1999 LAND ROVER DISCOVERY check oil

AUTOMATIC GEARBOX - ZF4HP22 - 24
44-42 REPAIRS
Refit
1.Clean intermediate plate and mating faces with
a lint free cloth.
2.Position intermediate plate to converter
housing, fit bolts and tighten evenly to 46 Nm
(34 lbf.ft)
3.Fit new sealing washers to M14 Allen plugs, fit
plugs and tighten to 40 Nm (30 lbf.ft).
4.Fit new sealing washers to M20 plugs, fit plugs
and tighten to 50 Nm (37 lbf.ft).
5.Fit oil cooler adaptors and tighten to 42 Nm (30
lbf.ft)
6.Clean pump housing and mating face on
intermediate plate with lint free cloth.
7.Lubricate new 'O' ring with transmission fluid
and fit to pump housing.
8.Position pump locating dowel into intermediate
plate.
9.Align pump to dowel and position in
intermediate plate.
10.Fit bolts and tighten in a diagonal sequence to
10 Nm (7 lbf.ft)
11.Position LRT-44-003/1 into pump and check
that the pump rotors turn freely.
12.Fit intermediate plate gasket.

+ AUTOMATIC GEARBOX - ZF4HP22
- 24, REPAIRS, Gasket - intermediate plate.
M44 1342
LRT-44-003/1

AUTOMATIC GEARBOX - ZF4HP22 - 24
44-50 REPAIRS
Cooler - fluid - V8
$% 44.24.10
Remove
1. If fitted: Remove engine oil cooler.

+ ENGINE - V8, REPAIRS, Cooler -
engine oil.
2.Disconnect fluid temperature sensor multiplug.
3.Position absorbent cloth under each gearbox
cooler hose connection to collect spillage.
4.Push against coupling release ring and
disconnect both fluid hoses from cooler.
CAUTION: Always fit plugs to open
connections to prevent contamination.
5.Remove screw and release cooler from
radiator.
6.Carefully move radiator towards engine and
remove cooler.7.Remove temperature sensor and discard
sealing washer.
Refit
1.Use new sealing washer and tighten
temperature sensor to 14 Nm (10 lbf.ft).
2.Fit cooler, engage with radiator and secure with
screw.
3.Connect temperature sensor multiplug.
4.Ensure connections are clean and fit hoses to
cooler.
5. If fitted:Fit engine oil cooler.

+ ENGINE - V8, REPAIRS, Cooler -
engine oil.
6.Check and if necessary top up gearbox fluid.

REAR AXLE
51-2 DESCRIPTION AND OPERATION
Description
General
The rear axle consists of an axle casing with a differential unit attached to the right of the vehicle centre line. A wheel
hub is installed in each end of the axle casing and connected to the differential unit by a drive shaft.
Axle casing
The axle casing is of welded construction, with brackets on the casing exterior for attachment to the rear suspension.
A differential cover on the rear of the axle casing contains an oil level plug for checking and replenishment of the
differential unit lubricating oil. A magnetic drain plug is installed on the underside of the axle casing.
The interior of the axle casing is ventilated through a breather tube inserted in a red plastic sleeve in the top of the
casing. The open end of the breather tube is located between the chassis and the left rear wheelarch.
Differential unit
The differential unit is of the spiral bevel type, lubricated by splash oil. The unit consists of a differential carrier
attached to a pinion housing. In the pinion housing, the pinion is splined to a pinion flange which is secured with a bolt
and washer. An oil seal prevents leakage past the pinion flange.
Centralising peg
The centralising peg is a press fit in the centre of the pinion flange and provides a positive location for the rear
propellor shaft to ensure it is centralised with the flange.

REAR AXLE
51-8 REPAIRS
Refit
1.Clean pinion oil seal recess and pinion flange.
2.Lubricate oil seal lip with clean differential oil.

+ CAPACITIES, FLUIDS,
LUBRICANTS AND SEALANTS,
Lubrication.
3.Using tool LRT-51-010, fit pinion oil seal.
4.Fit pinion flange and securing bolt and washer.
Using tool LRT-51-003 to restrain pinion
flange, tighten pinion flange securing bolt to
100 Nm (74 lbf.ft).
5.Using a tubular drift, fit centralising peg to
pinion flange. Ensure that large diameter part of
centralising peg is below pinion flange
mounting surface.
6.Position propeller shaft and align reference
marks.
7.Fit nuts and bolts securing flexible coupling to
pinion flange and tighten to 76 Nm (55 lbf.ft).
8.Remove stand(s) and lower vehicle.
9.Check differential oil level.

