power steering LAND ROVER DISCOVERY 1995 Workshop Manual

INTRODUCTION
7
INFORMATION DYNAMOMETER TESTING - VEHICLES WITH
ANTI-LOCK BRAKES (ABS)
WARNING: Do not attempt to test ABS
function on a dynamometer
Four wheel dynamometers
NOTE: Before testing a vehicle on a four
wheel dynamometer disconnect the valve
relay.
See Electrical Trouble Shooting
Manual.
The ABS function will not work, the ABS warning
light will illuminate. Normal braking will be
available.
Provided that front and rear rollers are rotating at
identical speeds and that normal workshop safety
standards are applied, there is no speed restriction
during testing except any that may apply to the tyres.
Two wheel dynamometers
IMPORTANT: Use a four wheel dynamometer for
brake testing if possible.
NOTE: ABS will not function on a two
wheel dynamometer. The ABS light will
illuminate during testing. Normal braking
will be available.
If brake testing on a single rig is necessary it must be
carried out with propeller shaft to the rear axle
removed, AND neutral selected in BOTH main and
transfer boxes.
If checking engine performance, the transfer box must
be in high range and drive shaft to stationary axle
removed.
TOWING
CAUTION: The vehicle has permanent
four-wheel drive. The following towing
instructions must be adhered to:
Towing the vehicle on all four wheels with driver
operating steering and brakes.
1.Turn ignition key turn to position '1' to release
steering lock.
2.Select neutral in main gearbox and transfer
gearbox.
3.Secure tow rope, chain or cable to towing eye.
4.Release the parking brake.
CAUTION: The brake servo and power
assisted steering system will not be
functional without the engine running.
Greater pedal pressure will be required to apply
the brakes, the steering system will require
greater effort to turn the front road wheels.
The vehicle tow connection should be used only
in normal road conditions, 'snatch' recovery
should be avoided.
Suspended tow by breakdown vehicle
CAUTION: To prevent vehicle damage,
front or rear propeller shaft MUST BE
removed, dependent upon which axle is
being trailed.
1.Mark propeller shaft drive flanges at transfer
gearbox and axles with identification lines to
enable the propeller shaft to be refitted in its
original position.
2.Remove the propeller shaft fixings, remove the
shaft from the vehicle.
3.If the front axle is to be trailed turn ignition key to
position '1' to release steering lock.
CAUTION: The steering wheel and/or
linkage must be secured in a straight
ahead position. DO NOT use the steering
lock mechanism for this purpose.

