has been only partially
    disconnected and suitable precautions weretaken to minimise fluid loss, it should be
    necessary only to bleed that part of the
    system (ie: the primary or secondary circuit).
    12If the complete system is to be bled, then
    it should be done working in the following
    sequence:
    Non-ABS models
    Left-hand front brake.
    Right-hand rear brake.
    Right-hand front brake.
    Left-hand rear brake.
    ABS models
    Left-hand front brake.
    Right-hand front brake.
    Left-hand rear brake.
    Right-hand rear brake.
    Bleeding - basic (two-man)
    method
    13Collect a clean glass jar, a suitable length
    of plastic or rubber tubing which is a tight fit
    over the bleed screw and a ring spanner to fit
    the screw. The help of an assistant will also be
    required.
    14Remove the dust cap from the first screw
    in the sequence. Fit the spanner and tube to
    the screw, place the other end of the tube in
    the jar and pour in sufficient fluid to cover the
    end of the tube.
    15Ensure that the master cylinder reservoir
    fluid level is maintained at least above the MIN
    level line throughout the procedure.
    16Have the assistant fully depress the brake
    pedal several times to build up pressure, then
    maintain it on the final stroke.
    17While pedal pressure is maintained,
    unscrew the bleed screw (approximately one
    turn) and allow the fluid and air to flow into the
    jar. The assistant should maintain pedal
    pressure, following it down to the floor if
    necessary and should not release it until
    instructed to do so. When the flow stops,
    tighten the bleed screw again, release the
    pedal slowly and recheck the reservoir fluid
    level.
    18Repeat the steps given in paragraphs 16
    and 17 until the fluid emerging from the bleed
    screw is free from air bubbles. If the master
    cylinder has been drained and refilled and air
    is being bled from the first screw in the
    sequence, allow approximately five seconds
    between cycles for the master cylinder
    passages to refill.
    19When no more air bubbles appear, tighten
    the bleed screw securely, remove the tube
    and spanner and refit the dust cap. Do not
    overtighten the bleed screw.
    20Repeat the procedure on the remaining
    screws in the sequence until all air is removed
    from the system and the brake pedal feels
    firm again.
    Bleeding - using a one-way
    valve kit
    21As their name implies, these kits consist
    of a length of tubing with a one-way valve
    Braking system  9•5
    4.5  Ensure hose union locating pin is
    correctly located between lugs on inlet
    manifold
    9
    1689 Rover 214 & 414 Updated Version 09/97
    Hydraulic fluid is an
    effective paint stripper and
    will attack plastics. If any is
    spilt, it should be washed off
    immediately using copious quantities
    of fresh water. 
    						
    							fitted to prevent expelled air and fluid being
    drawn back into the system. Some kits
    include a translucent container which can be
    positioned so that the air bubbles can be
    more easily seen flowing from the end of the
    tube (see illustration).
    22The kit is connected to the bleed screw,
    which is then opened. The user returns to the
    driver’s seat and depresses the brake pedal
    with a smooth, steady stroke and slowly
    releases it. This sequence is repeated until the
    expelled fluid is clear of air bubbles.
    23Note that these kits simplify work so
    much that it is easy to forget the master
    cylinder reservoir fluid level. Ensure that this is
    maintained at least above the MIN level line at
    all times.
    Bleeding - using a pressure
    bleeding kit
    24These kits are usually operated by the
    reservoir of pressurised air contained in the
    spare tyre, although note that it will probably
    be necessary to reduce the pressure to a
    lower limit than normal. Refer to the
    instructions supplied with the kit.
    25By connecting a pressurised, fluid-filled
    container to the master cylinder reservoir,
    bleeding can be carried out simply by opening
    each screw in turn (in the specified sequence)
    and allowing the fluid to flow out until no more
    air bubbles can be seen in the expelled fluid.
    26This method has the advantage that the
    large reservoir of fluid provides an additional
    safeguard against air being drawn into the
    system during bleeding.
    27Pressure bleeding is particularly effective
    when bleeding ‘difficult’ systems or when
    bleeding the complete system at the time of
    routine fluid renewal.
    All methods
    28When bleeding is complete and firm pedal
    feel is restored, wash off any spilt fluid, tighten
    the bleed screws securely and refit their dust
    caps.
    29Check the hydraulic fluid level and top up
    if necessary.
    30Discard any hydraulic fluid that has been
    bled from the system as it will not be fit for re-
    use.
