Land Rover Series Operation Part 1 2 Rover Manual

							APRIL 195096over the inner edge of the wheel. To ensure even weight distribution, four
rubber support blocks are supplied which should be bolted to the panel so
that the weight is taken on the tyre wall; the two thick blocks should be used
at the sides and the thin ones at front and rear.
With the spare wheel carried on the bonnet in this way, it is not possible to
fold the windscreen into the horizontal position.
COMBINE HARVESTER TOWING PLATE. A special towing plate, can
also be way to supplied to order, to suit combine-harvester equipment. It is
secured to the rear drawbar in a similar way to the standard towing plate.
ANCHOR BRACKET FOR PINTLE PIN. A special anchor bracket can be
supplied as extra equipment, to enable the standard pintle pin to be used
with the rear power take-off unit in position.
ALTERNATIVE TOWING JAW. An
alternative pattern towing jaw, secured to
the rear chassis cross member by means
of four bolts, can be supplied in place of
the standard type.
POWER TAKE-OFF UNITS. The lay-out
of the Land-Rover transmission has been
arranged so that power take-off drive for
auxiliary equipment can be taken from
two points. A pulley drive fitted
immediately behind the gearbox (called
the centre power take-off) can be used for
driving appliances such as an arc welder
or compressor mounted on the vehicle,
while the take-off unit at the rear, with spline and pulley drive, is for the
purpose of driving all kinds of farm machinery, both stationary and towed.
Either or both of these drives may be readily installed at any time and their
presence in no way affects normal operation of the vehicle.
The drive is taken through a dog-clutch on the rear of the gearbox mainshaft
and incorporates a flanged output shaft (Fig. 6). Selector mechanism is
bolted to the top of the transfer casing, the selector lever being accessible
through the hinged cover plate in the centre of the seat-box (Fig. 3). To
engage the power take-off drive, the selector knob must be pushed forward.Fig. 50.  Alternative towing jaw. 
						

							APRIL 195097No maintenance attention is required at this point as lubrication is provided
by the oil in the transfer casing.
An engine governor must be fitted when either the centre or rear pulley
drive is in use.
The procedure for fitting the power take-off drive and selector units to the
gearbox is as follows:-
Remove the centre inspection panel from the seat box.
Remove the four nuts and spring washers securing the top cover-plate on
the transfer casing and lift off the cover complete with joint washer.
Remove the mainshaft rear bearing housing assembly and joint washer from
the rear of the transfer casing, by removing six nuts and spring washers.
Fit the power take-off drive unit assembly and joint washer to the rear of the
transfer casing and secure with the six nuts and spring washers.
Fit the power take-off selector assembly and joint washer to the top face of
the transfer casing and secure with the four nuts and spring washers; ensure
that the selector fork engages with the dog clutch on the drive shaft.
Replace the seat box inspection panel.
CENTRE POWER TAKE-OFF. The driving pulley, usually of the multi-
belt pattern, bolts directly on to the flanged output shaft. Appropriate
operating instructions will be given by the equipment manufacturer, but
mention must be made here of one important maintenance point. When
multiple drive belts are used, it is essential that each belt carry an equal
share of the load. Some stretching of the belts will occur in services so that
should one break or become damaged, all must be replaced. In the event of
the belts being removed at any time, they should be marked and replaced in
the same pulley grooves as originally fitted.
With belts of the “V” type, the drive is taken on the sides and it is not
therefore necessary to adjust them tightly and so put an excessive load on
the pulley bearings. The tension is correct when it is possible to depress the
belts by thumb pressure approximately 1 in. to 1 in. (12 mm. to 25 mm.)
at a point mid-way between the pulleys.
As the pulley drive is taken from the rear of the gearbox, it follows that the
pulley speed will vary with the ratio selected in the main gearbox and a
wide speed range is thus obtainable. The table below gives the pulley speed
in each gear for each position of the governor control; reference should
always be made to this chart to enable the operating speed of the equipment
to be set as nearly as possible to that recommended by the manufacturer. 
						

