Pitman Shaft And Side Cover - GMC C Series 1993 Repair Manual

3B1A-10 POWER STEERING GEAR UNIT REPAIR
Assemble
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• Lubricate new rings (27) and seals (26).
New seals (26) in the ring grooves.
1.
2. New rings |(27) in the grooves over the seals (26).
• Lubricate valve spool seal (29).
Seal (29) over the valve spool.
3.
• Lubricate the valve spool and the valve
body ( 2 8 ) . , .
4.
(see Figure 21). .
• Rotate the valve spool while pushing it
into the valve body. Push until the shaft
pin hole is visible from the opposite end
(see Figure 24):
• Lubricate the stub shaft (31) assembly.
5. (31) assembly into the valve spool
S tu b s h a ft
until the shaft pin can be placed into the valve spool
(see Figure 22).
• Align the notch in the shaft cap with the pini
in the valve body (28).
Important
9
Make sure that the shaft cap notch is rnatejd
with the valve body pin before installing thb
Valve body into the gear assembly.
6. Valve spool and shaft (31) assembly into the?;valvp
body (28). The shaft cap should be below the valve
body notch (see Figure 25).
• Lubricate a new shaft cap to the seal (32).! j
New shaft cap and seal (32) into the valye body (28)
7.
assembly.

PITMAN SHAFT AND SIDE COVER

Figure 1
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Inspect
Bearing in side cover (3). Needles should
rotate freely using finger pressure. Replace
bearing and side cover (3) if necessary ,
Bearings' surface in the side cover (3) for
scoring. Replace side cover assembly if
necessary. r
Sealing and bearing surfaces o f the pitman
; shaft (5) for roughness, n icks, or other dabiageU
Replace pitman shaft assembly if necessary .;
Pitman shaft (5) for excessive wear .or
scoring. Check sector gear teeth for wear.
R eplace the pitman shaft assem bly if
necessary..'/
Pitman shaft (5) adjuster screw threads for
wear. The adjuster screw must be free to turn
with no end play.
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A-BAR, TORSION
31 - SHAFT, STUB
Figure 23 Stub Shaft Assembly
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A-SHAFT PIN HOLE
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B-VALVE, SPOOL
2 8 -BODY; VALVE
Figure 24. Installing the Valve Spool in the Valve Body
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A - NOTCH IN END CAP MUST FULLY ENGAGE
PIN PROJECTING INTO VALVE BODY
Figurb 25, Assembling the!Stub Shaft Cap and Valve Body
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