    31Check the feel of the brake pedal. If itfeels at all spongy, air must still be present in
    the system and further bleeding is required.
    Failure to bleed satisfactorily after a
    reasonable repetition of the bleeding
    procedure may be due to worn master
    cylinder seals.
    7 Hydraulic pipes and hoses-
    inspection
    Refer to Chapter 1, Section 6.
    8 Hydraulic pipes and hoses-
    renewal
    3
    1If any pipe or hose is to be renewed,
    minimise fluid loss by removing the master
    cylinder reservoir cap and then tightening it
    down onto a piece of polythene (taking care
    not to damage the sender unit) to obtain an
    airtight seal. Alternatively, flexible hoses can
    be sealed by using a proprietary brake hose
    clamp, while metal brake pipe unions can be
    plugged (if care is taken not to allow dirt into
    the system) or capped immediately they are
    disconnected (see illustration). Place a wad
    of rag under any union that is to be
    disconnected to catch any spilt fluid.
    2If a flexible hose is to be disconnected,
    unscrew the brake pipe union nut before
    removing the spring clip which secures the
    hose to its mounting bracket.
    3To unscrew the union nuts it is preferable to
    obtain a brake pipe spanner of the correct
    size. These spanners are available from most
    large motor accessory shops (see
    illustration). Failing this, a close-fitting open-
    ended spanner will be required, though if the
    nuts are tight or corroded, their flats may be
    rounded-off if the spanner slips. In such a
    case, a self-locking wrench is often the only
    way to unscrew a stubborn union but it follows
    that the pipe and the damaged nuts must be
    renewed on reassembly. Always clean a union
    and surrounding area before disconnecting it.
    If disconnecting a component with more than
    one union, make a careful note of the
    connections before disturbing any of them.4If a brake pipe is to be renewed, then it can
    be obtained from Rover dealers, cut to length
    and with the union nuts and end flares in
    place. All that is then necessary is to bend it
    to shape, following the line of the original,
    before fitting it to the vehicle. Alternatively,
    most motor accessory shops can make up
    brake pipes from kits but this requires very
    careful measurement of the original to ensure
    that the replacement is of the correct length.
    The safest answer is usually to take the
    original to the shop as a pattern.
    5On refitting, do not overtighten the union
    nuts. The specified torque wrench settings,
    where given, are not high and it is not
    necessary to exercise brute force to obtain a
    sound joint. When refitting flexible hoses,
    always renew any sealing washers used.
    6Ensure that the pipes and hoses are
    correctly routed with no kinks and that they
    are secured in the clips or brackets provided.
    After fitting, remove the polythene from the
    reservoir and bleed the hydraulic system.
    Wash off any spilt fluid and check carefully for
    fluid leaks.
    9 Master cylinder- removal,
    overhaul and refitting
    4
    Warning: Do not syphon brake
    fluid by mouth as it is
    poisonous. 
    Note:Before attempting to overhaul the
    master cylinder, check the price and
    availability of individual components and
    compare this with the price of a new or
    reconditioned unit, as overhaul may not be
    viable on economic grounds alone.
    Removal
    1Remove the master cylinder reservoir cap,
    having disconnected the sender unit wiring
    connector, and syphon all hydraulic fluid from
    the reservoir. Do not syphon the fluid by mouth
    as it is poisonous but use a syringe or an old
    poultry baster. Alternatively, open any
    convenient bleed screw in the system and
    gently pump the brake pedal to expel the fluid
    through a plastic tube connected to the screw.
    9•6 Braking system
    8.1  Using a brake hose clamp to minimise
    fluid loss
    6.21 Using a one-way valve kit to bleed
    braking system
    1689 Rover 214 & 414 Updated Version 09/97
    8.3  Using a brake pipe spanner to
    unscrew a union nut 
    						
    							2Wipe clean the area around the brake pipe
    unions on the side of the master cylinder and
    place absorbent rags beneath the pipe unions
    to catch any surplus fluid. Unscrew the two
    union nuts and carefully withdraw the pipes.
    Plug or tape over the pipe ends and master
    cylinder orifices to minimise loss of brake fluid
    and to prevent the entry of dirt into the
    system. Wash off any spilt fluid immediately
    with cold water.
    3Slacken and remove the two nuts and
    washers securing the master cylinder to the
    vacuum servo unit then withdraw the unit from
    the engine compartment. Remove the O-ring
    from the rear of the master cylinder and
    discard it.