01INTRODUCTION
10
INFORMATION ABBREVIATIONS AND SYMBOLS USED IN THIS
MANUAL
Across flats (bolt size) AF............................................
After bottom dead centre ABDC...................................
After top dead centre ATDC.........................................
Alternating current a.c..................................................
Ampere amp................................................................
Ampere hour amp hr....................................................
Before bottom dead centre BBDC................................
Before top dead centre BTDC......................................
Bottom dead centre BDC.............................................
Brake horse power bhp................................................
British Standards BS....................................................
Carbon monoxide CO..................................................
Centimetre cm.............................................................
Centigrade (Celsius) C................................................
Cubic centimetre cm
3...................................................
Cubic inch in3...............................................................
Degree (angle) deg or° ...............................................
Degree (temperature) deg or° .....................................
Diameter dia................................................................
Direct current d.c..........................................................
Electronic Control Unit ECU........................................
Electronic Fuel Injection EFI........................................
Fahrenheit F.................................................................
Feet ft...........................................................................
Feet per minute ft/min..................................................
Fifth 5th........................................................................
First 1st........................................................................
Fluid ounce fl oz..........................................................
Foot pounds (torque) lbf ft............................................
Fourth 4th.....................................................................
Gramme (force) gf........................................................
Gramme (mass) g........................................................
Gallons gal...................................................................
Gallons (US) US gal.....................................................
High tension (electrical) H.T.........................................
Internal diameter I.D....................................................
Inches of mercury in. Hg..............................................
Inches in......................................................................
Kilogramme (force) kgf.................................................
Kilogramme (mass.) kg................................................
Kilogramme centimetre (torque) kgf.cm.......................
Kilogramme per square millimetre kgf/mm
2.................
Kilogramme per square centimetre kgf/cm2.................
Kilogramme metres (torque) kgf.m..............................
Kilometres km..............................................................
Kilometres per hour km/h.............................................
Kilovolts kV...................................................................
Left-hand LH................................................................
Left-hand steering LHStg.............................................
Left-hand thread LHThd...............................................
Litres litre.....................................................................Low tension l.t..............................................................
Maximum max.............................................................
Metre m........................................................................
Millilitre ml....................................................................
Millimetre mm...............................................................
Miles per gallon mpg....................................................
Miles per hour mph......................................................
Minute (angle) '............................................................
Minus (of tolerance) -...................................................
Negative (electrical) -...................................................
Newton metres (torque) Nm........................................
Number No..................................................................
Ohms ohm...................................................................
Ounces (force) ozf.......................................................
Ounces (mass) oz........................................................
Ounce inch (torque) ozf.in...........................................
Outside diameter O.D..................................................
Part number Part No....................................................
Percentage %...............................................................
Pints pt.........................................................................
Pints (US) US pt...........................................................
Plus (tolerance) +.........................................................
Positive (electrical) +....................................................
Pound (force) lbf..........................................................
Pounds inch (torque) in.lbf...........................................
Pound (mass) lb...........................................................
Pounds per square inch P.S.I......................................
Ratio :...........................................................................
Reference ref...............................................................
Revolution per minute rev/min.....................................
Right-hand RH.............................................................
Second (angle) "...........................................................
Second (numerical order) 2nd......................................
Specific gravity sp.gr....................................................
Square centimetres cm
2...............................................
Square inches in2.........................................................
Standard wire gauge s.w.g..........................................
Synchroniser/Synchromesh synchro...........................
Third 3rd.......................................................................
Top dead centre TDC..................................................
United Kingdom UK......................................................
Vehicle Identification Number VIN...............................
Volts V.........................................................................
Watts W.......................................................................
SCREW THREADS
American Standard Taper Pipe NPTF.........................
British Standard Pipe BSP...........................................
Unified Coarse UNC....................................................
Unified Fine UNF.........................................................

04GENERAL SPECIFICATION DATA
10
INFORMATION COOLING SYSTEM 3.9 V8i
System type Pressurised, spill return, thermostatically controlled.....................................................................
water and anti-freeze mixture. Pump assisted thermo
syphon. Coolant radiator combined with oil cooler.
Fan and viscous coupling assembly 11 blade axial flow 433mm diameter.................................
Pump type Centifugal, impellor, belt driven.........................................................................
Thermostat opening 88 degrees..........................................................
Expansion tank cap pressure 15 p.s.i. (system pressure)............................................
STEERING
Power steering box
Make/type Adwest Varamatic - worm and roller box........................................................................
Ratio Variable: straight ahead 19.3:1 on lock 14.3:1.................................................................................
Steering wheel turns, lock-to-lock 3.375....................................
Steering pump
Make/type -V8i ZF - Unicorn.................................................................
Make/type - Mpi & Tdi Hobourn-Eaton series 500......................................................
Steering geometry
Steering wheel diameter 405mm..................................................
Steering wheel diameter airbag model 400mm.............................
Toe-out measurement 0 to 2mm toe out......................................................
Toe-out included angle 0Ê to 0Ê 16'.....................................................
Camber angle 0Ê.................................................................. Check with vehicle in static..............
unladen condition, that is, vehicle
with water,
Castor angle 3Ê..................................................................... oil and five gallons of fuel. Rock..............
the vehicle up and down at the
front to allow
Swivel pin inclination static 7Ê............................................... it to take up a position..............

