2002 LAND ROVER DISCOVERY clutch

CONTENTS
CONTENTS 1
INTRODUCTION ...................................................................................... 01-1
How To Use This Manual................................................................................................................ 01-1
Repairs and Replacements ............................................................................................................. 01-1
Specifications .................................................................................................................................. 01-2
Abbreviations and Symbols ............................................................................................................ 01-3
GENERAL INFORMATION ...................................................................... 03-1
General Precautions ....................................................................................................................... 03-1
Safety Instructions .......................................................................................................................... 03-2
Environmental Precautions ............................................................................................................. 03-3
General Fitting Instructions ............................................................................................................. 03-6
Ball and Roller Bearings ................................................................................................................. 03-7
Oil Seals.......................................................................................................................................... 03-8
Joints and Joint Faces .................................................................................................................... 03-9
Locking Devices .............................................................................................................................. 03-9
Screw Threads ................................................................................................................................ 03-10
Bolt and Nut Identification ............................................................................................................... 03-11
Flexible Pipes and Hoses ............................................................................................................... 03-13
Rolling Road Testing....................................................................................................................... 03-15
Fuel Handling Precautions .............................................................................................................. 03-16
Electrical Precautions ..................................................................................................................... 03-17
Supplementary Restraint System Precautions ............................................................................... 03-18
SRS Component Replacement Policy ............................................................................................ 03-23
Air Conditioning System Precautions .............................................................................................. 03-24
Air Conditioning Compressor Replacement .................................................................................... 03-26
Body Repairs .................................................................................................................................. 03-26
GENERAL DATA ..................................................................................... 04-1
Engine - Td5 ................................................................................................................................... 04-1
Engine - V8 ..................................................................................................................................... 04-4
Fuel system - Td5 ........................................................................................................................... 04-8
Fuel system - V8 ............................................................................................................................. 04-9
Cooling system - Td5 ...................................................................................................................... 04-9
Cooling system - V8 ........................................................................................................................ 04-10
Clutch - Td5 .................................................................................................................................... 04-10
Clutch - V8 ...................................................................................................................................... 04-11
Manual gearbox - R380 .................................................................................................................. 04-12
Transfer box - LT230SE .................................................................................................................. 04-13
Automatic gearbox - ZF4HP22/24 .................................................................................................. 04-13
Rear axle......................................................................................................................................... 04-13
Front axle ........................................................................................................................................ 04-13
Steering........................................................................................................................................... 04-14
Suspension ..................................................................................................................................... 04-15
Brakes ............................................................................................................................................. 04-16
Wheels and tyres ............................................................................................................................ 04-16
Air conditioning ............................................................................................................................... 04-17
Electrical - Td5 ................................................................................................................................ 04-17
Electrical - V8 .................................................................................................................................. 04-17
Dimensions ..................................................................................................................................... 04-18
Weights ........................................................................................................................................... 04-18

