Steering Gear Box - wsm L3301 Workshop Manual

L3301, L3901, L4701, WSM

(2) Steering Gear Box

Backlash between Sector Gear and Ball Nut
1. Set a dial indicator with its finger on the pitman arm.
2. Move the pitman arm lightly, and measure the pitman arm
deflection.
3. If the measurement is not within the factory specifications,
adjust the backlash with the adjusting screw.
Backlash between sector
Factory specification
gear and ball nut
Clearance between Valve Housing and Sleeve
1. Measure the sleeve O.D. with an outside micrometer.
2. Measure the valve housing I.D. with a caliper gauge.
3. If the clearance exceeds the allowable limit, replace the steering
gear box assembly.
Factory specification
Clearance between
valve housing and spool
Allowable limit
Clearance between Gear Box and Ball Nut
1. Measure the gear box cylinder I.D. with a cylinder gauge.
2. Measure the ball nut O.D. with an outside micrometer.
3. If the clearance exceeds the factory specifications, replace the
steering gear box assembly.
Factory specification
Clearance between gear
box and ball nut
Allowable limit
Axial Play of Ball Nut Assembly
1. Set a dial indicator with its finger on the worm shaft of the ball
nut assembly.
2. Move the worm shaft axially and measure the play.
3. If the play exceeds the allowable limit, replace the steering gear
box assembly.
NOTE
• Check ball nut assembly for smooth rotation by holding the
ball nut horizontally, and slowly rotating the worm shaft. If
rotation is not smooth, replace the steering gear box
assembly.
Factory specification
Axial play of ball nut
assembly
Allowable limit
7-S21
STEERING
0.3 mm
0.01 in.
9Y1211012STS0031US0
0.17 to 0.28 mm
0.0067 to 0.011 in.
0.4 mm
0.02 in.
9Y1211012STS0032US0
0.035 to 0.080 mm
0.0014 to 0.0031 in.
0.15 mm
0.0059 in.
9Y1211012STS0033US0
0.02 mm
0.0008 in.
0.04 mm
0.001 in.
9Y1211012STS0034US0
KiSC issued 09, 2016 A