GENERAL FITTING REMINDERS
5
INFORMATION JOINTS AND JOINT FACES
1.Always use correct gaskets where they are
specified.
2.Use jointing compound only when
recommended. Otherwise fit joints dry.
3.When jointing compound is used, apply in a thin
uniform film to metal surfaces; take great care to
prevent it from entering oilways, pipes or blind
tapped holes.
4.Remove all traces of old jointing materials prior
to reassembly. Do not use a tool which could
damage joint faces.
5.Inspect joint faces for scratches or burrs and
remove with a fine file or oil stone; do not allow
removed material or dirt to enter tapped holes or
enclosed parts.
6.Blow out any pipes, channels or crevices with
compressed air, fit new 'O' rings or seals
displaced by air blast.FLEXIBLE HYDRAULIC PIPES, HOSES
1.Before removing any brake or power steering
hose, clean end fittings and area surrounding
them as thoroughly as possible.
2.Obtain appropriate plugs or caps before
detaching hose end fittings, so that ports can be
immediately covered to exclude dirt.
3.Clean hose externally and blow through with
airline. Examine carefully for cracks, separation
of plies, security of end fittings and external
damage. Reject any hose found faulty.
4.When refitting hose, ensure that no unnecessary
bends are introduced, and that hose is not
twisted before or during tightening of union nuts.
5.Containers for hydraulic fluid must be kept
absolutely clean.
6.Do not store brake fluid in an unsealed
container. It will absorb water, and fluid in this
condition would be dangerous to use due to a
lowering of its boiling point.
7.Do not allow brake fluid to be contaminated with
mineral oil, or use a container which has
previously contained mineral oil.
8.Do not re-use brake fluid bled from system.
9.Always use clean brake fluid to clean hydraulic
components.
10.Fit a cap to seal a hydraulic union and a plug to
its socket after removal to prevent ingress of dirt.
11.Absolute cleanliness must be observed with
hydraulic components at all times.
12.After any work on hydraulic systems, inspect
carefully for leaks underneath the vehicle while a
second operator applies maximum pressure to
the brakes (engine running) and operates the
steering.

LUBRICANTS, FLUIDS AND CAPACITIES
1
INFORMATION RECOMMENDED LUBRICANTS AND FLUIDS -
USA VEHICLES
AMBIENT TEMPERATURE°C
COMPONENT SPECIFICATION VISCOSITY -30 -20 -10 0 10 20 30 40 50
Engine Use oils to API 5W/20 )
service level
SGSH 5W/30 )
or 5W/40 )
RES.22.OL.G4
or
CCMC G4 10W/30
10W/40 )
10W/50 )
15W/40 )
15W/50 )
20W/40 )
20W/50 )
Automatic gearbox ATF Dexron IID
Final drive units API or GL5 90 EP
Swivel pin housings MIL - L - 2105 or
MIL - L - 2105B, C
or D 80W EP
Power steering ATF Dexron IID
LT 230T API GL4 or GL5
transfer gearbox MIL - L - 2105 or
MIL - L - 2105B
Brake reservoir Brake fluid must have a minimum
boiling point of 260°C (500ÊF) and
comply with FMVSS/116/DOT 4
Lubrication nipples
(hubs, ball joints,
etc.)NLGI-2 multipurpose lithium based
grease
See table on page 3 for remaining vehicle components

09LUBRICANTS, FLUIDS AND CAPACITIES
2
INFORMATION RECOMMENDED LUBRICANTS AND FLUIDS
All climates and conditions
AMBIENT TEMPERATURE°C
COMPONENT SPECIFICATION VISCOSITY -30 -20 -10 0 10 20 30 40 50
Petrol modelsOils must meet: 5W/30
Engine sump
RES.22.OL.G-4 5W/40
or 5W/50
CCMC G-4 or 10W/30
API SG or SH 10W/40
10W/50
15W/40
15W/50
20W/40
20W/50
25W/40
25W/50
DieselRES.22.OL.PD-2 15W/40
Engine sump or CCMC PD-2
or API CD
Main Gearbox
AutomaticATF Dexron IID
Main Gearbox
manualATF Dexron IID
Final drive units API or GL5 90 EP
Swivel pin housings MIL - L - 2105 or
MIL - L - 2105B 80 EP
CorD
Power steering ATF Dexron IID
Transfer box API GL4 or GL5 90 EP
LT230T MIL - L - 2105 or
MIL - L - 2105B 80 EP
CorD