							APRIL 195098CENTRE POWIER TAKE-OFF PULLIEY R.P.M.
MAIN GEAR CHANGE LEVER INGovernor
positionEngine
R.P.M.
FirstSecondThirdTop115005007351090150021650550810120516503180060088013101800419506509551415195052100700103015252100622507501100163022507240080011751740240082550850125018502550927009001320195527001028509501395206528501130001000147021753000When it is desired to use the power take-off with the vehicle stationary, the
transfer change lever must be set in the neutral (central) position. To engage
the drive, set the engine at idling speed, depress the clutch pedal, engage the
required gear in the main gearbox and with the clutch pedal still depressed,
engage the take-off drive by pushing the selector lever forward, easing the
clutch as necessary to obtain engagement; release the clutch pedal and move
the governor quadrant control to the required position.
To disengage the drive, move the governor control to the lowest position,
depress the clutch pedal, disengage the take-off drive and return the main
gear change lever to neutral. Before re-engaging the drive, always allow the
driven equipment to “coast” to a stand-still, to prevent undue strain on the
drive
When selecting governor and gear-change lever positions to arrive at the
correct speed for driving any particular item of equipment (with the vehicle
stationary) the aim should always be to choose as high a gear ratio as
possible, provided that the throttle is not fully open when working under
load. The use of a high gear will keep the engine speed down to a minimum
and so result in economical fuel consumption.
In cases where the equipment is to be driven with the vehicle on the move,
the gear and governor positions selected will of course be dictated to a large
extent by the vehicle speed required, but an endeavour should be made to
keep the main gearbox 
						

							APRIL 195099ratio as high as possible. The vehicle speeds in all combinations of gears
and governor positions are given in the chart on Page 101.
REAR POWER TAKE-OFF. The rear power take-off unit, mounted on the
rear chassis cross-member, is driven by a propeller shaft from the flanged
output shaft at the rear of the gearbox; the standard six-splined output shaft
(ten-splined on a few early vehicles) is on the centre-line of the vehicle and
provides power for towed equipment, such as a mower, binder, etc. (Fig.
51).Fig. 51.  Rear power take-offA – 6-splined output shaft.
B – Drain plug (under casing).
C – Oil level/filler plug.D – Shield for output shaft.
E – Breather.
F – Three attachment bolts.Assuming the gearbox drive and selector units to be already installed, the
procedure for fitting the rear power take-off unit is as follows:-
Secure the propeller shaft to the input flange of the rear take-off unit by
means of four self-locking nuts, with the sliding joint at the front.
Pass the sliding joint end of the propeller shaft forward through the holes
provided in the rear and centre chassis cross members. Secure the power
take-off unit to the rear cross member by means of two long and one short
bolts, three spring washers and nuts.
Secure the front end of the propeller shaft to the flanged drive shaft on the
gearbox by means of the four bolts and self-locking nuts. 
						

							APRIL 1950100Lubrication nipples are provided at the sliding joint and both universal
joints on the propeller shaft; they should be lubricated at intervals of 500
hours, using the correct grade of oil.
The power take-off housing is provided with a drain plug and a combined
oi1 level/filler plug at the side. Check the oil level every 30 hours by
removing the level plug; if any oil runs out, allow it to do so, but if the level
is low add oil of the correct grade until it reaches the bottom of the level
hole. Replace the plug securely.
The oil should be completely drained after the first 25 hours’ running and
thereafter at every 100 hours, by removing the drain plug in the bottom of
the housing. Refill with new oil to the bottom of the level hole; the capacity
of the unit is approximately 1 pint (0,5 litre).
Selection of the most satisfactory positions for the governor quadrant
control, main gear-change lever and transfer gear-change lever will depend
on various factors:-
(i) Type of  ground to be negotiated.
(ii) Power required to pull any particular item of equipment.
(iii) Crop conditions.
(iv) Recommended speed for the equipment to be used.
The table below gives the vehicle and output shaft speeds for all positions
of the governor control and in all gears; this should be used to arrive at the
correct relationship between the vehicle and take-off shaft speeds for the
particular job in hand.
When the rear power take-off is to be used with the vehicle stationary, the
transfer lever must be placed in the neutral position; for all other work, the
correct transfer ratio must be used, as shown in the chart. The procedure for
engaging and disengaging the drive is identical with that for the centre
power take-off (Page 98); certain farm machines will be damaged, if driven
in reverse and care must be taken in such cases to disengage the take-off
drive when it is desired to reverse the vehicle.
A guard is provided for the splined output shaft and this should always be
fitted to ensure the safety of the operator. 
						