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
CONTENTS 3
Alarm handset battery ..................................................................................................................... 10-6
Road wheels ................................................................................................................................... 10-7
Tyres .............................................................................................................................................. 10-7
Brake pads, discs and calipers ....................................................................................................... 10-7
Road wheel speed sensors ............................................................................................................. 10-7
Brake fluid ....................................................................................................................................... 10-8
Fuel filter - diesel engine ................................................................................................................. 10-8
Fuel filter sedimenter ...................................................................................................................... 10-8
Road wheels ................................................................................................................................... 10-8
Radiator/Intercooler ........................................................................................................................ 10-8
Ambient air Temperature and pressure sensor .............................................................................. 10-8
Doors, bonnet and fuel filler flap ..................................................................................................... 10-9
Air suspension intake filter .............................................................................................................. 10-9
Anti-freeze....................................................................................................................................... 10-9
Cooling system ............................................................................................................................... 10-9
Spark plugs - V8 engine.................................................................................................................. 10-10
Air cleaner - V8 engine ................................................................................................................... 10-11
Air cleaner and dump valve - diesel engine .................................................................................... 10-11
Auxiliary drive belt ........................................................................................................................... 10-11
Auxiliary drive belt - V8 engine ....................................................................................................... 10-12
Auxiliary drive belt - diesel engine .................................................................................................. 10-12
Fluid reservoirs ............................................................................................................................... 10-12
Steering box .................................................................................................................................... 10-13
Battery ............................................................................................................................................. 10-13
Intercooler - diesel engine............................................................................................................... 10-14
Engine oil - V8 engine ..................................................................................................................... 10-14
Engine oil - diesel engine ................................................................................................................ 10-14
Centrifuge rotor – diesel engine ...................................................................................................... 10-15
Engine oil filter - diesel engine ........................................................................................................ 10-15
Engine oil filter – V8 engine ............................................................................................................ 10-15
Manual gearbox .............................................................................................................................. 10-16
Automatic gearbox ......................................................................................................................... 10-17
Transfer box .................................................................................................................................... 10-18
Front and rear axle .......................................................................................................................... 10-19
Propeller shafts ............................................................................................................................... 10-19
Anti-roll bar links ............................................................................................................................. 10-20
ACE actuators ................................................................................................................................. 10-21
ACE filter ......................................................................................................................................... 10-21
Brake hose, brake, fuel, ACE, clutch pipes and unions/electrical harnesses ................................ 10-22
Engine, gearbox, transfer box and axles ........................................................................................ 10-23
Exhaust system............................................................................................................................... 10-23
Steering box and front suspension ................................................................................................. 10-23
Steering rod ball joints ................................................................................................................... 10-25
Dampers and SLS height sensors .................................................................................................. 10-25
Front and rear axle suspension links .............................................................................................. 10-26
Towing bracket................................................................................................................................ 10-27
Engine mountings - V8 engine ........................................................................................................ 10-27
Road/roller test................................................................................................................................ 10-28
ENGINE - Td5 ........................................................................................... 12-1-1
DESCRIPTION AND OPERATION
Td5 Engine...................................................................................................................................... 12-1-1
Cylinder block components ............................................................................................................. 12-1-2

CONTENTS
CONTENTS 7
Operation ........................................................................................................................................ 18-1-38
ADJUSTMENTS
Glow plug ....................................................................................................................................... 18-1-45
REPAIRS
Engine control module (ECM) ........................................................................................................ 18-1-47
Sensor - engine coolant temperature (ECT) ................................................................................. 18-1-47
Sensor - crankshaft (CKP) .............................................................................................................. 18-1-48
Air filter assembly ........................................................................................................................... 18-1-48
Element - air filter ............................................................................................................................ 18-1-49
Sensor - fuel temperature .............................................................................................................. 18-1-50
Sensor - mass air flow (MAF) ....................................................................................................... 18-1-51
Sensor - combined MAP and IAT ................................................................................................. 18-1-51
Sensor - ambient air pressure (AAP) ............................................................................................ 18-1-52
Element - fuel filter ........................................................................................................................ 18-1-53
Cooler - fuel .................................................................................................................................. 18-1-53
Sensor - Throttle position (TP) ........................................................................................................ 18-1-54
Turbocharger ................................................................................................................................ 18-1-55
Intercooler ..................................................................................................................................... 18-1-56
Valve - solenoid boost control ........................................................................................................ 18-1-58
Regulator - fuel pressure .............................................................................................................. 18-1-59
Glow plugs ...................................................................................................................................... 18-1-60
Injectors .......................................................................................................................................... 18-1-61
Switch - cruise control (on/off) ........................................................................................................ 18-1-62
Switch - cruise control (set/resume) ................................................................................................ 18-1-63
Switch - clutch ................................................................................................................................. 18-1-63
ENGINE MANAGEMENT SYSTEM - V8 .................................................. 18-2-1
DESCRIPTION AND OPERATION
Engine management component location - Passenger compartment ............................................ 18-2-2
Engine management component location - Engine compartment .................................................. 18-2-3
Engine management block diagram ............................................................................................... 18-2-4
Description - engine management .................................................................................................. 18-2-6
Operation - engine management .................................................................................................... 18-2-43
DESCRIPTION AND OPERATION
Cruise control component layout .................................................................................................... 18-2-55
Cruise control block diagram .......................................................................................................... 18-2-56
Description - cruise control ............................................................................................................. 18-2-57
Operation - cruise control................................................................................................................ 18-2-66
ADJUSTMENTS
Cable - throttle ............................................................................................................................. 18-2-69
Cable - cruise control .................................................................................................................... 18-2-69
REPAIRS
Spark plugs .................................................................................................................................. 18-2-71
Coil - ignition ................................................................................................................................. 18-2-71
Engine control module (ECM) ......................................................................................................... 18-2-72
Sensor - engine coolant temperature (ECT) ................................................................................ 18-2-73
Sensor - crankshaft position (CKP) ............................................................................................... 18-2-74
Sensor - radiator temperature ....................................................................................................... 18-2-75
Sensor - camshaft position (CMP) ................................................................................................. 18-2-76

