GMC 1990 Light Truck Repair Manual page 131

L. Mark Top of
Pressure Plate
6. O-Ring Seal
7. Pressure Plate
Figure 42—Installing of the Pressure Plate
10. Rotor
M. The Counterbore
Faces Drive Shaft
End o f Housing
Figure 43— Installing the Rotor
N. Housing Alignm ent
Indentations
P . Identification Marks
on Pump Ring
12. O-Ring Seal
Figure 44— Aligning and Installing the Pump Ring
POWER STEERING 3B3-17
6. O-ring seal (6) (figure 42).
7. Pressure plate (7). Mark top of pressure plate
directly over the pin hole in the plate.
8. Dowel pin (8).
Important
• Lubricate the O-ring (12), pump ring (11), rotor
(10), and vanes (9) with power steering fluid.
9. Vane (9). The rounded edge of the vanes face
away from the rotor.
10. Rotor (10). Make sure the counterbore faces the
driveshaft end of the housing (figure 43).
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11. Pump ring (11). Make sure the identification marks
face up (figure 44).
12. O-ring seal (12).
13. Thrust plate (13).
• The dimples in the thrust plate should line up
with the bolt holes in the housing and that the
thrust plate engages the pump ring dowel pins.
14. Retaining ring (14).
• Use a press to compress the thrust plate (fig­
ure 45).
• Opening of ring (14) centered with bolt hole
nearest to access hole.
15. Driveshaft seal (16).
• Use a suitable socket to press seal into hous­
ing until it bottoms (figure 34).
16. Bearing (18) onto the driveshaft (17) (figure 33).
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• Slide the assembly into the housing while
rotating the driveshaft so that the shaft serra­
tions engage with the rotor.
17. Retaining ring (19). Use a suitable pair of snap
ring pliers (figure 32).
• Make sure the beveled side of ring (19) is
properly located.
18. Flow control spring (20).
19. Flow control valve (21).
20. O-ring seal (22).
21. O-ring (25).
22. Reservoir (24) (figure 30).
23. Clips (26) (figure 29).
SAGINAW POWER
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STEERING P U M P -
Remove or Disconnect (Figure 46)
• Clean the exterior of the pump with solvent and
blow dry.
1. Bolt (71) and fitting (73).
2. Reservoir (70) and seals (69).
3. End plate retaining ring (68) using a screwdriver
and punch.
4. End plate (67) and pressure plate spring (66).
5. O-ring (60).
6. Control valve (58).
7. Control valve spring (59).
MODEL P
DISASSEMBLY