    Overhaul
    4Remove the master cylinder from the
    vehicle as described above and clean it
    thoroughly.
    5Carefully prise the reservoir from the master
    cylinder body and remove the two mounting
    seals (see illustrations).
    6Prepare a clean working surface and
    proceed as follows.
    Non-ABS system
    7Using a wooden dowel, press the primary
    piston in as far as possible and extract thesecondary piston stop pin from the reservoir
    inlet port, then remove the retaining circlip.
    8Noting the order of removal and the
    direction of fitting of each component,
    withdraw the piston assemblies with their
    springs and seals, tapping the body on to a
    clean wooden surface to dislodge them. If
    necessary, clamp the master cylinder body in
    a vice (fitted with soft jaw covers) and use
    compressed air of low pressure (applied
    through the secondary circuit fluid port) to
    assist the removal of the secondary piston
    assembly.
    9Thoroughly clean all components using
    only methylated spirit, isopropyl alcohol or
    clean hydraulic fluid as a cleaning medium.
    Never use mineral-based solvents such as
    petrol or paraffin which will attack the
    hydraulic system’s rubber components. Dry
    the components immediately using
    compressed air or a clean, lint-free cloth.
    10Check all components and renew any that
    are worn or damaged. Check particularly the
    cylinder bores and pistons. The complete
    assembly should be renewed if these are
    scratched, worn or corroded. If there is any
    doubt about the condition of the assembly or
    of any of its components, renew it. Check that
    the body’s inlet and bypass ports are clear.11If the assembly is fit for further use, obtain
    a repair kit. Renew all seals and O-rings
    disturbed on dismantling, never re-use them.
    Renew also any other items included in the
    repair kit.
    12On reassembly, soak the pistons and new
    seals in clean hydraulic fluid. Smear clean
    fluid into the cylinder bore.
    13Fit the new seals to their pistons, using
    only the fingers to manipulate them into the
    grooves.
    14Insert the pistons into the bore by using a
    twisting motion to avoid trapping the seal lips.
    Ensure that all components are refitted in the
    correct order and the right way round.
    15Press the secondary piston assembly fully
    up into the bore using a clean wooden dowel,
    then refit the stop pin.
    16Refit the primary piston assembly, then
    secure it in position with a new circlip.
    17Press the new mounting seals into the
    master cylinder body and carefully refit the
    reservoir ensuring that it is pressed fully into
    position.
    ABS system
    18Carefully prise out the dust cap from the
    rear of the master cylinder body and remove
    the flat washer.
    19Using a wooden dowel, press the primary
    Braking system  9•7
    9.5a  Non-ABS master cylinder components
    1 Master cylinder reservoir
    2 Mounting seals
    3 Secondary piston stop pin
    4 Master cylinder body5 Spring
    6 Circlip
    7 Primary piston
    8 Secondary piston9.5b  ABS master cylinder components
    1 Master cylinder
    reservoir
    2 Mounting seals
    3 Master cylinder
    body4 Spring
    5 Secondary piston
    6 Retaining pin
    7 Grub screw
    8 Spring9 Primary piston
    10 Washer
    11 Circlip
    12 Flat washer
    13 Dust cap
    9
    1689 Rover 214 & 414 Updated Version 09/97 
    						
    							piston in as far as possible and extract the
    circlip and washer. Withdraw the primary
    piston assembly and spring.
    20Undo the grub screw from the underside
    of the master cylinder body then use the
    wooden dowel to press the secondary 
    piston into the body and withdraw the
    secondary piston retaining pin. Extract 
    the secondary piston assembly and spring. If
    necessary, the piston can be dislodged by
    tapping the master cylinder body on a
    wooden block.
    21Examine and overhaul the master cylinder
    components as described above in
    paragraphs 9 to 14.
    22Fit the spring to the secondary piston
    assembly and use a clean wooden dowel to
    press the assembly fully into the master
    cylinder bore. Align the slot in the piston with
    the retaining pin hole then insert the
    secondary piston retaining pin. Refit the grub
    screw and tighten it securely.
    23Fit the spring to the primary piston
    assembly and press the assembly into position
    using the wooden dowel. Refit the washer and
    secure the piston assembly in position with the
    circlip, ensuring that it is correctly located in its
    groove in the master cylinder bore.
    24Fit the flat washer and refit the dust cap to
    the rear of the master cylinder body.
