Power Steering Controller Body [Only B1820] - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

(3) Power Steering Controller Body [Only B1820]

Clearance between Steering Gear Box and Rack (Piston)
1. Measure the steering gear box cylinder I.D. with a cylinder
gauge.
2. Measure the rack (piston) O.D. with an outside micrometer, and
calculate this clearance.
3. If the clearance exceeds the allowable limit, replace the steering
gear box or rack (piston) assembly.
Factory specification
Clearance between
steering gear box and
rack (piston)
Allowable limit
Clearance between Valve Housing and Sleeve
1. Measure the valve housing I.D. with a cylinder gauge and the
sleeve O.D. with an outside micrometer, and calculate this
clearance.
2. If the clearance exceeds the allowable limit, replace the valve
housing or sleeve assembly.
IMPORTANT
• Check to see if the slipper seals of sleeve do not have
excessive wear
Factory specification
Clearance between
valve housing and sleeve
Allowable limit
Axial Play of Rack (Piston) Assembly
1. Secure the rack (piston) assembly in a vise.
2. Set dial indicator with its finger on the worm shaft of the rack
(piston) assembly.
3. Move the worm shaft axially and measure the play.
4. If the play exceeds the allowable limit, replace the rack (piston)
assembly.
Factory specification
Axial play of rack (piston)
assembly
Allowable limit
Backlash between Sector Gear Shaft and Rack (Piston)
1. Attach the pitman arm having no play.
2. Set a dial indicator with its finger on the pitman arm.
3. Move the pitman arm lightly, and measure the deflection.
4. If the measurement is not within the factory specification, adjust
the backlash with the adjusting screw.
Backlash between sector
gear shaft and rack Factory specification
(piston)
7-S21
STEERING
0.030 to 0.079 mm
0.0012 to 0.0031 in.
0.14 mm
0.0055 in.
9Y1210272STS0032US0
0.17 to 0.28 mm
0.0067 to 0.011 in.
0.40 mm
0.016 in.
9Y1210272STS0033US0
0 to 0.02 mm
0 to 0.0007 in.
0.04 mm
0.002 in.
9Y1210272STS0034US0
Less than
0 .30 mm
0.012 in.
9Y1210272STS0038US0
(EU)
KiSC issued 07, 2011 A