torque LAND ROVER DISCOVERY 2002 Workshop Manual

CONTENTS
2CONTENTS
IDENTIFICATION NUMBERS .................................................................. 05-1
Vehicle Identification Number ......................................................................................................... 05-1
Identification Number Locations ..................................................................................................... 05-3
TORQUE WRENCH SETTINGS .............................................................. 06-1
Maintenance ................................................................................................................................... 06-1
Engine Td5 ..................................................................................................................................... 06-2
Engine V8 ....................................................................................................................................... 06-4
Emission control - Td5 .................................................................................................................... 06-5
Emission control - V8 ...................................................................................................................... 06-5
Engine management system - Td5 ................................................................................................. 06-5
Engine management system - V8................................................................................................... 06-6
Cooling system ............................................................................................................................... 06-6
Manifolds and exhaust systems - Td5 ............................................................................................ 06-6
Manifolds and exhaust systems - V8 .............................................................................................. 06-7
Clutch.............................................................................................................................................. 06-7
Manual gearbox - R380 .................................................................................................................. 06-8
Transfer box - LT230SE ................................................................................................................. 06-8
Automatic gearbox - ZF4HP22/24 .................................................................................................. 06-9
Propeller shafts ............................................................................................................................... 06-9
Axles ............................................................................................................................................... 06-9
Steering .......................................................................................................................................... 06-10
Front suspension ............................................................................................................................ 06-11
Rear suspension ............................................................................................................................. 06-12
Brakes............................................................................................................................................. 06-12
Restraint systems ........................................................................................................................... 06-13
Body................................................................................................................................................ 06-14
Heating and air conditioning ........................................................................................................... 06-15
Wipers and washers ....................................................................................................................... 06-15
Electrical ......................................................................................................................................... 06-15
LIFTING AND TOWING ........................................................................... 08-1
LIFTING .......................................................................................................................................... 08-1
TOWING ......................................................................................................................................... 08-2
TRANSPORTING ........................................................................................................................... 08-3
CAPACITIES, FLUIDS AND LUBRICANTS ............................................ 09-1
Capacities ....................................................................................................................................... 09-1
Fluids .............................................................................................................................................. 09-2
Anti-Freeze Concentration .............................................................................................................. 09-3
Lubrication ...................................................................................................................................... 09-3
MAINTENANCE ........................................................................................ 10-1
PROCEDURES
V8 engine underbonnet view .......................................................................................................... 10-1
Diesel underbonnet view ................................................................................................................ 10-2
Seats and seat belts ...................................................................................................................... 10-3
Lamps, horns and warning indicators ........................................................................................... 10-5
Wipers and washers ...................................................................................................................... 10-5
Handbrake .................................................................................................................................. 10-6

CONTENTS
12 CONTENTS
Operation ........................................................................................................................................ 41-19
ADJUSTMENTS
Cable - high/low selector ................................................................................................................ 41-21
REPAIRS
Bottom cover - transfer box ......................................................................................................... 41-23
Transfer box - Diesel ...................................................................................................................... 41-24
Transfer box - V8 ............................................................................................................................ 41-27
Gasket - rear cover plate ................................................................................................................ 41-30
Switch - differential lock - Up to 03 MY ........................................................................................... 41-30
Cable - high/low selector ................................................................................................................ 41-31
Oil seal - input shaft ...................................................................................................................... 41-32
Seal - front output shaft .................................................................................................................. 41-33
Seal - rear output shaft ................................................................................................................... 41-34
Gasket - rear output shaft housing ................................................................................................. 41-35
Solenoid - interlock - Up to 03 MY .................................................................................................. 41-36
Sensor - neutral ........................................................................................................................... 41-36
Sensor - oil temperature ................................................................................................................ 41-37
Switch - high low - warning ........................................................................................................... 41-37
OVERHAUL
Intermediate gear assembly ......................................................................................................... 41-39
Differential assembly ................................................................................................................... 41-42
Dog clutch - differential lock .......................................................................................................... 41-57
Input gear/bearing .......................................................................................................................... 41-60
Low gear - differential ................................................................................................................... 41-62
AUTOMATIC GEARBOX - ZF4HP22 - 24 ................................................ 44-1
DESCRIPTION AND OPERATION
Automatic gearbox component layout ............................................................................................ 44-1
Control schematic ........................................................................................................................... 44-2
Description ...................................................................................................................................... 44-4
Operation ........................................................................................................................................ 44-17
ADJUSTMENTS
Cable - selector ............................................................................................................................. 44-21
Stall test .......................................................................................................................................... 44-21
REPAIRS
Cable and lever assembly - selector .............................................................................................. 44-23
Selector indicator .......................................................................................................................... 44-24
Switch - starter inhibitor ................................................................................................................. 44-24
Seal - selector shaft ........................................................................................................................ 44-25
Gearbox - convertor and transfer gearbox - Diesel ....................................................................... 44-26
Gearbox - convertor and transfer gearbox - V8 ............................................................................ 44-30
Torque converter and oil seal ......................................................................................................... 44-34
Housing - torque converter ............................................................................................................ 44-35
Gasket - intermediate plate ............................................................................................................ 44-37
Intermediate plate .......................................................................................................................... 44-38
Pump - fluid .................................................................................................................................... 44-40
Seal - rear extension housing ......................................................................................................... 44-41
Gasket - rear extension housing. .................................................................................................. 44-42
Parking pawl assembly. ................................................................................................................ 44-43
Gasket - oil sump ........................................................................................................................... 44-44
Filter - oil ........................................................................................................................................ 44-45
Cooler - fluid - Td5 .......................................................................................................................... 44-45