    25Align the lugs on the new mounting seals
    with the slots in the master cylinder body and
    press them into position. Carefully refit the
    reservoir, ensuring that it is pressed fully into
    the master cylinder body.Refitting
    26Remove all traces of dirt from the master
    cylinder and servo unit mating surfaces, then
    fit a new O-ring to the groove on the master
    cylinder body.
    27Fit the master cylinder to the servo unit,
    ensuring that the servo unit pushrod enters
    the master cylinder bore centrally. Refit the
    master cylinder washers and mounting nuts
    and tighten them to the specified torque.
    28Wipe clean the brake pipe unions then
    refit them to the master cylinder ports 
    and tighten them to the specified torque
    setting.
    29Refill the master cylinder reservoir with
    new fluid and bleed the hydraulic system.
    10 Front brake pads- 
    inspection
    Refer to Chapter 1.
    11 Front brake pads- 
    renewal
    2
    Warning: Renew both sets of
    front brake pads at the same
    time. Never renew the pads on
    only one wheel as uneven braking may
    result. The dust created by pad wear may
    contain asbestos, which is a health hazard.Never blow it with compressed air or
    inhale it. An approved filtering mask
    should be worn when working on the
    brakes. DO NOT use petroleum-based
    solvents to clean brake parts. Use brake
    cleaner or methylated spirit only.
    Removal
    1Chock the rear wheels, firmly apply the
    handbrake then jack up the front of the
    vehicle and support it on axle stands. Remove
    both front roadwheels.
    2Remove the lower caliper guide pin bolt
    whilst, if necessary, using a slim open-ended
    spanner to prevent the guide pin itself from
    rotating. Pivot the caliper away from the disc
    to gain access to the brake pads and tie it to
    the suspension strut using a piece of wire
    (see illustrations).
    3Remove the circular shim which is fitted to
    the caliper piston (see illustration).
    4Remove the brake pads from the caliper
    mounting bracket whilst noting the correct
    position of the pad retainer springs and pad
    shims (see illustration).
    5Measure the thickness of friction material
    remaining on each brake pad (see illustration).
    If either pad is worn at any point to the
    specified minimum thickness or less, all four
    pads must be renewed. Also, the pads should
    be renewed if any are fouled with oil or grease
    as there is no satisfactory way of degreasing
    friction material once contaminated. If any of
    the brake pads are worn unevenly or fouled
    with oil or grease, trace and rectify the cause
    before reassembly. New brake pad kits are
    available from Rover dealers and include new
    shims and pad retainer springs.
    6If the brake pads are still serviceable,
    carefully clean them using a clean, fine wire
    brush or similar, paying particular attention to
    the sides and back of the metal backing. Clean
    out the grooves in the friction material (where
    applicable) and pick out any large embedded
    particles of dirt or debris. Carefully clean the
    pad retainer springs and the pad locations in
    the caliper body and mounting bracket.
    Fitting
    7Prior to fitting the pads, check that the
    guide pins are free to slide easily in the caliper
    9•8 Braking system
    11.5  Measuring thickness of brake pad
    friction material11.4  Removing pads with springs and
    shims11.3  Removing circular shim from caliper
    piston
    11.2b  . . . and pivot caliper away from disc11.2a  Remove lower caliper guide 
    pin bolt . . .
    1689 Rover 214 & 414 Updated Version 09/97 
    						
    							bracket and check that the rubber guide pin
    gaiters are undamaged (see illustration).
    Brush the dust and dirt from the caliper and
    piston but do notinhale it as it is injurious to
    health. Inspect the dust seal around the piston
    for damage and the piston for evidence of
    fluid leaks, corrosion or damage. Renew as
    necessary.
    8On refitting, first fit the pad retainer springs
    to the caliper mounting bracket (see
    illustration).
    9Apply a thin smear of high-temperature
    brake grease (silicone- or PBC/Poly Butyl
    Cuprysil-based) or anti-seize compound (eg
    Holts Copaslip) to the sides and back of each
    pad’s metal backing and to those surfaces of
    the caliper body and mounting bracket which
    bear on the pads. Fit the shims to the back of
    both pads and apply a thin smear of lubricant
    to the back of each shim. Do not allow the
    lubricant to foul the friction material (see
    illustration).
    10Install the brake pads in the caliper
    mounting bracket, ensuring that the friction
    material is against the disc.
