User's Manual
2
SD-30-4265
TABLE OF CONTENTS
DESCRIPTION .............................................................. 1
OPERATION.................................................................. 1
General ........................................................................ 1
Mechanical .................................................................. 3
Hydraulic ..................................................................... 4
Rotary Control Valve .................................................... 4
Steering Limiting Valve ................................................ 7
Pressure Relief Valve ................................................... 8
Bypass Valve ............................................................... 8
POWER STEERING IDENTIFICATION ......................... 8
PREVENTIVE MAINTENANCE ..................................... 8
Power Steering Oil ....................................................... 8
Draining and Filling the System ................................... 8
Oil Change Intervals .................................................... 8
Output Shaft Sector Teeth Adjustment .......................... 8
Output Shaft Boot & Dust Seals ................................... 9
CAUTION NOTE ........................................................... 9
REMOVAL ..................................................................... 9
SPECIAL TOOLS .......................................................... 9
DISASSEMBLY .............................................................11
General .......................................................................11
Output Shaft Removal .................................................11
Piston ........................................................................ 13
Main Housing & Side Cover ....................................... 15
Valve Body & Spindle ................................................ 16
Output Shaft .............................................................. 18
Pressure Relief & Bypass Valve ................................ 18
Spindle ...................................................................... 18
CLEANING & INSPECTION ........................................ 19
REASSEMBLY ............................................................. 19
General ...................................................................... 19
Valve Body & Spindle ................................................ 19
Piston ........................................................................ 21
Housing ..................................................................... 24
Output Shaft & Side Cover......................................... 25
ADJUSTMENT ............................................................ 26
Piston to Output Shaft Gear Backlash ........................ 26
Stroke Limiting Stem .................................................. 27
ON-VEHICLE POWER STEERING TESTS ................ 27
Preliminary ................................................................ 28
Pressure Relief Valve ................................................. 28
Internal Leakage ........................................................ 28
TECHNICAL DATA ...................................................... 29
ASSEMBLY TORQUE CHART .................................... 29
TROUBLESHOOTING ................................................ 30