+ MAINTENANCE, PROCEDURES,
Front and rear axle.
M51 0047A
LRT-51-003

REAR AXLE
51-12 OVERHAUL
Inspect
1.Clean and inspect all components for wear and
damage.
2.Fit planet gears and rotate to align cross shaft
holes.
3.Fit cross shaft, ensure roll pin hole is aligned.
4.Secure cross shaft with new roll pin.
5.Fit crown wheel to carrier, fit new bolts and
tighten to 60 Nm (44 lbf.ft).
6.Ensure original head bearing shim is clean and
free from burrs and fit under bearing race.
7.Ensure pinion bearing cup recesses are clean
and free of burrs and using LRT-51-018-4 fit
pinion head and tail bearing races.
8.Fit pinion head bearing to pinion.
9.Lubricate bearings with thin oil.
10.Ensure original tail bearing shim is clean and
free from burrs and fit under bearing race.
11.Fit pinion and pinion tail bearing.
12.Fit pinion flange, washer and bolt.
13.Use LRT-51-003 to restrain pinion flange.
14.Tighten pinion flange bolt to 100 Nm (74 lbf.ft).
15.Check pinion for end float. Should read zero.16.Rotate pinion several times to settle bearings,
check pinion Torque to Turn. Torque to Turn
should be recorded during pinion rotation.
Pinion Torque to Turn should be 4 to 6 Nm (3 to
4.5 lbf.ft).
17.Adjust size of tail bearing shim to obtain correct
pinion Torque to Turn (0.025 mm = 1 Nm
(0.001' = 0.7 lbf.ft) approximately).
18.Position LRT-51-018-7 on surface plate,
establish zero and reference DTI.
19.Ensure pinion height setting block, setting
gauge and mating faces are clean and free
from burrs.
20.Locate setting block LRT-51-018/11 over
pinion head, ensure it is fully seated in position.

REAR AXLE
OVERHAUL 51-13
21. Pinion height setting procedure:
l'A' = Nominal pinion height setting, 74.390.
l'B' = Setting block height.
l'C' = Head height setting.
l'C' = 'A' - 'B'. Subtract nominal pinion height
'A' from setting block height 'B' (on side of
setting block).
lExample: 74.390 - 73.130 = 1.26 mm
(2.929' - 2.88' = 0.049'). Therefore pinion
head height reading is 1.260 mm ± 0.025
mm (0.049' ± 0.001').
CAUTION: Setting block height must be
checked using figures on side of block.
22.Align setting gauge LRT-51-018/7 to setting
block, rock gauge to obtain minimum reading. If
reading is lower than required reading,
decrease shim size. If reading is higher than
required reading, increase shim size.
23.Using LRT-51-003 to restrain pinion flange,
remove bolt and washer. Remove pinion
flange.
24.Remove pinion, collect tail bearing and tail
bearing shim.
25.Remove pinion head bearing outer race and
shim. Discard shim. Ensure bearing race
recess is clean and free from burrs.26.Fit calculated shim, and using LRT-51-018/4 fit
head bearing outer race.
27.Fit pinion, pinion tail bearing and tail bearing
shim.
28.Fit pinion flange and bolt and washer. Using
LRT-51-003 to restrain pinion flange, tighten
bolt to 100 Nm (74 lbf.ft).
29.Rotate pinion in both directions to settle
bearings.
30.Recheck pinion Torque to Turn, adjust if
necessary.
31.Recheck pinion head height.
32.Using LRT-51-003 to restrain pinion flange,
remove bolt and washer. Remove pinion
flange.
33.Discard bolt.
34.Using LRT-51-010 fit pinion seal.
35.Ensure spacer and tail bearing are correctly
located.
36.Fit pinion, pinion flange and washer.
37.Fit new pinion flange bolt and tighten to 100 Nm
(74 lbf.ft).
38.Lightly oil differential bearings.
39.Ensure spring dowels are fitted in bearing caps.
40.Fit differential bearing outer races and locate
differential assembly into housing.
41.Fit bearing caps and tighten bolts to 10 Nm (7.5
lbf.ft).

FRONT AXLE
54-2 DESCRIPTION AND OPERATION
Description
General
The front axle consists of an axle casing with a differential unit attached to the right of the vehicle centre line. A wheel
hub is installed in a steering knuckle at each end of the axle casing and connected to the differential unit by a drive
shaft.
Axle casing
The axle casing is of welded construction, with brackets on the casing exterior for attachment to the front suspension.
Yokes at each end of the casing incorporate upper and lower ball joints for attachment of the steering knuckles.
A differential cover on the front of the axle casing contains an oil level plug for checking and replenishment of the
differential lubricating oil. A magnetic drain plug is installed on the underside of the casing. An oil seal is installed in
each end of the axle casing to prevent leakage past the drive shafts.
The interior of the axle casing is ventilated through a breather tube inserted in a red plastic sleeve in the top of the
casing. The open end of the breather tube is located in the left rear corner of the engine compartment.
Differential unit
The differential unit is of the spiral bevel type, lubricated by splash oil. The unit consists of a differential carrier
attached to a pinion housing. In the pinion housing, the pinion is splined to a drive flange which is secured with a bolt
and washer. An oil seal prevents leakage past the drive flange.
Steering knuckle
The steering knuckles are mounted on upper and lower ball joints in the yokes at the end of the axle casing. A tension
collet, in the lower mounting point of each steering knuckle, accommodates manufacturing tolerances to enable the
correct tightening of both ball joints. Lugs are incorporated on the steering knuckles for attachment of the steering
system drag link and track rod.

FRONT AXLE
54-8 REPAIRS
6.Using a suitable lever, remove pinion oil seal.
Take care to avoid damage to oil seal
recess.Refit
1.Clean pinion oil seal recess and pinion flange.
2.Lubricate pinion oil seal lip with clean
differential oil.

+ CAPACITIES, FLUIDS,
LUBRICANTS AND SEALANTS,
Lubrication.
3.Using LRT-51-010 , fit pinion oil seal.
4.Fit pinion flange and securing bolt and washer.
Using LRT- 51-003, restrain pinion flange and
tighten pinion flange bolt to 100 Nm (74 lbf.ft).
5.Position propeller shaft and align reference
marks. Fit nuts and bolts and tighten to 47 Nm
(35 lbf.ft).
6.Remove stand(s) and lower vehicle.
7.Check differential oil level.

+ MAINTENANCE, PROCEDURES,
Front and rear axle.