2002 LAND ROVER DISCOVERY air suspension

GENERAL DATA
04-15
Suspension
* Measurement taken with vehicle at unladen weight.
Type - Front Beam axle with coil springs, longitudinal radius arms,
Panhard rod, twin tube dampers and either anti-roll
bar or active cornering enhancement (ACE)
Nominal height from hub centre to wheel arch (not liner)* 500 ± 15 mm (19.7 ± 0.6 in)
Front road spring colour codes:

V8 LHS Pink/orange

V8 RHS - LHD Pink/orange

V8 RHS - RHD White/purple

Td5 LHS White/purple

Td5 RHS - LHD White/purple

Td5 RHS - RHD White/purple
Rear road spring colour codes:
5 seat, LHS Purple
5 seat, RHS - LHD Purple
5 seat, RHS - RHD Purple/purple
7 seat, LHS - LHD Grey/blue
7 seat, LHS - RHD Grey/green
7 seat, RHS - LHD Grey/blue
7 seat, RHS - RHD Grey/white
Bump stop height (top of bump stop to axle bracket) 44.5 mm (1.75 in)
Anti-roll bar diameter - front

With ACE fitted 35 mm (1.38 in)

Without ACE 30 mm (1.18 in)
Type - Rear Beam axle with coil or air springs, longitudinal radius
arms, Watts linkage, twin tube dampers and either
anti-roll bar or active cornering enhancement (ACE)
Nominal height from hub centre to wheel arch (not liner):*

Coil spring 483 ± 15 mm (19.0 ± 0.6 in)

Air spring 473 ± 15 mm (18.6 ± 0.6 in)
Road spring colour code Purple (all models)
Bump stop height (top of bump stop to axle bracket):

Coil spring 71.5 mm (2.8 in)

Air spring 61.5 mm (2.4 in)
Anti-roll bar diameter - rear

With ACE fitted 35 mm (1.38 in)

Without ACE - SLS fitted 29 mm (1.14 in)

Without ACE - SLS not fitted 5 seats = 19 mm (0.75 in)
7 seats = 16 mm (0.63 in)

MAINTENANCE
PROCEDURES 10-9
Doors, bonnet and fuel filler flap
Check
1.Check operation of each door, door lock,
bonnet catch and fuel filler flap. Ensure doors
close securely.
Lubricate
1.Lubricate door locks, hinges, check straps,
bonnet catch and fuel filler flap.

+ CAPACITIES, FLUIDS AND
LUBRICANTS, Lubrication.
Air suspension intake filter
Check
1.Check condition of filter and that filter is clean,
replace if necessary.

+ REAR SUSPENSION, REPAIRS,
Filter - intake - SLS.
Anti-freeze
Replace
1.Replace anti-freeze.

+ COOLING SYSTEM - Td5,
ADJUSTMENTS, Drain and refill.

+ COOLING SYSTEM - V8,
ADJUSTMENTS, Drain and refill.
Cooling system
Check
1.Check cooling, intercooler and heating systems
for leaks; hoses and oil pipes for security and
condition.
2.Check accessible hose clips for tightness.
3.Check coolant level, top-up if necessary.
Top-up
1.With engine cold, remove expansion tank filler
cap.
2.Top-up with recommended mixture of coolant
until level reaches mark on expansion tank.

+ CAPACITIES, FLUIDS AND
LUBRICANTS, Anti-Freeze Concentration.
3.Fit expansion tank filler cap.

MAINTENANCE
PROCEDURES 10-21
ACE actuators
Check
Actuator boots
1.Check ACE actuator gaiters for splits, damage
and clips for security.
ACE filter
Replace
1.Replace ACE filter.

+ FRONT SUSPENSION, REPAIRS,
Filter - high pressure - ACE.

FRONT AXLE
REPAIRS 54-11
Constant velocity joint - drive shaft
$% 54.20.21
Remove
1.Remove wheel hub.

+ FRONT SUSPENSION, REPAIRS,
Wheel hub.
2.Place drive shaft in vice.
3.Release both securing bands from gaiter and
discard.
4.Compress gaiter to gain access to joint.
5.Using a suitable drift against the inner part of
the joint, remove joint from shaft.
6.Remove circlip from shaft and discard.
7.Remove spacer from shaft.
8.Remove gaiter from shaft and inspect for
damage. Renew if necessary. Refit
1.Clean drive shaft and gaiter.
2.Clean spacer.
3.Fit new inner securing band to gaiter.
4.Fit gaiter to shaft.
5.Fit spacer to shaft.
6.Fit new circlip to shaft.
7.Position joint to shaft. Use a screwdriver to
press circlip into its groove and push joint fully
onto shaft.
8.Apply grease from the sachet to the joint.
9.Position gaiter to joint and fit new outer
securing band.
10.Use a Band-it thriftool to secure inner and outer
securing bands.
11.Fit wheel hub.

+ FRONT SUSPENSION, REPAIRS,
Wheel hub.

FRONT SUSPENSION
DESCRIPTION AND OPERATION 60-13
Lateral acceleration of the body is sensed by two accelerometers and signals are transmitted to the ECU. The engine
driven hydraulic pump supplies a constant hydraulic flow to the valve block. Two directional control valves are
solenoid operated by the ECU and these supply fluid to the applicable side of each actuator to apply an equal and
opposite force to the torsion bar. In operation the ACE system maintains the attitude of the vehicle body when
cornering.
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.
lACE components are thoroughly cleaned externally before work commences;
lall opened pipe and module ports are capped immediately;
lall 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).