CONTENTS
8CONTENTS
Knock sensor (KS) .......................................................................................................................... 18-2-76
Air cleaner assembly .................................................................................................................... 18-2-77
Element - air filter .......................................................................................................................... 18-2-78
Cable - throttle ................................................................................................................................ 18-2-78
Sensor - Mass Air Flow (MAF) ...................................................................................................... 18-2-79
Throttle Body .................................................................................................................................. 18-2-80
Plenum chamber............................................................................................................................. 18-2-81
Sensor - throttle position (TP) ....................................................................................................... 18-2-82
Valve - idle air control (IACV) ....................................................................................................... 18-2-82
Injectors ......................................................................................................................................... 18-2-83
Actuator - cruise control ................................................................................................................ 18-2-84
Vacuum control unit - up to 03MY .................................................................................................. 18-2-85
Vacuum control unit - from 03MY ................................................................................................... 18-2-85
Cable - cruise control ..................................................................................................................... 18-2-86
Switch - cruise control (on/off) ........................................................................................................ 18-2-87
Switch - cruise control (set/resume) .............................................................................................. 18-2-87
Switch - clutch pedal - cruise control ............................................................................................ 18-2-88
ECU - Cruise control ..................................................................................................................... 18-2-88
FUEL DELIVERY SYSTEM - Td5 ............................................................. 19-1-1
DESCRIPTION AND OPERATION
Fuel delivery system component location ....................................................................................... 19-1-1
Fuel tank and breather components ............................................................................................... 19-1-2
Description ...................................................................................................................................... 19-1-3
Operation ........................................................................................................................................ 19-1-11
ADJUSTMENTS
Fuel system purging ....................................................................................................................... 19-1-13
Fuel tank - drain .............................................................................................................................. 19-1-13
REPAIRS
Switch - inertia - fuel cut-off ............................................................................................................ 19-1-15
Pump - fuel .................................................................................................................................... 19-1-15
Tank - fuel ..................................................................................................................................... 19-1-17
Solenoid - fuel filler flap release .................................................................................................... 19-1-18
Switch - fuel filler flap release - up to 03MY ................................................................................... 19-1-18
Switch - fuel filler flap release - from 03MY .................................................................................... 19-1-19
FUEL DELIVERY SYSTEM - V8 ............................................................... 19-2-1
DESCRIPTION AND OPERATION
Fuel delivery system ....................................................................................................................... 19-2-1
Fuel tank and breather components (all except NAS) .................................................................... 19-2-2
Fuel tank and breather components (NAS) .................................................................................... 19-2-3
Description ...................................................................................................................................... 19-2-4
Operation ........................................................................................................................................ 19-2-10
ADJUSTMENTS
Fuel tank - drain .............................................................................................................................. 19-2-11
REPAIRS
Switch - inertia - fuel cut-off ............................................................................................................ 19-2-13
Pump - fuel .................................................................................................................................... 19-2-13
Tank - fuel ...................................................................................................................................... 19-2-15
Filler tube - fuel ............................................................................................................................. 19-2-16