INTRODUCTION
01-1
INTRODUCTION
How To Use This Manual
General
To assist in the use of this Manual, it is divided into
sections and sub-sections. The section title is given
at the top of each page and the relevant sub-section
is given at the bottom.
There is a single contents section at the front of the
Manual, which is divided by section and sub-section.
Each section is numbered from page 1.
The individual items comprising repair operations are
to be followed in the sequence in which they appear.
Items numbers in the illustration are referred to in the
text.
Adjustment and Repair operations include reference
to Service tool numbers and the associated
illustration depicts the tool in use. Adjustment and
repair operations also include reference to wear
limits, relevant data, torque figures, and specialist
information and useful assembly details. Each
adjustment or repair operation is given its Service
Repair Operation number.
WARNINGS, CAUTIONS and NOTES have the
following meanings:
WARNING: Procedures which must be followed
precisely to avoid the possibility of injury.
CAUTION: Calls attention to procedures which
must be followed to avoid damage to
components.
NOTE: Gives helpful information.
References
References to the LH or RH side given in this Manual
are made when viewing the vehicle from the rear.
With the engine and gearbox assembly removed, the
crankshaft pulley end of the engine is referred to as
the front.
Operations covered in this Manual do not include
reference to testing the vehicle after repair. It is
essential that work is inspected and tested after
completion and if necessary a road test of the vehicle
is carried out particularly where safety related items
are concerned.
Dimensions
The dimensions quoted are to design engineering
specification with Service limits where applicable.
Repairs and Replacements
When replacement parts are required it is essential
that only Land Rover recommended parts are used.
Attention is particularly drawn to the following points
concerning repairs and the fitting of replacement
parts and accessories.
Safety features and corrosion prevention treatments
embodied in the vehicle may be impaired if other
than Land Rover recommended parts are fitted. In
certain territories, legislation prohibits the fitting of
parts not to the manufacturer's specification. Torque
wrench setting figures given in this Manual must be
used. Locking devices, where specified, must be
fitted. If the efficiency of a locking device is impaired
during removal it must be renewed.
Owners purchasing accessories while travelling
abroad should ensure that the accessory and its
fitted location on the car conform to legal
requirements.
The Terms of the vehicle Warranty may be
invalidated by the fitting of parts other than Land
Rover recommended parts.
All Land Rover recommended parts have the full
backing of the vehicle Warranty.
Land Rover Dealers are obliged to supply only Land
Rover recommended parts.

GENERAL INFORMATION
03-10
Split pins
Always fit new split-pins of the correct size for the
hole in the bolt or stud.
Screw Threads
General
Metric threads to ISO standards are used.
Damaged nuts, bolts and screws must always be
discarded. Cleaning damaged threads with a die or
tap impairs the strength and fit of the threads and is
not recommended.
Always ensure that replacement bolts are at least
equal in strength to those replaced. Castellated nuts
must not be loosened to accept a split-pin, except in
recommended cases when this forms part of an
adjustment.
Do not allow oil or grease to enter blind threaded
holes. The hydraulic action on screwing in the bolt or
stud could split the housing.
Always tighten a nut or bolt to the recommended
torque figure. Damaged or corroded threads can
affect the torque reading.
To check or re-tighten a bolt or screw to a specified
torque figure, first loosen a quarter of a turn, then
retighten to the correct torque figure.
Oil thread lightly before tightening to ensure a free
running thread, except in the case of threads treated
with sealant/lubricant, and self-locking nuts.