FRONT SUSPENSION
REPAIRS 60-29
REPAIRS
Bushes - Panhard rod
$% 60.10.07
Remove
1.Raise front of vehicle.
WARNING: Do not work on or under a
vehicle supported only by a jack. Always
support the vehicle on safety stands.
2.Remove 2 nuts and bolts securing Panhard rod
to axle and chassis.
3.Remove Panhard rod from vehicle.
4.Use tool LRT-60-013 fitted with LRT-60-013/1
and LRT-60-013/3 to press out bushes from
Panhard rod. Refit
1.Clean bush locations in Panhard rod.
2.Use tool LRT-60-013 fitted with LRT-60-013/1
and LRT-60–013/2 to press new bushes into
Panhard rod. Ensure pressure is applied to
the outer edge of the bush, not the rubber
inner.
3.Position Panhard rod to axle and chassis.
4.Fit bolts securing Panhard rod but do not
tighten at this stage.
5.Remove stand(s) and lower vehicle.
6.Tighten bolts securing Panhard rod to 230 Nm
(170 lbf.ft).
CAUTION: Nuts and bolts must be tightened
with weight of vehicle on suspension.

FRONT SUSPENSION
60-30 REPAIRS
Ball joint - upper - steering knuckle
$% 60.15.02
CAUTION: Each ball joint can be replaced up to
three times before the axle yoke bore becomes
oversize. Before commencing work, thoroughly
clean surface of joint and check for yellow paint
marks approx. 12 mm (0.5 in) wide. If 3 marks are
found, the axle case must be renewed.
Remove
1.Remove steering knuckle.

+ FRONT SUSPENSION, REPAIRS,
Steering knuckle.
2.Support the chassis on stands.
3.Support the front axle on stands.
4.Remove 2 nuts securing anti-roll bar lower links
to front axle, use a 16 mm spanner to prevent
link joint from turning.
5.Remove 2 bolts securing each front damper to
axle.
6.Remove 8 bolts securing chassis crossmember
and remove crossmember.
7.Remove bolt securing brake hose and ABS
sensor harness bracket to axle.
8.Lower the front axle, release front spring from
damper and remove front spring.9.Fit tool LRT-54-008/22 to tool LRT-54-008.
10.Fit tool LRT-54-008/4 to tool LRT-54-008, and
secure with screw.
11.Fit tool LRT-54-008 with all attachments to
upper ball joint..
12.Fit tool LRT-54-008/5 to the top of the ball
joint.
13.Press upper ball joint from axle. When ram lead
screw reaches the end of its stroke, retract the
lead screw and screw the ram further into the
tool. Repeat the operation until the ball joint is
released from the axle.
14.Dismantle the tools.
Refit
1.Clean upper ball joint location and surrounding
area of axle yoke.
2.Apply a 12 mm (0.5 in) wide yellow paint stripe
on axle yoke, adjacent to upper ball joint
location.

FRONT SUSPENSION
REPAIRS 60-31
3.Fit tool LRT-54-021 to tool LRT-54-008, and
secure with the screw.
4.Fit tool LRT-54-008/7 to tool LRT-54-008 and
position tool assembly over ball joint and axle.
5.Align tool assembly and press upper ball joint
into axle yoke.
CAUTION: Damage to the joint boot will
result if the tool is not correctly aligned
during the fitting procedure.
6.Remove tools from axle yoke.
7.Clean the spring seats.
8.Position spring over damper and locate in cut-
out in spring seat.
9.Raise the front axle, fit bolts securing dampers
to front axle and tighten to 45 Nm (33 lbf.ft).
10.Fit chassis crossmember, fit bolts and tighten to
25 Nm (18 lbf.ft).
11.Locate brake hose bracket and tighten bolt to
20 Nm (15 lbf.ft).
12.Position anti-roll bar links to the axle, fit the nuts
and tighten to 100 Nm (74 lbf.ft).
13.Fit steering knuckle.

+ FRONT SUSPENSION, REPAIRS,
Steering knuckle.
Ball joint - lower - steering knuckle
$% 60.15.03
CAUTION: Each ball joint can be replaced up to
three times before the axle yoke bore becomes
oversize. Before commencing work, thoroughly
clean surface of joint and check for yellow paint
marks approx. 12 mm (0.5 in) wide. If 3 marks are
found, the axle case must be renewed.
Remove
1.Remove steering knuckle.

+ FRONT SUSPENSION, REPAIRS,
Steering knuckle.
2.Fit tool LRT-54-008/22 to tool LRT-54-008.
3.Fit tool LRT-54-008/24 to tool LRT-54-008 and
secure with screw.
4.Fit tool LRT-54-008/23 to underside of lower
ball joint.
5.With assistance, fit tool LRT-54-008 assembly
to lower ball joint.
6.Press ball joint from axle. When ram lead
screw reaches the end of its stroke, retract the
lead screw and screw the ram further into the
tool. Repeat the operation until the ball joint is
released from the axle.
7.Remove tools and the lower ball joint from axle
yoke.