Pitman Shaft Seals And Bearing Replacement - GMC T Series 1994 Repair Manual

Rack piston (26) to worm shaft (13) from J 21552,
10.
using J 8947 to compress seals.
• Hold J 21552 tightly against worm shaft and
turn stub shaft clockwise until rack piston
(26) is seated on worm shaft (13).
|
9
| Important
• Make sure that all rack piston balls (25) are
reinstalled in the rack piston. Improper rack
piston ball installation may result in personal
injury.
11. Rack piston plug (27).
Tighten
• Rack piston plug (27) to 150 N*m
(111 lb. ft.).
12. Housing end plug. Refer to "Housing End Plug
Replacement" in this section.
13. Pitman shaft and side cover. Refer to "Pitman Shaft
and Side Cover Replacement" in this section.
Adjust
• Steering gear. Refer to "Steering Gear
Adjustments" in Section 3B.
Install or Connect
Steering gear. Refer to "Power Steering Gear
Replacement" in Section 3B.
PITMAN SHAFT SEALS AND BEARING
REPLACEMENT
Figures 1 and 2
This procedure covers the seal and bearing replacement for
steering gears. The steering gear uses one single lip seal and
one double lip seal. Seals may be replaced without
removing the power steering gear. Refer to "On Vehicle
Service."
Tools Required:
J 6278 Pitman Shaft Bearing Remover and
Installer
J 6219 Pitman Shaft Oil Seal Installer
J 4245 Internal Snap Ring Pliers
+ + Remove or Disconnect
• Pitman arm from steering gear. Refer to "Steering
Linkage" in Section 3B3.
Clean
• Exposed end of pitman shaft (12) and
housing (20).
• Use a wire brush to clean pitman shaft splines.
Disassemble
*
1. Retaining ring (35) using J 4245.
Notice:
Use care not to score the housing bore when
prying out seals and washers.
2 Backup washer (33), and double lip seal (32) using
.
a screwdriver to pry them from the housing (20).
3.
Backup washer (31) and single lip seal (30) using a
screwdriver.
Inspect
• Housing (20) for burrs and remove if
necessary.
4. Needle bearing (28).
• Insert J 6278 through the hole in the top of the
housing (20) and drive out bearing (28).
Assemble
*
Coat double lip seal (32) and washer (33) with white
petroleum grease.
1. Needle bearing (28) to housing (20) using J 6278.
2. Single lip seal (30) using J 6219.
3. Backup washer (31).
4. Double lip seal (32).
5. Backup washer (33).
6. Retaining ring (35) using J 4245.
7. Pitman shaft and side cover. Refer to "Pitman Shaft
and Side Cover Replacement" in this section.
Notice:
Pack the small cavity between seals (30 and 32)
with white petroleum grease before reinstalling pitman
shaft (12). Packing this area will help prevent early seal
leaks by eliminating moisture accumulation, and rust on
the pitman shaft.
Install or Connect
• Pitman arm to steering gear. Refer to "Steering
Linkage" in Section 3B3.