Workshop Manuals Factory service & repair Land Rover
01 Discovery Series II - Workshop Manual - 1999MY ON - 6th Edition - NAS02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 INTRODUCTION32 33 GENERAL INFORMATION34 35 GENERAL DATA36 IDENTIFICATION NUMBERS37 38 TORQUE WRENCH SETTINGS39 40 LIFTING AND TOWING41 CAPACITIES, FLUIDS, LUBRICANTS AND SEALANTS42 43 44 MAINTENANCE45 46 ENGINE - V847 48 EMISSION CONTROL - V849 50 ENGINE MANAGEMENT SYSTEM - V851 FUEL DELIVERY SYSTEM - V852 53 COOLING SYSTEM - V854 55 MANIFOLDS AND EXHAUST SYSTEMS - V856 57 58 59 CLUTCH - V860 61 MANUAL GEARBOX - R38062 63 TRANSFER BOX - LT230SE64 65 66 AUTOMATIC GEARBOX - ZF4HP22 - 2467 PROPELLER SHAFTS68 69 REAR AXLE70 71 72 73 74 75 FRONT AXLE76 77 78 79 STEERING80 FRONT SUSPENSION81 82 83 REAR SUSPENSION84 85 86 87 BRAKES88 RESTRAINT SYSTEMS89 90 DOORS91 EXTERIOR FITTINGS92 93 INTERIOR TRIM COMPONENTS94 SCREENS95 96 97 SEATS98 99 SUNROOF100 CHASSIS AND BODY DIMENSIONS101 102 103 104 PANEL REPAIRS105 106 107 108 BODY SEALING MATERIALS109 110 111 112 113 CORROSION PREVENTION AND SEALING114 PAINTING115 HEATING AND VENTILATION116 117 AIR CONDITIONING118 119 WIPERS AND WASHERS120 CHARGING AND STARTING121 122 LIGHTING123 BODY CONTROL UNIT124 125 126 ALARM SYSTEM AND HORN127 128 WINDOWS129 IN CAR ENTERTAINMENT130 HARNESSES131 DRIVING AIDS132 NAVIGATION SYSTEM133 INSTRUMENTS
Land Rover Discovery II80 · FRONT SUSPENSION
80 · Steering & suspension

Description - ACE (FRONT SUSPENSION) (page 3 of 13)

Make
Land Rover
Model
Discovery II
Section
DESCRIPTION AND OPERATION
FRONT SUSPENSIONDescription - ACE · page 3 of 13
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FRONT SUSPENSION

DESCRIPTION AND OPERATION

60-11

The ACE system uses a semi-synthetic hydraulic fluid which is the same as the fluid used for the PAS system. The 
total capacity of the ACE system is 1.62 litres (0.42 US Gallons).

CAUTION: The ACE hydraulic system is extremely sensitive to the ingress of dirt or debris. The smallest 
amount could render the system unserviceable. It is imperative that the following precautions are taken. 

l

ACE components are thoroughly cleaned externally before work commences;

l

all opened pipe and module ports are capped immediately;

l

all fluid is stored in and administered through clean containers.

In the event of an ECU or hydraulic failure the system will fail safe to a 'locked bars' condition. The 'locked bars' 
condition will allow the torsion bars to operate in a similar manner as conventional 'passive' anti-roll bars. Prolonged 
cornering forces will allow a progressive increase in roll angle due to hydraulic leakage through the actuators and 
valve block. Failures will be relayed to the driver by the illumination of the ACE warning lamp in the instrument pack. 
Faults are recorded by the ECU and can be retrieved using TestBook.

When the ignition switch is moved to position II, the warning lamp will illuminate for two seconds to check functionality. 
The warning lamp functionality can also be checked using TestBook. 

TestBook must also be used to perform a bleeding procedure after maintenance operations have been performed to 
ensure that complete system bleeding is performed. Trapped air in the system can seriously reduce the system 
performance.

Fluid reservoir
The moulded plastic fluid reservoir is mounted on the left hand side of the engine compartment on a bracket which is 
attached to the inner wing. The reservoir is dual purpose, being divided into two separate chambers; one for the ACE 
system and one for the PAS system. Each chamber has its own filler neck and cap and is identified by moulded 
lettering on the reservoir adjacent to each filler.

A non-serviceable filter assembly is fitted in the base of each chamber. The filter is made from fine stainless steel 
mesh which is moulded into the body of the reservoir. The filter removes particulate matter from the fluid before it is 
drawn into the hydraulic pump.

Upper and lower fluid level marks are moulded onto the reservoir body. The capacity of the ACE reservoir chamber 
to the upper level mark is 0.5 litre (0.13 US Gallon).

Parts & tools for this job For Land Rover Discovery

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