GMC 1982 Light Duty Truck Service Manual page 276

3B3-20 POWER STEERING SYSTEM
G E N E R A L D E S C R IP T IO N
This Integral Power Steering Gear has a
control valve which directs oil to either side
of the rack piston. The rack piston converts
hydraulic power into mechanical force. This
force is transmitted to the mating pitman
shaft teeth, through the pitman shaft to the
steering linkage.
K e y No. P a r t N a m e
1 -H O U S IN G , STEERING GEAR
2 - RETAINER, STRG. C O U P LIN G SHIELD
3 -B E A R IN G A S S Y , NEEDLE (STUB SHAFT)
4 - SEAL, STUB SHAFT
5 -S E A L , STUB SHAFT DUST
6 - RING, R E TA IN IN G (STUB SHAFT SEAL)
7 -B E A R IN G A S S Y , NEEDLE (P IT M A N SHAFT)
8 -S E A L , P IT M A N SHAFT
9 -W A S H E R , SEAL B AC K-UP (P IT M A N SHAFT)
1 0-S E A L, P IT M A N SHAFT DUST
1 1 -R IN G , R E TA IN IN G (P IT M A N SHAFT SEAL)
1 2-W A S H E R , LOCK (P IT M A N SHAFT)
1 3 - NUT, P IT M A N A R M
1 4 - B EA RING ASSY , RACE & UPPER
1 5 -R IN G , V ALV E BODY (3)
1 6 - SEAL, " O " R IN G (V A LV E BO D Y) (3)
1 7 - BODY ASSY., V ALVE
18-S E A L, 0 " RING ID A M P N E R )
1 9-SP O O L, V ALVE
POWER STEERING GEAR (605 MODEL)
R ou nd sid e c o v e r — he ld in
p lace w ith re ta in in g ring —T
ifffh r
(60 5 M O D E L )
K e y No. P a r t N a m e
2 0 - SHAFT ASSY , STUB
2 1 -S E A L , " O " RING (SHAFT TO W O R M )
2 2 -W O R M ASSY., PIN & STRG.
2 3 -R IN G , R E TA IN IN G (SHAFT TO W O RM )
2 4 -R IN G , RACK PISTON
2 5 -S E A L , " O " RING (RACK PISTON)
26 - RACK-PISTO N-NUT
2 7 -B E A R IN G A S S Y , SUPPORT & LWR. THR
"O"
2 8 -S E A L , RING (ADJUSTER PLUG)
2 9 -P L U G , ADJUSTER
3 0 -N U T , ADJUSTER LOCK
31 - SPRING, SIDE COVER
3 2 -S E A L , " O " RING (SIDE COVER)
3 3 -G E A R ASSY , P IT M A N
3 4 -C O V E R , ASSY., H O U S IN G SIDE
3 5 -R IN G , R E TA IN IN G (SIDE COVER)
3 6 -N U T , PRELOAD ADJUSTER SEALING
3 7 -C O N N E C T O R , INVERTED FLARE (2)
Fig. 3B3-51 --Overhaul 605 G ear, C hart A
Whenever a part which forms a
sealing surface for an " O " ring seal is
removed, the " O" ring seal should also be
removed and replaced with a new seal.
Whenever one of the Pitman shaft or stub
shaft seals are removed all adjacent seals
should be removed and replaced with new
seals. Lubricate all new seals with power
steering fluid to ease assembly.
SHAFT