300Tdi Discovery
STEERING
11
FAULT DIAGNOSIS
STIFF STEERING CHECKLIST
NOTE: Having completed visual checks
and steering assessment and confirmed
that vehicle steering load is incorrect carry
out the following procedure in order shown.
Steering wheel ’torque to turn’ loads
1. Raise vehicle so both front wheels free.
2. With engine off, centralise steering wheel, and
remove air bag, if fitted or steering wheel pad.
Using torque wrench on column nut, check
torque required to turn the steering wheel one
turn in each direction.
3. Record readings obtained in each direction.
Compare figures obtained with the specified
figures:
Without ABS
4.40 Nm.
With ABS
4.65 Nm.
NOTE: If figures are in excess of those
specified carry out steering box tie bar
reset below. If figures are as specified.
See Visual Check and Basic Adjustments
Steering box tie bar reset
1. Loosen the three tie bar fixings one complete
turn.
2. Drive vehicle carefully a short distance (within
the dealership) applying full lock in both
directions in order to settle steering components.
Drive vehicle over speed bumps and include
harsh braking if possible.
WARNING: Do not drive on public
highway.
3. Near end of 2. ensure vehicle is driven in a
straight line on level ground and halted.
4. Tighten panhard rod mounting arm nut,
110 Nm.
5. Tighten the two fixings tie bar to steering box,
81
Nm.
6. Recheck steering wheel torque to turn. If torque
reading is still greater than specified, carry out
steering shaft universal joint lubrication.
Lower steering shaft universal joint lubrication
1. Check lower steering shaft is correctly phased.
See Repair, Lower Steering Shaft and
Universal Joints
2. Lubricate universal joints with an anti-seizure
type penetrating spray. Work the joints to ensure
full penetration of the spray by driving vehicle
and steering from lock to lock.
3. If steering stiffness still persists carry out swivel
pin preload setting.
Swivel pin preload setting
The swivel pin preload setting must be checked and
set following the workshop manual procedure.
1. NON ABS vehicles.
See FRONT AXLE AND
FINAL DRIVE, Overhaul, Front Stub Axle,
Constant Velocity Joint and Swivel Pin
Housing Non ABS
Note that a pull load of 1.16 - 1.46 kg is required
after the axle shaft and swivel housing seal have
been removed.
2. ABS vehicles.
See FRONT AXLE AND FINAL
DRIVE, Overhaul, Front Stub Axle, Constant
Velocity Joint and Swivel Pin Housing ABS
Note that a torque to turn of 2.0 - 2.8 Nm is
required after the axle shaft and swivel housing
seal have been removed.
3. If steering stiffness still persists carry out
steering column alignment.
