Land Rover Defender 90 Workshop 2nd Edition Nas Rover Manual

54FRONT AXLE AND FINAL DRIVE
2
OVERHAUL FRONT STUB AXLE, CONSTANT VELOCITY JOINT
AND SWIVEL PIN HOUSING
Service repair no - 60.15.43.
Remove stub axle, axle shaft and constant
velocity joint.
1.Remove front hub assembly.
See Repair,
Front Hub Assembly
2.Drain swivel pin housing and refit plug.
NOTE: On later vehicles the swivel pin
housing is filled with grease for life
service. The level and drain plugs have
been deleted.
3.Remove 6 bolts retaining stub axle to swivel
housing.
4.Remove mud shield....

FRONT AXLE AND FINAL DRIVE
3
OVERHAUL 12.Examine all components in particular inner and
outer track, cage balls and bearing surfaces for
damage and excessive wear.
13.Maximum acceptable end-float on assembled
joint 0,64mm, 0.025 in. Renew if worn or
damaged. Lubricate with a recommended oil
during assembly.
Fit constant velocity joint to axle
14.Fit collar and a new circlip.
15.Engage constant velocity joint on axle shaft
splines and using a soft mallet, drive joint in fully.
Renew stub axle,thrust ring,...

54FRONT AXLE AND FINAL DRIVE
4
OVERHAUL Swivel pin housing assembly
22.Remove brake disc shield bracket.
23.Disconnect track-rod end ball joint from housing.
24.Disconnect drag-link ball joint.
25.Disconnect jump hoses from brake jump hose
bracket.
26.Remove road speed sensor.
27.Remove 6 bolts securing oil seal and retaining
plate to swivel pin housing. Prise seal from
swivel pin housing.
NOTE: Oil seal and retaining plate cannot
be removed until swivel pin bearing
housing is removed.
28.Remove 2 screws...

FRONT AXLE AND FINAL DRIVE
5
OVERHAUL
54.Apply a recommended grease between lips of
swivel housing oil seal.
55.Secure oil seal with retaining plate and securing
bolts. Tighten to
11Nm, 8 lbf ft.
56.Fit track-rod and drag link and secure with new
cotter pins.
57.Loosely fit lock stop bolt for later adjustment.
58.Fit brake disc shield.
Fit driveshaft and stub axle
59.Insert axle shaft, and when differential splines
are engaged, push assembly in fully.
CAUTION: Take care not to damage axle
shaft oil...

FRONT AXLE AND FINAL DRIVE
1
SPECIFICATIONS, TORQUE TORQUE VALUES
FRONT AXLE Nm.................................................................. lbf/ft
Hub driving member to hub 65*.............................................. 48*
Brake disc to hub 73............................................................. 55
Stub axle to swivel pin housing 65*........................................ 50*
Brake caliper to swivel pin housing 82.................................. 60
Upper swivel pin to swivel pin...

STEERING
1
DESCRIPTION AND OPERATION DESCRIPTION
The steering system incorporates a compression joint
in the lower shaft and is designed to collapse on
impact. The misalignment of the upper steering
column with the steering box and the inclusion of two
universal joints, is also designed to prevent the
column moving towards the driver under frontal
impact.
The steering box is located behind the first chassis
cross member and is connected to the road wheel
swivel housing by a drag link and track rod. An...

57STEERING
2
DESCRIPTION AND OPERATION
Power steering box components
1.Housing complete with sector shaft bearings
2.Cover plate complete with bearing
3.Sector shaft
4.Hydraulic piston/rack
5.Worm/valve and torsion bar assembly
6.Shims for centralizing worm/valve
7.Ball race - 2 off
8.Teflon seals for valve sleeve - 3 off
9.Bearing adjuster, locknut and seal
10.Worm shaft pressure seal, circlip and dirt
excluder11.Teflon and rubber seal for piston
12.End cover seal and snap ring
13.Adjustment components...

STEERING
3
DESCRIPTION AND OPERATION Rotary valve operation
The rotary valve assembly comprises a worm (1),
valve sleeve (2), input shaft (4) and torsion bar (5).
The valve sleeve is retained inside the worm by a trim
screw (3), and incorporates valve ports in its inner
bore. The input shaft is attached to the steering wheel
via a steering shaft and steering column and
incorporates valve ports in its outer diameter to align
with those in the sleeve. The torsion bar which is
secured to the worm and input...

57STEERING
4
DESCRIPTION AND OPERATION Demand for assistance (Valve misaligned)
When the steering wheel and input shaft is turned,
steering resistance transmitted to the worm causes
the torsion bar to be twisted and the valve ports to be
misaligned for a right or left turn. The misalignment of
the valve ports directs all fluid pressure A to one side
of the piston only and allows displaced fluid B on the
other side.
When demanding maximum assistance, any
excessive fluid output from the pump due to high...

STEERING
5
DESCRIPTION AND OPERATION Pump and regulator valve operation
The pump which is belt driven from the engine is an
eccentric roller type and also houses the pressure
regulator and flow control valve. The pressure is
controlled by a spring loaded ball valve (3) which is
housed inside the flow control valve piston (4).
No demand for assistance
High flow through box - Low pressure
With no demand for assistance the rotary valve in the
steering box acts as a pressure relief valve, allowing
fluid A to...