09LUBRICANTS, FLUIDS AND CAPACITIES
4
INFORMATION CAPACITIES
The following capacity figures are approximate and are provided as a guide only.
Capacities (approx.)* Litres Imp.Unit US unit
Engine sump oil
- 300Tdi models 5,8...................................................... 10.20 pt 12.30 pt
- V8i petrol models 3.9 6,1............................................ 10.70 pt 12.90 pt
- Mpi petrol models 4,90.................................................. 8.70 pt 10.40 pt
Extra when refilling after fitting new filter
- 300Tdi models 0,85...................................................... 1.50 pt 1.80 pt
- V8i petrol models 0,56.................................................. 1.00 pt 1.20 pt
- Mpi 0,4........................................................................ 0.70 pt 0.85 pt
Manual gearbox 2,67............................................................... 4.70 pt 5.70 pt
Automatic gearbox 9,1........................................................... 16.00 pt 19.20 pt
Transfer gearbox oil 2,30......................................................... 4.00 pt 4.90 pt
Front differential 1,70............................................................... 3.00 pt 3.60 pt
Rear differential 1,70................................................................ 3.00 pt 3.60 pt
Power steering box and reservoir LHD 2,90............................ 5.00 pt 6.00 pt
Power steering box and reservoir RHD 3,40............................ 6.00 pt 7.20 pt
Swivel pin housing oil (each) 0,35............................................ 0.60 pt 0.75 pt
Fuel tank usable fuel 89,0........................................................ 19.5 gall 23 gall
Cooling system
- 300Tdi models 11,50...................................................... 20.20 pt 24.30 pt
- V8i petrol models 11,30.................................................. 20.00 pt 23.90 pt
- Mpi 10,00........................................................................ 17.60 pt 21.00 pt
Washer bottle 7,0................................................................... 12.30 pt 14.80 pt
NOTE: * All levels must be checked by dipstick or level plugs as applicable. When draining oil
from the ZF automatic gearbox, oil will remain in the torque converter, refill to high level on
dipstick only.

10MAINTENANCE
10
MAINTENANCE
CHECK/TOP UP COOLING SYSTEM
1.To prevent corrosion of aluminium alloy engine
parts it is imperative that cooling system is filled
with a solution of water and phosphate free
anti-freeze, winter or summer. Never fill or top up
with plain water.
WARNING: Do not remove filler cap when
engine is hot because cooling system is
pressurised and personal scalding could
result.
2.When removing filler cap, turn cap slowly
anti-clockwise, pause and allow all pressure to
escape.
3.Continue to turn until cap is removed.
4.When engine is cold expansion tank coolant
should be level with top of indicator post, visible
inside tank through filler hole.
5.If necessary, top up cooling system with
premixed coolant. Use soft water whenever
possible, if local water supply is hard, rainwater
should be used.
6.When replacing filler cap it is important that it is
tightened down fully. Failure to tighten filler cap
properly may result in water loss, with possible
damage to engine
The cooling system should be drained and flushed at
2 year intervals or at onset of second winter. Refer to
Coolant Requirements.
See COOLING SYSTEM,
Adjustment, Coolant RequirementsCHECK/ TOP UP POWER STEERING FLUID
RESERVOIR
1.Remove fluid reservoir cap. Check that fluid is
up to high mark on dipstick.
CHECK/ TOP UP CLUTCH AND BRAKE FLUID
RESERVOIRS
CAUTION: Brake fluid can damage
paintwork. If spillage occurs, wash
affected area IMMEDIATELY with a large
quantity of water.
CHECK/TOP UP WASHER RESERVOIR
Top up washer reservoir to within 25 mm of filler neck.
Use a screen washer solvent/anti-freeze solution to
assist removing mud, flies and road film and protect
against freezing.
LUBRICATE ACCELERATOR AND CRUISE
CONTROL LINKAGES
CHECK/ADJUST IGNITION TIMING - V8i
CATALYST
Check ignition timing.See ENGINE TUNING
DATA, Information, Engine 3.9 V8i

