1996 LAND ROVER DEFENDER gearbox

TRANSFER GEARBOX
1
SPECIFICATIONS, TORQUE REV: 05/99 TORQUE VALUES
NOTE: Torque wrenches should be regularly checked for accuracy to ensure that all fixings are
tightened to the correct torque.
Nm
Transfer gearbox
Pinch bolt - operating arm to crank arm 9......................................................
End cover gear change housing 9.................................................................
Bottom cover to transfer case 25....................................................................
Front output housing to transfer case 25........................................................
Cross shaft housing to front output housing 25...............................................
Gear change housing 25.................................................................................
Pivot shaft to link arm 25.................................................................................
Connecting rod to adjustable clevis 25...........................................................
Anti-rotation plate intermediate shaft 25.........................................................
Front output housing cover 25........................................................................
Pivot bracket to extension housing 25............................................................
Finger housing to front output housing 25......................................................
Bearing housing to transfer case 25...............................................................
Brake drum to coupling flange 25...................................................................
Bearing housing cover to transfer gearbox 45................................................
Rear output speedometer housing to transfer gearbox 45..............................
Selector finger to cross shaft high/low 25.......................................................
Selector fork, high/low to shaft 25...................................................................
Transmission brake to speedometer housing 72............................................
Gate plate to grommet plate 9.......................................................................
Gearbox to transfer case 45...........................................................................
Oil drain plug 30..............................................................................................
Oil filler/level plug 30.......................................................................................
Differential case (front to rear) 60...................................................................
Output flanges 162...........................................................................................
Differential case rear stake nut 72..................................................................
Transfer breather 15.......................................................................................
Transfer box front drive flange to drive shaft 45..............................................
Transfer box rear drive flange to drive shaft 45..............................................
Transfer gearbox mounting brackets to chassis 30........................................
Mounting brackets to transfer gearbox 55......................................................
Mounting rubbers to mounting brackets 21.....................................................

PROPELLER SHAFTS
1
FAULT DIAGNOSIS VIBRATION HARSHNESS
Check that the propeller shaft universal joints and
sliding splines are not siezed or worn and that the
shafts are correctly aligned.
NOTE: In the event that both shafts are
satisfactory, but the vibration/harshness is
still present, the transfer box operation
and balance of the road wheels should be
checked.
For transfer box operation
See TRANSFER
GEARBOX, Fault diagnosis, Transfer Gearbox -
Oil seal locations
.
For balance of road wheels
See WHEELS AND
TYRES, Repair, Wheel Balancing.

BRAKES
1
DESCRIPTION AND OPERATION DESCRIPTION
The mechanical components of the hydraulic braking
system consists of four piston caliper disc brakes at
the front and two piston caliper disc brakes at the rear.
Vented front brake discs are fitted as standard on
110/130 models, while 90 models have solid discs.
However, on 90 models with a heavy duty chassis,
vented front discs may also be fitted.A cable controlled parking brake operates a single
drum brake mounted on the output shaft of the
transfer gearbox and is completely independent of the
main braking system.
The basic hydraulic system involves 2 separate and
independent primary and secondary circuits which
permits a degree of braking should a fault occur in
one of the circuits. The primary circuit operates the
rear brake calipers and the secondary circuit the front
brake calipers.
Master cylinder components
1.Secondary plunger
2.Secondary spring
3.Recuperation seal4.Primary spring
5.Recuperation seal
6.Primary plunger

74WHEELS AND TYRES
6
REPAIRREV: 05/99 WHEELS
Remove
WARNING: The parking brake acts on
transmission, not rear wheels, and may
not hold vehicle when jacking unless
following procedure is used. If one front wheel
and one rear wheel is raised no vehicle holding or
braking effect is possible. Wheels MUST be
chocked in all circumstances.
Apply parking brake, select a gear in main
gearbox and engage low gear in transfer box.
1.Loosen 5 wheel nuts.
2.Using a suitable trolley jack, raise vehicle and
place on axle stands
See INTRODUCTION,
Information, Jacking
.
3.Remove wheel nuts and carefully withdraw
wheel over studs.
Refit
4.Ensure that retaining studs and nuts are clean.
5.Alloy wheels: Lightly coat wheel mounting spigot
face with a suitable anti-seize compound to
minimise possibility of adhesion between wheel
and spigot face.
6.Refit wheel taking care not to damage stud
threads. (Do not apply oil).
7.Fit wheel nuts and turn by hand for at least three
full threads before using any form of wheel
wrench.
8.Tighten nuts as much as possible using a
suitable wrench.
9.Lower vehicle and finally tighten nuts to correct
torque sequence shown.
Alloy wheels -
130 Nm (96 lbf/ft)
Steel wheels -100 Nm (80 lbf/ft)
Heavy duty wheels -170 Nm (125 lbf/ft)

CHASSIS AND BODY
1
DESCRIPTION AND OPERATION CHASSIS AND BODY
Chassis
The chassis on all Defender variants are of the box
section, ladder type construction, manufactured from
2 mm (14swg) steel and treated with zinc phosphate,
cathodic electro coated, followed by waxing in the rear
crossmember.
Outriggers and angled brackets welded to the chassis
support suspension and axle components and are
also used as body mounting points. A detachable box
section crossmember, located between the two
chassis longitudinals is fitted to facilitate main gearbox
and tranfer box assembly removal.Should chassis damage occur, a comprehensive
range of components are available, including body
support outriggers, cross members and radius arm
mounting brackets. ALWAYS fit genuine parts that are
fully guaranteed and to original equipment
specification, fitted with Land Rover's BS 5135
welding standard.
Body
All body panels, with the exception of the fascia
bulkhead, are manufactured from aluminium alloy.
Galvanized steel is used for the front wheel arches to
give optimum protection. Most panels are also treated
with zinc phosphate and cathodic electro coated with
polyester surfacer, and are bolted to the welded
chassis.