GENERAL INFORMATION
03-20
Storage
Airbag modules and seat belt pretensioners are
classed as explosive devices. For overnight and
longer term storage, they must be stored in a secure
steel cabinet which has been approved as suitable
for the purpose and has been registered by the local
authority.
For the temporary storage of an airbag module or
seat belt pretensioner during service, place in a
designated storage area. If there is no designated
storage area available, store in the luggage
compartment of the vehicle and inform the workshop
supervisor. Always observe the following
precautions when temporarily storing an airbag
module:
lEnsure the cover is facing upwards and the
luggage compartment is secured.
lAlways keep components cool, dry and free
from contamination.
lDo not allow anything to rest on the airbag
module.
lStore any removed airbag assembly on a
secure flat surface away from electrical
equipment and heat sources exceeding 85
°C
(185
°F).
WARNING: Store the airbag module or seat belt
pre-tensioner in a designated storage area. If
there is no designated storage area available,
store in the locked luggage compartment/
loadspace of the vehicle and inform the
workshop supervisor.Installation and testing precautions
The integrity of SRS system components are critical
for safety reasons. Ensure the following precautions
are always adhered to:
lNever install used SRS components from
another vehicle or attempt to repair an SRS
component.
lWhen repairing an SRS system, only use
genuine new parts.
lNever apply electrical power to an SRS
component unless instructed to do so as part of
an approved test procedure.
lSpecial Torx bolts are necessary for installing
the airbag assembly. Do not use other bolts.
Ensure bolts are tightened to the specified
torque.
lEnsure that SRS component fixings are
correctly positioned and torqued during service
and repair.
lAlways use new fixings when replacing an SRS
component.
lEnsure the airbag DCU is always installed
correctly. There must not be any gap between
the DCU and the bracket to which it is mounted.
An incorrectly mounted unit could cause the
system to malfunction.
lThe airbag DCU is a non-serviceable
component and no attempt should be made to
repair or modify the unit.
lDo not try to disassemble the airbag assembly.
It has no serviceable parts. Once an airbag has
been deployed, it cannot be repaired or reused.
lIf you suspect an airbag assembly could be
defective, install a new unit and dispose of the
old unit. Manually deploy the old unit before
disposal.
WARNING: Keep clear of the deployment zone
when working on or near an airbag module.
Accidental deployment could cause serious
injury.

GENERAL INFORMATION
03-24
Air Conditioning System Precautions
General
The air conditioning system contains fluids and
components which could be potentially hazardous to
the service engineer or the environment if not
serviced and handled correctly. The following
guidelines are intended to alert the service engineer
to potential sources of danger and emphasise the
importance of ensuring the integrity of the Air
Conditioning operating conditions and components
fitted to the vehicle.
Where necessary, additional specific precautions are
detailed in the relevant sections of this Manual which
should be referred to prior to commencing repair
operations.
The refrigerant used in the air conditioning system is
HFC-134a (Hydrofluorocarbon) R134a.
WARNING: Servicing must only be carried out by
personnel familiar with both the vehicle system
and the charging and testing equipment. All
operations must be carried out in a well
ventilated area away from open flame and heat
sources.
WARNING: R134a is a hazardous liquid and when
handled incorrectly can cause serious injury.
Suitable protective clothing, consisting of face
protection, heat proof gloves, rubber boots and
rubber apron or waterproof overalls, must be
worn when carrying out operations on the air
conditioning system.
Remedial actions
If an accident involving R134a should occur, conduct
the following remedial actions:
lIf liquid R134a enters the eye, do not rub it.
Gently run large quantities of eye wash over
affected eye to raise the temperature. If an eye
wash is not available, cool, clean water may be
used to flush the eye. After rinsing, cover the
eye with a clean pad and seek immediate
medical attention.lIf liquid R134a is splashed onto the skin, run
large quantities of water over the affected area
to raise the temperature. Implement the same
action if the skin comes in contact with
discharging cylinders. Wrap the contaminated
body parts in blankets (or similar materials) and
seek immediate medical attention.
lIf the debilitating effects of inhalation of R134a
vapour is suspected, seek fresh air. If the
affected person is unconscious, move them
away from the contaminated area to fresh air
and apply artificial respiration and/or oxygen
and seek immediate medical attention.
WARNING: Due to its low evaporating
temperature, R134a must be handled with care.
R134a splashed on any part of the body will
cause immediate freezing of that area. Also,
refrigerant cylinders and replenishment trolleys
when discharging will freeze skin to them if
contact is made.
Service precautions
Observe the following precautions when handling
components used in the air conditioning system:
lAir conditioning units must not be lifted by their
hoses, pipes or capillary lines.
lHoses and lines must not be subjected to any
twist or stress; the efficiency of the system will
be impaired by kinks or restrictions. Ensure that
hoses are correctly positioned before tightening
couplings, and ensure that all clips and supports
are utilised.
lFlexible hoses should not be positioned close to
the exhaust manifold (less than 100mm) unless
protected by heat shielding.
lCompleted assemblies must be checked for
refrigeration lines touching metal panels. Any
direct contact of components and panels may
transmit noise and so must be eliminated.
lThe appropriate torque wrench must be used
when tightening refrigerant connections to the
stipulated value. An additional spanner must be
used to hold the union to prevent twisting of the
pipe when tightening connections.
lBefore connecting any hose or pipe, ensure that
refrigerant oil is applied to the seat of the new 'O'
rings, BUT NOT to the threads of the
connection.
lAll protective plugs must remain in place to seal
the component until immediately prior to
connection.
lEnsure components are at room temperature
before uncapping, to prevent condensation of
moisture from the air that enters it.

