1999 LAND ROVER DISCOVERY ECU

FRONT SUSPENSION
REPAIRS 60-29
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.
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.

FRONT SUSPENSION
60-30 REPAIRS
Refit
1.Clean lower 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 lower ball joint
location.
3.Fit tool LRT-54-022 to tool LRT-54-008 and
secure with screw.
4.Fit tool LRT-54-022 and tool LRT-54-008 to
lower ball joint location on axle yoke.
5.Fit new lower ball joint to tool LRT-54-008/14.
6.Fit LRT-54-008/14 and lower ball joint to LRT-
54-008, with lower ball joint positioned on axle
yoke.
7.Align tool assembly and press lower ball joint
into axle yoke.
CAUTION: Damage to the joint boot will
result if the tool is not correctly aligned
during the fitting procedure.
8.Remove tools from axle yoke
9.Fit steering knuckle.

+ FRONT SUSPENSION, REPAIRS,
Steering knuckle.
Steering knuckle
$% 60.15.19
Remove
1.Remove wheel hub.

+ FRONT SUSPENSION, REPAIRS,
Wheel hub.
2.Remove 3 bolts securing mudshield and
remove mudshield.
3.Remove 2 nuts securing track rod and (if
applicable) drag link to steering knuckle.
4.Break taper joints using LRT-57-036, then
position track rod and drag link aside.

FRONT SUSPENSION
REPAIRS 60-31
5.Remove 2 nuts securing ball joints to steering
knuckle.
6.Break taper joints using LRT-54-027 and
remove steering knuckle.
7.Remove tension collet from steering knuckle.
8.Remove drive shaft oil seal from axle casing.Refit
1.Clean taper bores in steering knuckle and
tension collet.
2.Fit tension collet into steering knuckle and
tighten to 5 Nm (3.7 lbf.ft).
3.Clean ball joint tapers and taper seats.
4.Position steering knuckle to axle yoke. Fit
upper ball joint nut and tighten to 110 Nm (81
lbf.ft). Fit lower ball joint nut and tighten to 135
Nm (100 lbf.ft).
5.Clean track rod and (if applicable) drag link
tapers and taper seats.
6.Connect track rod and drag link to steering
knuckle. Fit track rod and drag link nuts and
tighten to 80 Nm (59 lbf.ft).
7.Clean mudshield and steering knuckle mating
faces. Position mudshield, fit bolts and tighten
to 10 Nm (7 lbf.ft).
8.Fit wheel hub.
+ FRONT SUSPENSION, REPAIRS,
Wheel hub.

FRONT SUSPENSION
60-32 REPAIRS
Road spring - front
$% 60.20.11
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.Support vehicle under chassis.
3.Remove front road wheels.
4.Support weight of front axle.
5.Remove 2 nuts securing anti-roll bar links to
front axle and disconnect links from axle.
6.Remove 2 bolts securing each damper to front
axle.
WARNING: Make sure the axle cannot move
when the damper is disconnected. The
damper limits the downward movement of
the axle. If the axle is not restrained,
disconnecting the damper will allow
unrestricted movement which may cause
personal injury or damage to equipment.
7.Lower front axle.
CAUTION: Ensure brake hoses and ABS
sensor harnesses are not damaged when
lowering front axle.
8.Release and remove front spring from damper.Refit
1.Clean front spring seats.
2.Position front spring, with close coil uppermost,
over damper and locate in cut out in lower
spring seat.
3.Ensure both front springs are correctly located
in spring seats and raise front axle. Fit bolts
securing both dampers to front axle and tighten
to 45 Nm (33 lbf.ft).
4.Ensure washer is in place on lower ball joint of
each anti-roll bar link, then connect lower ball
joints to axle. Tighten nuts to 100 Nm (74 lbf.ft).
5.Fit front road wheels and tighten nuts to 140
Nm (103 lbf.ft).
6.Remove stands and lower vehicle.