WIPERS AND WASHERS
1
OVERHAUL WIPER MOTOR
Service repair no - 84.15.18.
Dismantle
1.Remove wiper motor from vehicle
See Repair,
Wiper motor and drive rack.
2.Remove wiper motor gearbox cover.
3.Remove circlip and plain washer securing
connecting rod.
4.Withdraw connecting rod.
5.Withdraw flat washer.
6.Remove circlip and washer securing shaft and
gear.
7.Clean any burrs from gear shaft and withdraw
gear.
8.Withdraw dished washer.
9.Add alignment marks to yoke and gearbox for
reassembly.
10.Remove yoke securing bolts.11.Withdraw yoke and armature.
12.Remove brush gear assembly.
13.Remove limit switch.
Inspection and test
14.Check brushes for excessive wear, if they are
worn to 4,8 mm in length, fit a new brush gear
assembly.
15.Using a push type gauge, check that brush
spring pressure is 140 to 200 g when bottom of
brush is level with bottom of slot in brush box. Fit
a new brush gear assembly if springs are not
satisfactory.
16.Test armature for insulation and open- or
short-circuits. Use a 110 V 15 W test lamp. Fit a
new armature if faulty.
17.Examine gear wheel for damage or excessive
wear.
Key to wiper motor components
1.Flexible drive
2.Gearbox cover
3.Connecting-rod retaining washer and circlip
4.Connecting-rod
5.Flat washer
6.Gear shaft retaining washer and circlip
7.Drive gear8.Dished washer
9.Alignment marks - yoke to body
10.Yoke securing bolts
11.Armature and yoke
12.Brush gear assembly
13.Limit switch

84WIPERS AND WASHERS
2
OVERHAUL Assemble
Use Ragosine Listate Grease to lubricate gear wheel
teeth, armature shaft worm gear, connecting rod and
pin, cable rack and wheelbox gear wheels.
Use Shell Turbo 41 oil sparingly to lubricate bearing
bushes, armature shaft bearing journals, gear wheel
shaft and wheelbox spindles. Thoroughly soak felt
washer in yoke bearing with oil.
18.Fit limit switch.
19.Fit brush gear assembly.
20.Fit armature and yoke to gearbox using
alignment marks, secure with yoke retaining
bolts tightening to
23 Nm (17 lbf/ft).If a
replacement armature is being fitted slacken
thrust screw to provide end-float for fitting yoke.
21.Fit dished washer beneath gear wheel with
concave side towards gear wheel.
22.Fit gear wheel to gearbox.
23.Secure gear wheel shaft with plain washer and
circlip.
24.Fit larger flat washer over crankpin.
25.Fit connecting rod and secure with smaller plain
washer and circlip.
26.Fit gearbox cover and secure with retaining
screws.
27.Connect electrical leads between wiper motor
and limit switch.
28.To adjust armature shaft end-float, hold yoke
vertically with adjuster screw uppermost.
Carefully screw in adjuster until resistance is felt,
then back-off one quarter turn.

ELECTRICAL
3
REPAIR ELECTRONIC CONTROL UNIT (ECU)
Service repair no - 86.55.85
Remove
1.Remove LH front seat cushion.
2.Release retaining clip and remove battery
access cover.
3.Slacken battery negative lead clamp bolt.
4.Turn starter switch 'on'.
5.Turn starter switch 'off' and remove key.
6.Disconnect battery negative lead.
NOTE: Operation 6 needs to be carried out
within 15 seconds to avoid activating
battery backed-up alarm sounder, if fitted.
7.Remove steering wheel
See STEERING,
Repair, Steering wheel.
8.Remove 4 screws securing instrument panel to
fascia cowl
See INSTRUMENTS, Repair,
Instrument panel.
9.Pull instrument panel away from fascia cowl and
disconnect speedometer cable, multi-plugs,
alarm LED plug lead, heated rear screen lead,
gearbox oil temperature lead and immobiliser
warning light leads.
10.Remove instrument panel.
11.Remove 2 screws securing ECU to fascia cowl
(LH drive shown). On RH drive vehicles ECU is
positioned lower down, on vertical face of fascia
panel.
12.Release ECU from fascia cowl and disconnect
both multi-plugs.
13.Remove ECU.
NOTE: A new ECU must be initialised
using TestBook.
Refit
14.Position ECU at fascia cowl and reconnect both
multi-plugs.
15.Locate ECU on mounting face of fascia cowl and
secure with 2 screws.
16.Position instrument panel to fascia cowl and
reconnect immobiliser warning light leads,
gearbox oil temperature lead, heated rear screen
lead, alarm LED plug lead, multi-plugs and
speedometer cable.
17.Secure instrument panel to fascia cowl with 4
screws
See INSTRUMENTS, Repair,
Instrument panel.
18.Fit steering wheelSee STEERING, Repair,
Steering wheel.
19.Reconnect battery negative lead.
20.Fit battery access cover.
21.Fit LH seat cushion.