    11If new brake pads have been fitted, the
    caliper piston must be pushed back into the
    cylinder to make room for them. Either use a
    G-clamp or similar tool, or use suitable pieces
    of wood as levers. Provided that the master
    cylinder reservoir has not been overfilled with
    hydraulic fluid there should be no spillage but
    keep a careful watch on the fluid level while
    retracting the piston. If the fluid level rises
    above the MAX level line at any time, the
    surplus should be syphoned off or ejected via
    a plastic tube connected to the bleed screw.
    12Apply a thin smear of the recommended
    lubricant (see above) to the circular shim and
    fit the shim to the caliper piston. Pivot the
    caliper body down over the brake pads then
    refit the bottom guide pin bolt and tighten it to
    the specified torque wrench setting.
    13Check that the caliper body slides
    smoothly in the mounting bracket, then
    depress the brake pedal repeatedly until the
    pads are pressed into firm contact with the
    brake disc and normal (non-assisted) pedal
    pressure is restored.
    14Repeat the above procedure on the
    remaining front brake caliper.15Refit the roadwheels, then lower the
    vehicle to the ground and tighten the
    roadwheel nuts to the specified torque
    setting.
    16On completion, check the hydraulic fluid
    level.
    12 Front brake caliper- 
    removal, overhaul and refitting
    4
    Warning: Brake hydraulic fluid
    may be under considerable
    pressure in a pipeline, take care
    not to allow hydraulic fluid to
    spray into the face or eyes when loosening
    a connection.
    Removal
    1Chock the rear wheels, firmly apply the
    handbrake, jack up the front of the vehicleand support on axle stands. Remove the
    appropriate front roadwheel.
    2Minimise fluid loss either by removing the
    master cylinder reservoir cap and then
    tightening it down onto a piece of polythene
    to obtain an airtight seal (taking care not to
    damage the sender unit), or by using a brake
    hose clamp, a G-clamp or a similar tool to
    clamp the flexible hose.
    3Clean the area around the union, then undo
    the brake hose union bolt and disconnect 
    the hose from the caliper. Plug the end of the
    hose and the caliper orifice to prevent dirt
    entering the hydraulic system. Discard the
    sealing washers as they must be renewed
    whenever disturbed.
    4Unscrew the two caliper guide pin bolts
    whilst, if necessary, using a slim open-ended
    spanner to prevent the guide pins themselves
    from rotating (see illustration).
    5Carefully lift the caliper assembly off the
    brake pads and remove the circular shim from
    Braking system  9•9
    11.9  . . . and fit shims on pads11.8  Fit pad retainer springs to caliper
    bracket . . .11.7  Check condition of guide pins and
    gaiters before refitting pads
    12.4  Front brake caliper components
    9
    1689 Rover 214 & 414 Updated Version 09/971 Bleed screw
    2 Caliper body
    3 Guide pin bolt
    4 Guide pin
    5 Gaiter
    6 Pad retainer spring
    7 Caliper mounting
    bracket
    8 Inner pad shim
    9 Brake pads
    10 Outer pad shim
    11 Piston seal
    12 Piston
    13 Dust seal
    14 Circular shim 
    						
    							the caliper piston. Note that the brake pads
    need not be disturbed and can be left in
    position in the caliper mounting bracket.
    Overhaul
    6With the caliper on the bench, wipe away all
    traces of dust and dirt. Avoid inhaling the dust
    as it is injurious to health.
    7Withdraw the piston from the caliper body
    and remove the dust seal. The piston can be
    withdrawn by hand or if necessary, pushed
    out by applying compressed air to the union
    bolt hole. Only low pressure should be
    required such as is generated by a foot pump.
    8Using a small screwdriver, extract the
    piston hydraulic seal whilst taking great care
    not to damage the caliper bore.
    9Withdraw the guide pins from the caliper
    mounting bracket and remove the guide pin
    gaiters.
    10Thoroughly clean all components using
    only methylated spirit, isopropyl alcohol or
    clean hydraulic fluid as a cleaning medium.
    Never use mineral-based solvents such as
    petrol or paraffin which will attack the
    hydraulic system’s rubber components. Dry
    the components immediately using
    compressed air or a clean, lint-free cloth. Use
    compressed air to blow clear the fluid
    passages.
    11Check all components and renew any that
    are worn or damaged. Check particularly the
    cylinder bore and piston. These should be
    renewed (note that this means the renewal of
    the complete body assembly) if they are
    scratched, worn or corroded in any way.
    Similarly, check the condition of the guide
    pins and their bores in the mounting bracket.