FRONT SUSPENSION
REPAIRS 60-33
Wheel hub
$% 60.25.01
Remove
1.Release ABS sensor harness grommet from
inner wing valance and disconnect multiplug.
2.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.
3.Remove road wheel.
4.Pull ABS sensor harness through aperture into
wheel arch.5.Release harness from brackets on inner wing
valance, suspension turret and front hub.
6.Release stake from drive shaft nut.
7.With assistance, remove drive shaft nut.
Discard the nut.
8.Remove front brake disc.

+ BRAKES, REPAIRS, Brake disc -
front.
9.Remove 4 bolts securing wheel hub to steering
knuckle.
10.Release wheel hub from steering knuckle, then
remove wheel hub and drive shaft assembly
from axle.
CAUTION: Do NOT remove the ABS sensor
from the hub. The hub and the sensor are
supplied as an assembly.

FRONT SUSPENSION
REPAIRS 60-35
6.Apply a 3 mm (0.125 in) wide bead of sealant,
Part No. STC 50554 around drive shaft
circumference, as illustrated.
7.Ensure ABS harness is located in cut out in
steering knuckle.
8.Fit wheel hub to drive shaft and align steering
knuckle. The sealant will smear along the
length of the splines as the wheel hub is fitted
to the drive shaft.
9.Fit wheel hub bolts and tighten to 100 Nm (74
lbf.ft).
10.Fit new drive shaft nut and lightly tighten.
11.Fit front brake disc.

+ BRAKES, REPAIRS, Brake disc -
front.
12.With assistance, final tighten drive shaft nut to
490 Nm (360 lbf.ft). Stake drive shaft nut. The
drive shaft nut must be tightened before
sealant has cured.
13.Secure ABS sensor harness to brackets and
secure grommet to inner wing.
14.Fit road wheel and tighten nuts to 140 Nm (103
lbf.ft).
15.Remove stand(s) and lower vehicle.
16.Connect ABS sensor multiplug.
Damper - front
$% 60.30.02
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 road wheel.
3. RH damper: Release coolant reservoir and
position aside.
4.Loosen through bolt securing damper to turret.
WARNING: Make sure the axle cannot move
when the damper is disconnected. The
damper limits the downward movement of
the axle. If the axle is not restrained,
disconnecting the damper will allow
unrestricted movement which may cause
personal injury or damage to equipment.
M51 0058

FRONT SUSPENSION
60-36 REPAIRS
5.Remove 4 nuts securing turret base to chassis.
6.Remove 2 bolts securing damper to axle.
7. ACE models: Remove bolt securing ACE pipe
clamp to chassis.
8. ACE models: Remove bolt securing ACE pipe
clamp to turret.
9.Release harness clip from turret.
10.Raise turret and remove through bolt.
11.Compress damper and manoeuvre turret from
engine bay.
12.Remove damper. Refit
1.Position damper and manoeuvre turret into
position. Raise damper and align to turret. Fit
through bolt but do not tighten at this stage.
2.Align damper assembly to spring seat.
3.Fit bolts securing damper to axle and tighten to
45 Nm (33 lbf.ft).
4.Fit nuts securing turret to chassis and tighten
to 23 Nm (17 lbf.ft).
5.Tighten through bolt to 125 Nm (92 lbf.ft).
6. ACE models: Position ACE pipe clamp to
chassis and secure with bolt.
7. ACE models: Position ACE pipe clamp to
turret and secure with bolt.
8.Secure harness to turret.
9. RH damper: Reposition coolant reservoir.
10.Fit road wheel and tighten nuts to 140 Nm (103
lbf.ft).
11.Remove stand(s) and lower vehicle.

FRONT SUSPENSION
REPAIRS 60-37
Bushes - radius arm
$% 60.35.18
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 road wheel.
3.Remove and discard nut securing track rod to
steering knuckle.
4.Using LRT-57-036 break taper, release track
rod and position aside5.Remove and discard cable tie securing front
axle breather
6.Remove nut and bolt securing radius arm to
chassis.
7.Remove 2 nuts securing radius arm to axle.
8.Remove rear bolt from radius arm.
9.Remove front bolt from radius arm and remove
radius arm from axle.