MAINTENANCE
11
MAINTENANCE
CHECK/ADJUST ENGINE IDLE SPEED - Tdi
For idle speed.See ENGINE TUNING DATA,
Information, 300 Tdi Engine
CHECK ENGINE IDLE SPEED - Mpi
For idle speed.See ENGINE TUNING DATA,
Information, Engine - Mpi - 2.0 Litre
CHECK/ADJUST STEERING BOX V8i - Tdi - Mpi
Check steering box for fluid leaks.
Check that there is no backlash in steering box in
straight ahead position. Adjust steering box if
necessary.
See STEERING, Adjustment, Power
Steering Box
CLEAN BATTERY CONNECTIONS
NOTE: Some 96 models are fitted with
battery backed-up sounder
See
ELECTRICAL, Repair, Battery
Remove battery terminals, clean and coat with
petroleum jelly.
A low maintenance battery is installed in vehicle.
Dependent upon climate conditions electrolyte levels
should be checked as follows:
Temperate climates every three years.
Hot climates every year.
RENEW CAMSHAFT DRIVE BELT - Tdi
Renew camshaft drive belt.See ENGINE, Repair,
Camshaft Drive Belt and Gears
The engine timing gears are driven by a flexible
rubber belt which must be renewed at intervals
determined by the severity of operating conditions.
In reasonable, temperate climate operation, renew the
belt every 120,000 km (72,000 miles) or every 6 years
whichever occurs earlier.
In adverse operating conditions such as work in dusty
atmospheres, high ambient temperatures and desert
and tropical zones, renew the belt every 60,000 km
(36,000 miles) or every 3 years whichever occurs
earlier.
CAUTION: If the drive belt is not renewed
at the correct interval, it could fail,
resulting in serious damage.
RENEW CAMSHAFT DRIVE BELT - Mpi
Renew every 160,000 km (96,000 miles) or every 6
years. In adverse conditions every 80,000 km (48,000
miles).
For details of renewing camshaft drive belt.
See
ENGINE, Repair, Camshaft Drive Belt - Mpi
CHECK CAMSHAFT DRIVE BELT - Mpi
For details of checking camshaft drive belt.See
ENGINE, Repair, Check Camshaft Drive Belt - Mpi

10MAINTENANCE
16
MAINTENANCE
LUBRICATE PROPELLER SHAFT SLIDING , AND
UNIVERSAL JOINTS
1.Clean all grease nipples on front and rear
propeller shafts.
2.Using a low pressure hand grease gun, apply
recommended grease, to grease nipples at front
and rear propeller shaft universal and sliding
joints.
NOTE: The rear propeller shaft flexible
coupling is not fitted with a grease nipple.
CHECK VISUALLY BRAKE, FUEL, CLUTCH
PIPES/UNIONS FOR CHAFING LEAKS AND
CORROSION
CHECK EXHAUST SYSTEM FOR LEAKS,
SECURITY AND DAMAGE
CHECK FOR FLUID LEAKS FROM POWER
STEERING AND SUSPENSION SYSTEMS,
HYDRAULIC PIPES AND UNIONS FOR CHAFING
AND CORROSION
CHECK/TIGHTEN STEERING UNIT AND STEERING
ROD BALL JOINT FIXINGS, CHECK CONDITION
OF OF BALL JOINTS AND DUST COVERS
Ball joints are lubricated for their normal life during
manufacture and require no further lubrication. This
applies ONLY if rubber boot has not been dislodged
or damaged. Joints should be checked at specified
mileage intervals but more frequently if vehicle is used
under arduous conditions.
1.Check for wear in joints by moving ball joint up
and down vigorously. If free movement is
apparent fit a new joint assembly.