    Both guide pins should be undamaged and
    (when cleaned) a reasonably tight sliding fit in
    the mounting bracket bores. If there is any
    doubt about the condition of any component,
    renew it.
    12If the assembly is fit for further use, obtain
    the appropriate repair kit. Components are
    available from Rover dealers in various
    combinations.
    13Renew all rubber seals, dust covers and
    caps. Also the sealing washers disturbed on
    dismantling.
    14On reassembly, ensure that all
    components are absolutely clean and dry.15Soak the piston and the new piston (fluid)
    seal in clean hydraulic fluid. Smear clean fluid
    on the cylinder bore surface.
    16Fit the new piston (fluid) seal using only
    the fingers to manipulate it into the cylinder
    bore groove. Fit the new dust seal to the
    piston and refit it to the cylinder bore using a
    twisting motion, ensuring that the piston
    enters squarely into the bore. Press the piston
    fully into the bore, then secure the dust seal to
    the caliper body.
    17Apply the grease supplied in the repair kit,
    or a good quality high-temperature brake
    grease (silicone- or PBC/Poly Butyl Cuprysil-
    based) or anti-seize compound (eg Holts
    Copaslip), to the guide pins and fit the new
    gaiters. Fit the guide pins to the caliper
    mounting bracket, ensuring that the gaiters
    are correctly located in the grooves on both
    the guide pin and mounting bracket.
    Refitting
    18Refit the circular shim to the piston and
    carefully slide the caliper into position over the
    brake pads. Refit the caliper guide pin bolts
    and tighten them to the specified torque
    setting.
    19Position a new sealing washer on each
    side of the hose union and refit the brake hose
    union bolt. Ensure that the brake hose union is
    correctly positioned between the lugs on the
    caliper then tighten the union bolt to the
    specified torque setting.
    20Remove the brake hose clamp, where
    fitted, and bleed the hydraulic system.
    Providing the precautions described were
    taken to minimise brake fluid loss, it should
    only be necessary to bleed the relevant front
    brake.
    21Refit the roadwheel then lower the vehicle
    to the ground and tighten the roadwheel nuts
    to the specified torque.
    13 Front brake disc- inspection,
    removal and refitting
    3
    Note:If either brake disc requires renewal,
    both should be renewed at the same time to
    ensure even and consistent braking.
    Inspection
    1Chock the rear wheels, firmly apply the
    handbrake, jack up the front of the vehicle
    and support on axle stands. Remove the
    appropriate front roadwheel.
    2Slowly rotate the brake disc so that the full
    area of both sides can be checked. Remove
    the brake pads if better access is required 
    to the inboard surface. Light scoring is normal
    in the area swept by the brake pads but if
    heavy scoring is found, then the disc must be
    renewed. The only alternative to this is to have
    the disc surface-ground until it is flat again,
    but this must not reduce the disc to less than
    the minimum thickness specified.
    3It is normal to find a lip of rust and brake
    dust around the disc’s perimeter. This can be
    scraped off if required. If, however, a lip has
    formed due to excessive wear of the brake
    pad swept area, then the disc’s thickness
    must be measured by using a micrometer
    (see illustration). Take measurements at four
    places around the disc at the inside and
    outside of the pad swept area. If the disc has
    worn at any point to the specified minimum
    thickness or less, then it must be renewed.
    4If the disc is thought to be warped, it can be
    checked for run-out (at a point 6.0 mm in from
    the disc’s outer edge) by either using a dial
    gauge mounted on any convenient fixed point,
    while the disc is slowly rotated, or by using
    feeler gauges to measure (at several points all
    around the disc) the clearance between the
    disc and a fixed point, such as the caliper
    mounting bracket (see illustration). If the
    measurements obtained are at the specified
    maximum or beyond, the disc is excessively
    warped and must be renewed. However, it is
    worth checking first that the hub bearing is in
    good condition. Also, try the effect of removing
    the disc and turning it through 180º to
    reposition it on the hub. If run-out is still
    excessive the disc must be renewed.
    5Check the disc for cracks, especially
    around the stud holes, and any other wear or
    damage. Renew it if any of these are found.
    Removal
    6Unscrew the two bolts securing the caliper
    mounting bracket to the swivel hub and slide the
    caliper assembly off the disc (see illustration).
    9•10 Braking system
    13.6  Removing caliper assembly13.4  Using a dial gauge to check brake
    disc run-out13.3  Using a micrometer to measure
    brake disc thickness
    1689 Rover 214 & 414 Updated Version 09/97 
    						
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