CONTENTS
10 CONTENTS
MANIFOLDS AND EXHAUST SYSTEMS - V8......................................... 30-2-1
DESCRIPTION AND OPERATION
Exhaust manifold component layout ............................................................................................... 30-2-1
Inlet manifold component layout ..................................................................................................... 30-2-2
Exhaust system component layout ................................................................................................. 30-2-4
Description ...................................................................................................................................... 30-2-5
REPAIRS
Front pipe........................................................................................................................................ 30-2-9
Intermediate pipe/silencer .............................................................................................................. 30-2-10
Tail pipe .......................................................................................................................................... 30-2-11
Heat shield - brake servo - Without Secondary Air Injection .......................................................... 30-2-11
Heat shield - brake servo - With Secondary Air Injection .............................................................. 30-2-12
Gasket - inlet manifold - lower ........................................................................................................ 30-2-12
Gasket - exhaust manifold ........................................................................................................... 30-2-16
Gasket - inlet manifold - upper - Without Secondary Air Injection .................................................. 30-2-17
Gasket - inlet manifold - upper - With Secondary Air Injection ..................................................... 30-2-19
CLUTCH - Td5 .......................................................................................... 33-1-1
DESCRIPTION AND OPERATION
Clutch components ......................................................................................................................... 33-1-2
Hydraulic operation ......................................................................................................................... 33-1-4
Description ...................................................................................................................................... 33-1-6
Operation ........................................................................................................................................ 33-1-10
ADJUSTMENTS
Clutch hydraulic system - bleed ...................................................................................................... 33-1-11
REPAIRS
Clutch assembly ........................................................................................................................... 33-1-13
Master cylinder .............................................................................................................................. 33-1-14
Bearing and lever - clutch release ................................................................................................ 33-1-15
Slave cylinder ................................................................................................................................. 33-1-15
CLUTCH - V8 ............................................................................................ 33-2-1
DESCRIPTION AND OPERATION
Clutch components ......................................................................................................................... 33-2-2
Hydraulic operation ......................................................................................................................... 33-2-4
Description ...................................................................................................................................... 33-2-6
Operation ........................................................................................................................................ 33-2-10
ADJUSTMENTS
Clutch hydraulic system - bleed ...................................................................................................... 33-2-11
REPAIRS
Clutch assembly ............................................................................................................................ 33-2-13
Master cylinder ............................................................................................................................... 33-2-14
Bearing and lever - clutch release ................................................................................................ 33-2-15
Slave cylinder ................................................................................................................................. 33-2-15

CONTENTS
CONTENTS 11
MANUAL GEARBOX - R380 .................................................................... 37-1
DESCRIPTION AND OPERATION
R380 gearbox ................................................................................................................................. 37-1
Gearbox casings, gear change and oil pump ................................................................................ 37-2
Selector shaft and forks, synchromesh assemblies and gear train ................................................ 37-4
R380 gearbox cross section ........................................................................................................... 37-6
Description ...................................................................................................................................... 37-7
Operation ........................................................................................................................................ 37-8
ADJUSTMENTS
Spring - gear lever bias .................................................................................................................. 37-9
REPAIRS
Housing - gear selector .................................................................................................................. 37-11
Gearbox - V8................................................................................................................................... 37-12
Gearbox - Diesel ............................................................................................................................. 37-16
Seal - gearbox mainshaft ............................................................................................................... 37-20
Seal - input shaft ............................................................................................................................ 37-21
Cooler - oil - gearbox - Diesel ......................................................................................................... 37-22
Cooler - oil - gearbox - V8 ............................................................................................................... 37-23
Switch - Reverse light ................................................................................................................... 37-24
OVERHAUL
Shaft - output ................................................................................................................................. 37-25
Synchroniser - gearbox - set ......................................................................................................... 37-29
Fork - set - selector shaft .............................................................................................................. 37-31
Shaft - gearbox - input .................................................................................................................. 37-32
Extension - gearbox rear ................................................................................................................ 37-35
Pump - gearbox oil ......................................................................................................................... 37-37
Filter - gearbox oil ......................................................................................................................... 37-38
Gear - 5th gear set ........................................................................................................................ 37-38
Synchronizer assembly - 5th/reverse ............................................................................................ 37-39
5th gear - layshaft ......................................................................................................................... 37-40
Bearing - layshaft rear support ...................................................................................................... 37-42
Bearing - output shaft rear support ............................................................................................... 37-43
Shaft - reverse idler ....................................................................................................................... 37-44
Housing - gear selector mechanism ............................................................................................. 37-46
Lever - gear change ...................................................................................................................... 37-47
Housing - clutch ............................................................................................................................ 37-48
Cover - front ................................................................................................................................... 37-49
TRANSFER BOX - LT230SE .................................................................... 41-1
DESCRIPTION AND OPERATION
LT230SE transfer box ..................................................................................................................... 41-1
Transfer box cross section .............................................................................................................. 41-2
Main casing components – Vehicles up to 03 model year .............................................................. 41-4
Main casing components – Vehicles from 03 model year ............................................................... 41-5
Differential components – Vehicles up to 03 model year ................................................................ 41-6
Differential components – Vehicles from 03 model year ................................................................. 41-7
Front output housing components – Vehicles up to 03 model year ................................................ 41-8
Front output housing components – Vehicles from 03 model year ................................................. 41-10
Rear output housing components ................................................................................................... 41-12
Description ...................................................................................................................................... 41-13

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