							APRIL 1950101REAR POWER TAKF-OFF
Shaft Speeds (R.P.M.) and Vehicle Speeds (M.P.H.) with 4.7-1 Axle Ratio
and 6.00-16 Tyres.
MAIN GEARCHANCE LEVER IN:FIRSTSECONDTHIRDTOPGovernor
PositionTransfer
Box
In
Take-Off
R.P.MVehicle
Speed
M.P.HTake-Off
R.P.MVehicle
Speed
M.P.HTake-Off
R.P.MVehicle
Speed
M.P.HTake-Off
R.P.MVehicle
Speed
M.P.HEngine
SpeedLow4153.06104.49106.512508.91
High4157.561011.091016.0125022.51500Low4603.36704.810007.213759.82
High4608.367012.0100018.0137525.01650Low5003.67355.310907.8150010.53
High5009.073513.0109019.5150027.01800Low5403.97955.711808.4162511.54
High5409.879514.5118021.0162529.01950Low5854.28556.112709.1175012.55
High58510.585515.5127023.0175031.52100Low6254.59206.613609.7187513.56
High62511.592016.5136025.0187534.02250Low6704.89807.0145010.4200014.57
High67012.098017.5145026.0200036.02400Low7105.110407.4154011.0212515.08
High71013.0104019.0154027.5212538.02550Low7505.411007.9163012.0225016.09
High75013.5110020.0163029.0225040.52700Low7905.711608.3172012.5237517.010
High79014.0116021.0172031.0237542.52850Low8356.012258.8182013.0250018.011
High83515.0122522.0182032.5250045.03000NOTE.-The 20 and 24 teeth gears in the rear power take-off unit are
normally arranged to give a 5:.6 reduction in speed between the gearbox
output and power take-off output shafts; the above chart applies to this
condition.
Occasion may arise when this standard relationship between vehicle speed
and power take-off R.P.M. is unsuitable for some particular item of
equipment which the Land-Rover is called upon to operate. For this reason,
provision has been made to transpose the take-off unit gears, so giving a 6:5
step-up in take-off output speed against gearbox output speed. 
						

							APRIL 1950102With the gears interchanged, the take-off output shaft R.P.M. at any given
engine speed are increased by 36/25 over the R.P.M. shown in the table.
For example:-
At governor position 1, i.e., engine speed 1,500 R.P.M., with top gear
engaged in the main gearbox, the chart shows that take-off speed is 1,250
R.P.M. with the standard 5:6 reduction. Under the same conditions, but with
the gears transposed, take- off speed would be increased to 1,800 R.P.M.
Conversely, an equivalent decrease in vehicle speed at any given take-off
speed can be achieved by transposing the gears.
For example: -
Again with top gear engaged in the main gearbox and low transfer ratio
employed, the governor setting to give a take-off speed of approximately
1,800 R.P.M. (i.e., governor position 5) results in a vehicle speed of 12.5
M.P.H. with the standard 5:6 reduction. Under the same conditions, but
with the take-off gears transposed, the same take-off speed of 1,800 R.P.M.
would be achieved at governor position 1, when the vehicle speed would be
reduced to 8.9 M.P.H.
The procedure to be followed to transpose the gears is as follows:-
Remove the rear pulley unit (if fitted).
Drain off the oil from the take-off unit.
Disconnect the take-off propeller shaft from the gearbox output
flange.
Remove the take-off unit from the chassis frame.
Disconnect the propeller shaft from the take-off input flange.
Remove the input shaft cover plate.
Remove the split pin, castle nut and plain washer from the end of
the input shaft.
Remove the input shaft bearing housing complete with bearing.
Remove and preserve the shims from the input shaft and withdraw
the 20-teeth gear.
Withdraw the 24-teeth gear from the output shaft in a similar
manner.
Transpose the gears and reassemble the unit by reversing the
sequence of stripping operations.
It is most important that the two sets of shims removed be replaced
on their original shafts.
Re-fill the unit with one of the oils listed in the lubrication section. 
						

							APRIL 1950103REAR PULLEY DRIVE.The 8in. (200 mm.) rear pulley unit (Fig. 52) is
so designed that it may be attached to the rear drive unit in place of the
guard by means of four spring washers and nuts, thus making for easy
installation and removal.
A combined oil level/filler plug is provided at the side of the housing.
Check the oil level every 30 hours by removing the plug; if any oil runs out,
allow it to do so, but if the level is low add oil of the correct grade, until it
reaches the bottom of the level hole. Replace the plug.Fig. 52.  Rear pulley drive.
A – Oil level/filler plug.
B – Breather.C – Four attachment points.
The oil should be completely drained after the first 25 hours running and
thereafter at every 100 hours; refill with new oil to the bottom of the level
hole; the capacity of the unit is approximately 1 pint (0,5 litre).
It is most important to ensure alignment of the belt in the centre of the
pulley and also to obtain the correct tension on the belt; the belt tension is
correct when the hand-brake will hold the vehicle and the two sides of the
belt cannot be compressed completely together by hand at a point midway
between the vehicle and the driven machine.
The table below gives the pulley speed in each gear for each position of the
governor control; reference should always be made to this chart so that the
operating speed can be set as nearly as possible to that recommended by the
equipment manufacturer. When selecting governor and gear-change lever
positions to arrive at the correct driving speed, the aim should always be to
choose as high a gear ratio as possible, provided that the throttle is not fully
open when working under load. The use of a high gear will keep the engine
speed down to a minimum and so result in economical fuel consumption. 
						