GENERAL DATA
04-13
Transfer box - LT230SE
Automatic gearbox - ZF4HP22/24
Rear axle
Front axle
Type LT230SE, two speed reduction with front and rear drives
Reduction ratios:

High range 1.211 : 1

Low range 3.32 : 1
Low range gear to high/low range hub clearance 0.05 to 0.15 mm (0.002 to 0.006 in)
High range gear to high/low range hub clearance 0.05 to 0.15 mm (0.002 to 0.006 in)
Mainshaft input gear bearing pre-load 0.05 mm (0.002 in)
Intermediate gear bearing pre-load Torque intermediate shaft nut to 88 Nm (65 lbf.ft)
Type ZF4HP22, electro-hydraulic shift control with fluid torque
converter
Gears 4 forward, 1 reverse
Gear ratios:

First 2.480:1

Second 1.480:1

Third 1.000:1

Fourth 0.728:1

Reverse 2.086:1
Torque converter lock-up Engaged in third and fourth gears above 72 km/h (45 mph)
Input shaft axial end-float 0.2 to 0.4 mm (0.008 to 0.016 in)
Type Solid axle casing incorporating a spiral bevel differential and drive
shafts
Reduction ratio 3.538:1
Type Solid axle casing incorporating spiral bevel differential and drive
shafts with constant velocity joints.
Reduction ratio 3.538:1

TORQUE WRENCH SETTINGS
06-1
TORQUE WRE NCH SETTINGS
Maintenance
TORQUE DESCRIPTION METRIC IMPERIAL
Wheel nuts140 Nm (103 lbf.ft)
V8 oil drain plug33 Nm (24 lbf.ft)
Td5 oil drain plug23 Nm (17 lbf.ft)
Oil filter element, tighten two thirds of a turn by hand or to - 17 Nm (13 lbf.ft)
Manual gearbox oil drain plug 50 Nm (37 lbf.ft)
Manual gearbox oil filler/level plug 30 Nm (22 lbf.ft)
Automatic gearbox oil drain plug 15 Nm (11 lbf.ft)
Automatic gearbox oil drain plug 30 Nm (22 lbf.ft)
Transfer gearbox oil drain plug 30 Nm (22 lbf.ft)
Transfer gearbox oil filler/level plug 25 Nm (18 lbf.ft)
Axle oil drain plug 64 Nm (47 lbf.ft)
Axle oil filler/level plug 10 Nm (7 lbf.ft)

