Specifications

Vehicle System Testing & Adjusting 79
Steering Knuckle Bearing Preload
Adjustment
Steering Knuckle Bearing Preload Adjustment
(6) Steering link. (7) Shims. (8) Cover. (9) Bolts.
1. During assembly of the steering knuckle, install
the upper bearing cup, cone and seal.
2. Install lower bearing group cover (8) without
shims. Tighten two opposed cover bolts (9) to a
torque of 5.6 N·m (50 lb·in).
3. Measure the clearance between cover (8) and
the axle beam at each bolt with a feeler gauge.
4. Take an average of the measurements found in
Step 3. Select shims (7) equal in thickness to the
average clearance.
5. Remove the bearing group and install shims (7),
cover (8) and bolts (9). Tighten bolts (9) to a
torque of 55±6 N·m (40±5 lb·ft).
6. With steering links (6) disconnected from the
steering cylinder, check knuckle for 4.5 to 6.8
N·m(40 to 60 lb·in) of rolling torque. Add or
remove shims from cover (8) to obtain the proper
rolling torque.
7. Connect links (6) to the steering cylinder. Tighten
cylinder mounting bolts (5) to a torque of 460 ±
60 N·m (340 ± 40 lb·ft).
Steering System Pressure Check
If the steering system does not work correctly,
check the hydraulic tank for the correct oil level and
the hoses and connections for leakage. If all these
items are correct, use the Pressure Gauge Kit to
check the steering hydraulic system and its relief
pressure setting.
Hydraulic Steering Gear
(1) Elbow (Pressure line from priority valve).
WARNING
Hydraulic pressure can cause personal injury.
Before any steering system hydraulic lines or
components are disconnected, make sure all
hydraulic pressure is released in the steering
system. Move the steer wheels to the left and
right and then to the straight forward direction.
Check steering system relief pressure as follows:
1. Turn the engine off.
2. Remove plug from elbow(1)
Install pressure-checking adapter(4) and connect
pressure-tube (5) and pressure gage (6).
Pressure gage(6) has a range of 28,000 kpa
(4,000psi).
3. Move the seat to the normal position for
operation, turn the key switch to the ON position
and activate the hydraulic controls until the oil is
at a temper-ature for normal operation.
4. Turn the steer wheels to the left or right against
the stops and make a note of the indication on
the pressure gauge.
5. The indication on the pressure gauge must be
the priority valve relief setting of 9000 + 300 kPa
(1305+43.5 psi). If the indication is correct and a
problem exists, then there is possibly a
mechanical failure in the steering system.
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