Isuzu N-Series. Service manual — part 127
POWER STEERING 3B1-27
Power Steering Pump (4J Series Engine)
Disassembly
Preparation
Clean oil pump with solvent (its plug discharge and suc-
tion port to prevent the entry of solvent). Be careful not
to expose the oil seal of shaft assembly to solvent.
1. Bolt
2. Pipe, Suction
3. O-ring
4. Connector
5. O-ring
6. Valve
7. Retaining Ring
8. Filter
9. Spring
10. Retaining Ring
11. Shaft Assembly
12. Bearing
13. Shaft
14. Retaining Ring
15. Oil Seal
Legend
1. Bolt
15. Retaining ring
2. Pipe, suction
16. Oil seal
3. O-ring
17. Bolt
4. Connector
18. Rear housing assembly and pump cartridge
5. Connector
19. Gasket
6. O-ring
20. O-ring
7. Valve
21. O-ring
8. Retaining ring
22. Front housing
9. Filter
23. Pressure plate
10. Spring
24. Rotor and vane
11. Snap ring
25. Cam
12. Shaft assembly
26. Pin
13. Bearing
27. Rear housing
14. Shaft
N3A0222E
3B1-28 POWER STEERING
Caution:
When removing the oil seal, be careful not to damage
the housing.
16. Bolt
17. Rear Housing Assembly and Pump Cartridge
18. Gasket
19. O-ring
20. O-ring
21. Front Housing
22. Pressure Plate
23. Rotor and Vane
24. Cam
25. Pin
26. Rear Housing
Inspection and Repair
Make the necessary adjustments, repairs, and part re-
placements if excessive wear or damage is discovered
during inspection.
Reassembly
1. Rear Housing
2. Pin
3. Cam
4. Rotor and Vane
Install the vane with curved face in contact with the
inner wall of the cam.
5. Pressure Plate
Caution:
When install pressure plate, be careful not to damage its
inner surface. Damaged pressure plate may cause poor
pump performance, pump seizure or oil leakage.
6. Front Housing
7. O-ring
Be sure to discard used parts, and always use new
parts for installation.
8. O-ring
Be sure to discard used parts, and always use new
parts for installation.
9. Gasket
Be sure to discard used parts, and always use new
parts for installation.
10. Rear Housing Assembly and Pump Cartridge
11. Bolt
Tighten:
• Rear housing bolt to 54 N
⋅m (5.5 kg⋅m / 40 lb⋅ft)
12. Oil Seal
Be sure to discard used parts, and always use new
parts for installation.
Caution:
When install pressure plate, be careful not to damage its
inner surface. Damaged pressure plate may cause poor
pump performance, pump seizure or oil leakage.
13. Retaining Ring
14. Shaft
15. Bearing
16. Shaft Assembly
17. Retaining Ring
18. Spring
19. Filter
20. Retaining Ring
21. Valve
22. O-ring
Be sure to discard used parts, and always use new
parts for installation.
23. Connector
Tighten:
• Connector to 54 N
⋅m (5.5 kg⋅m / 40 lb⋅ft)
24. O-ring
Be sure to discard used parts, and always use new
parts for installation.
25. Pipe, Suction
26. Bolt
Tighten:
• Suction pipe bolt to 21 N
⋅m (2.1 kg⋅m / 15 lb⋅ft)
N3A0224E
POWER STEERING 3B1-29
Power Steering Pump (4H Series Engine without Hydraulic Booster Brake)
Disassembly
1. Suction Pipe
2. O-ring
3. Bolt
4. Rear Cover
5. Pin
6. Bushing
7. Cartridge Assembly
8. O-ring
9. Side Plate
10. O-ring
11. O-ring
Legend
1. Suction pipe
10. Side plate
2. O-ring
11. O-ring
3. Body and gear
12. O-ring
4. Bolt
13. Pin
5. Rear cover
14. Connector
6. Pin
15. O-ring
7. Bushing
16. O-ring
8. Cartridge assembly
17. Valve assembly
9. O-ring
18. Spring
N3A0464E
3B1-30 POWER STEERING
12. Pin
Caution:
When removing the oil seat, be careful not to damage
the housing.
13. Connector
14. O-ring
15. O-ring
16. Valve Assembly
17. Spring
18. Body and gear
Inspection and Repair
Make the necessary adjustments, repairs, and part re-
placements if excessive wear or damage is discovered
during inspection.
Reassembly
1. Body and gear
2. Spring
3. Valve Assembly
4. O-ring
5. O-ring
6. Connector
Tighten:
• Connector to 49 N
⋅m (5 kg⋅m / 36 lb⋅ft)
7. Pin
8. O-ring
9. O-ring
10. Cartridge Assembly
Install the vane with curved face in contact with the
inner wall of the cam.
11. O-ring
12. Pin
13. Side Plate
14. Bushing
15. Rear Cover
16. Bolt
Tighten:
• Rear cover bolt to 20 N
⋅m (2 kg⋅m / 14 lb⋅ft)
17. O-ring
18. Suction Pipe
Tighten:
• Suction pipe bolt to 8 N
⋅m (0.8 kg⋅m / 69 lb⋅in)
N3A0224E
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