7-S8
L2800, L3400, WSM
STEERING
Relief Valve
1. Loosen the lock nut (5) and remove the adjusting screw (4).
2. Take out the spring (2) and poppet (1).
(When reassembling)
• Apply grease to O-ring (3).
• Be sure to adjust the relief valve pressure. (See page 8-S8.)
W1021917
[4] SERVICING
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.
W10197750
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.
W10196700
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.
W10195610
Tightening torque Lock nut
49.1 to78.5 N·m
5.0 to 8.0 kgf·m
36.2 to 57.9 ft-lbs
(1) poppet
(2) Spring
(3) O-ring
(4) Adjusting Screw
(5) Lock Nut
Backlash between
sector gear and ball nut
Factory spec.
0.3 mm
0.012 in.
Clearance between
valve housing and spool
Factory spec.
0.17 to 0.28 mm
0.0067 to 0.0110 in.
Allowable limit
0.4 mm
0.0157 in.
Clearance between gear
box and ball nut
Factory spec.
0.035 to 0.08 mm
0.0013 to 0.0031 in.
Allowable limit
0.15 mm
0.0059 in.
Tractor Manuals Scotland - Please Do Not Copy