							APRIL 1950104REAR POWER TAKE-OFF PULLEY R.P.M.
MAIN GEAR CHANGE LEVER IN:Governor
PositionEngine
Speed
FirstSecondThirdTop11500360525785107021650390575865118031800430630940128541950465680102013905210050073511051500622505407851180161072400570840125017158255061089013401820927006459451420193010285068099514902035113000715105015702145CAPSTAN WINCH. A capstan winch is available for use in conjunction
with the rear power take-off; it is mounted on the splined drive unit in place
of either the rear pulley or shaft guard.
The winch is designed for 2,500 lb. (1.135 Kg.) pull. It should be used with
the engine running at 600 R.P.M., i.e., a fast idling speed. The ratio of the
worm drive in the winch is 25:1, so providing the range of rope speeds
detailed below:-
CAPSTAN WINCH ROPE SPEEDS
MAIN GEAR CHANGE LEVER IN:FirstSecondThirdTopREAR POWER
TAKE-OFF
RATIOFt./
min.Metre
/min.Ft./
min.Metre
/min.Ft./
min.Metre
/min.Ft./
min.Metre
/min.5:68.02,511.83,617.55,324.07,36:511.53,514.44,425.17,634.510,5The drive should be engaged by means of the standard power take-off lever
on the gearbox with the engine at normal idling speed and without any load
on the rope.
A shear pin is used as the only connection between the bollard and the
winch drive shaft; this pin will break at the maximum permissible load on
the unit and so prevent over-loading. 
						

							APRIL 1950105Two spare pins are supplied with the winch; the correct part must always be
used for replacement purposes, as the transmission would be liable to
damage if a stronger pin were fitted.
Lubrication attention to this unit is most important. The filler plug on the
left of the winch casing is combined with a dipstick, and a drain plug is
fitted in the bottom of the casing. The oil level should be inspected at
intervals and topped up as necessary to the level mark on the dipstick. At
intervals of six months the unit should be completely drained and refilled
with fresh oil; the capacity is 3 pints (2 litres).
A grease nipple is provided for lubrication of the bollard shaft, access to
this being gained by turning the bollard until the hole provided is in line
with the nipple.
CHAFF GUARD. A fine-mesh chaff guard can be supplied as an extra
component to prevent the radiator becoming clogged when the vehicle is
used for farm work such as reaping, etc.
The guard is clamped behind the existing radiator grille by means of the
grille securing bolts.
ENGINE GOVERNOR. An engine governor can be supplied as extra
equipment; its use is essential when either the centre pulley or rear power
take-off pulley is utilised and it would also be found convenient for many
jobs necessitating use of the rear splined output shaft.
It is mounted on a bracket (B) affixed to the front of the thermostat housing
(Fig. 53) and is belt-driven from the front groove of the water pump and fan
pulley.
The two lower fixing holes (C) in the mounting bracket are slotted to allow
for belt adjustment; the tension is correct when it is possible to depress the
belt by thumb pressure approximately 1 in. (12 mm.) at a point midway
between the fan and governor pulley. Connection to the throttle linkage is
by rod (E) which is provided with a length adjustment (F) at the bell-crank
end. The link (D) connects the governor to the operating lever and quadrant
mounted on the scuttle panel below the instrument board. (Fig. 46).
The oil level in the governor should be checked occasionally by removing
the level plug from the right-hand front and the filler plug from the top front
of the casing; the correct level is to the bottom of the level hole.
Replenish as necessary by pouring in engine oil through the filler hole until
the level is correct; replace both plugs securely.
The quadrant has notches giving 12 positions for the operating lever. The
notch to the extreme right is for use when the governor is not required and
with the lever in this position the throttle opening is not influenced by the
governor mechanism. In order to bring the governor into operation, the
control lever must be moved into one of the remaining 11 notches; with