Automatic Transmission - GMC T Series 1994 Repair Manual

NOTICE:
Repair the steering gear in a clean, dust-free location, using clean tools and equipment. Dirt or grit will damage
the machined surfaces and result in leaking or damage to the steering gear assembly. If broken components or foreign
materials are found while disassembling the gear, the hydraulic system should be disassembled, inspected, cleaned, and
flushed. In some instances, "power steering hydraulic fluid" will be specified to lubricate parts upon assembly. In these
cases, GM hydraulic fluid should be used. Do not use brake fluid, automatic transmission fluid, or other non-approved fluids.
NOTICE:
When fasteners are removed, always reinstall them at the same location from which they were removed.
If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct part number
fastener is not available, a fastener of equal size and strength (or stronger) may be used. Fasteners that are not reused and
those requiring thread locking compound will be called out. The correct torque value must be used when installing
fasteners that require it. If the above conditions are not followed, parts or system damage could result.
Subsection A: 708 Power Steering Gear
708 Power Steering Gear Assembly..................... 3B1 A-2
Steering Gear Adjustments...................... ............. 3B1 A-3
Worm Thrust Bearing Preload Adjustment.... 3B1A-3
Pitman Shaft Over-Center Preload Adjustment ..3B1A-4
Steering Gear Service............................................ 3B1A-5
Pitman Shaft and Side Cover Replacement.... 3B1 A-5
Housing End Plug Replacement...................... 3B1A-6
Adjuster Plug Assembly Replacement............3B1A-7
Valve Replacement........................................... 3B1A-8
Rack Piston and Worm Shaft Replacement.... 3B1A-9
Pitman Shaft Seals and Bearing Replacement ..3B1 A-l 1
Check Valve Replacement..............................3B1 A -12
SECTION 3B1A
POWER STEERING GEAR
UNIT REPAIR
CONTENTS
Subsection B: 710 Power Steering Gear
710 Power Steering Gear Assembly................... 3B1 A-13
710 Power Steering Gear Service....................... 3B1 A -13
Gear Disassembly.................................................3B1A-14
Adjuster P lu g ........................................................3B1A-17
Valve and Stub S h aft............................................3B1 A-20
Pitman Shaft and Side Cover...............................3B1A-21
Primary Rack Piston.............................................3B1A-22
Steering Gear Connectors.................................... 3B1A-23
Pitman Shaft Bearing and
Seal Replacement..................................................3B1 A-23
Gear Reassembly..................................................3B1 A-24
Gear Service Adjustments................................... 3B1A-27
Specifications........................................................3B1A-28
Fluid Specification...........................................3B1 A-28
Fastener Tightening Specifications................3B1 A-28
Adjustment Tightening Specifications...........3B1 A-28
Special T ools........................................................3B1A-29