TORQUE WRENCH SETTINGS
06-2
Engine Td5
TORQUE DESCRIPTION METRIC IMPERIAL
ACE pump bolts25 Nm (18 lbf.ft)
A/C compressor bolts 25 Nm (18 lbf.ft)
Alternator support bracket to cylinder head bolts 25 Nm (18 lbf.ft)
Alternator/vacuum pump oil feed pipe union 10 Nm (7 lbf.ft)
Camshaft cover to camshaft carrier bolts 10 Nm (7 lbf.ft)
Camshaft sprocket to camshaft bolts 37 Nm (27 lbf.ft)
Centrifuge cover bolts 10 Nm (7 lbf.ft)
Centrifuge oil drain pipe to sump bolts (or nuts) 10 Nm (7 lbf.ft)
Centrifuge to oil drain pipe bolts 10 Nm (7 lbf.ft)
Centrifuge to oil cooler housing bolts 25 Nm (18 lbf.ft)
CKP sensor bolt10 Nm (7 lbf.ft)
Coolant pipe bolt50 Nm (37 lbf.ft)
Connecting rod bolts, then a further 80°20 Nm (15 lbf.ft)
Crankshaft pulley bolt 460 Nm (340 lbf.ft)
Crankshaft pulley TV damper bolts 80 Nm (59 lbf.ft)
Crankshaft rear oil seal housing bolts 10 Nm (7 lbf.ft)
Cylinder head bolts initial tighten 30 Nm (22 lbf.ft)
Cylinder head bolts final tighten, then a further 90°, then a further 180° and finally a
further 45°65 Nm (48 lbf.ft)
Dipstick tube to camshaft carrier bolt 10 Nm (7 lbf.ft)
Drive plate (automatic transmission) to crankshaft bolts 115 Nm (85 lbf.ft)
EGR pipe clamp to cylinder head bolt - if fitted 25 Nm (18 lbf.ft)
EGR pipe Allen screws 10 Nm (7 lbf.ft)
Engine mounting (front) to cylinder block bolts 48 Nm (35 lbf.ft)
Engine mounting (front) to chassis nuts 85 Nm (63 lbf.ft)
Engine mounting bracket (rear, LH & RH) to gearbox bolts 85 Nm (63 lbf.ft)
Engine mounting bracket (rear, LH & RH) nuts 45 Nm (33 lbf.ft)
Flywheel to crankshaft (manual transmission) bolts, then a further 90°40 Nm (30 lbf.ft)
Front crossmember bolts 26 Nm (20 lbf.ft)
Fuel connector block bolts 25 Nm (18 lbf.ft)
Fuel cooler to inlet manifold bolts 25 Nm (18 lbf.ft)
Gearbox housing to engine bolts 50 Nm (37 lbf.ft)
Heater pipe to cylinder head bolts 25 Nm (18 lbf.ft)
Main bearing cap bolts then a further 90°33 Nm (24 lbf.ft)
Oil cooler housing to cylinder block bolts 25 Nm (18 lbf.ft)
Oil cooler pipe clip bolts 10 Nm (7 lbf.ft)
Oil filter adaptor housing to oil cooler housing bolts 25 Nm (18 lbf.ft)
Oil pick-up strainer screws 10 Nm (7 lbf.ft)
Oil pressure switch 15 Nm (11 lbf.ft)
Oil pump drive sprocket bolt 25 Nm (18 lbf.ft)
Oil pump pressure relief valve plug 25 Nm (18 lbf.ft)
Oil pump and stiffener assembly to cylinder block bolts 13 Nm (10 lbf.ft)
Oil sump to cylinder block bolts 25 Nm (18 lbf.ft)
Oil sump to gearbox bell housing bolts 13 Nm (10 lbf.ft)
PAS pump bracket bolts 27 Nm (20 lbf.ft)
PAS pump pulley bolts 27 Nm (20 lbf.ft)
Rocker arm adjusting screw locknuts 16 Nm (12 lbf.ft)

TORQUE WRENCH SETTINGS
06-3
Rocker shaft bolts 32 Nm (24 lbf. ft)
Timing chain adjustable guide bolt 25 Nm (18 lbf.ft)
Timing chain cover bolts 27 Nm (20 lbf.ft)
Timing chain cover to cylinder block stud 7 Nm (5.2 lbf.ft)
Timing chain fixed guide retaining pin 25 Nm (18 lbf.ft)
Timing chain cover to cylinder head nut and bolt 25 Nm (18 lbf.ft)
Timing chain fixed guide (M6) bolt 10 Nm (7 lbf.ft)
Timing chain fixed guide (M10) bolt 45 Nm (33 lbf.ft)
Timing chain lubrication jet bolt 10 Nm (7 lbf.ft)
Timing chain tensioner 45 Nm (33 lbf.ft)
Torque converter to drive plate (automatic transmission) bolts 50 Nm (37 lbf.ft)
Turbocharger heatshield bolts 10 Nm (7 lbf.ft)
Turbocharger oil feed pipe banjo bolt 25 Nm (18 lbf.ft)
Turbocharger to exhaust manifold nuts 30 Nm (22 lbf.ft)
Vacuum pump oil feed pipe to cylinder head union 10 Nm (7 lbf.ft)
Viscous fan nut45 Nm (33 lbf.ft)
Fuel spill return pipe unions - if fitted 20 Nm (15 lbf.ft)TORQUE DESCRIPTION METRIC IMPERIAL