Overhaul
P/S Pump Disassembly And AssemblyDisassembly
1. Clean its exterior thoroughly.
2. With aluminum plates placed on vise first, grip pump body with it.
3. Remove suction connector bolt (1), suction connector (2) and O-ring (3) from pump body (4).
4. Remove power steering pressure switch (terminal set) (5) from pump body.
5. Remove plug (6), flow control spring (8) and relief valve (flow control valve) (9) from pump body.
6. Remove cover bolts (7), pump cover (10) and O-ring (17) from pump body.
7. Remove snap ring (12) from pump shaft.
8. Remove vanes (13) from rotor (14).
9. Remove cam ring (15), rotor (14), side plate (16) and O-rings (11) from pump body.
10. Pull out pulley (18) from pump body.
11. Remove oil seal (19) from pump body.
Assembly
Reverse disassembly procedure for assembly, noting the following.
1. Apply grease to oil seal lip (1). Apply power steering fluid to sliding surface of the shaft (2) and then insert shaft in the pump body.
"A" Grease 99000-25010
2. Apply power steering fluid to O-rings (1) and fit them to pump body.
3. Install side plate (1) to pump body.
NOTE: Carefully align the dowel pins on the side plate (1) at bolt hole (2) as shown in figure.
4. Apply power steering fluid to sliding surface of rotor (1).
5. Install rotor to shaft, directing dot (3) marked side of rotor facing up.
6. Install new snap ring (2) to shaft, then make sure to fit snap ring into shaft groove securely.
NOTE: Never reuse the removed snap ring.
7. Apply power steering fluid to sliding surface of cam ring (1).
8. Install cam ring to pump body. The tapered end of cam ring (1) should face the side plate (2).
9. Apply power steering fluid to each vane (2).
10. Install vanes (12 pieces) (2) to rotor (1).
11. Apply power steering fluid to O-ring (1).
12. Install O-ring (1) to pump body.
13. Apply power steering fluid to sliding surface of pump cover and rotor.
14. Match the dowel pins (1) to the holes of the cover plate (2) as shown and install pump cover to pump body.
15. Gradually tighten pump cover bolts to specified torque.
NOTE: After installing pump cover (1), check to make sure that shaft can be turned by hand.
Tightening torque
Pump cover bolts (a): 28 Nm (2.8 kgf-m, 20.0 ft. lbs.)
16. Apply power steering fluid to O-ring of terminal switch.
17. Install pressure switch (1) to pump body.
Tightening torque
Pressure switch (b): 28 Nm (2.8 kgf-m, 20.0 ft. lbs.)
18. Apply power steering fluid to relief valve (flow control valve).
19. Install relief valve (flow control valve) to pump body.
20. Install flow control spring.
21. Apply power steering fluid to O-rings of plug.
22. Install O-rings to plug.
23. Tighten plug (1) to specified torque.
Tightening torque
Plug (c): 60 Nm (6.0 kgf-m, 43.5 ft. lbs.)
24. Apply power steering fluid to O-ring (2), and install O-ring to suction connector (1).
25. Install suction connector (1) to pump body as shown in figure. Tighten suction connector bolt to specified torque.
Tightening torque
Suction connector bolt (d): 12 Nm (1.2 kgf-m, 8.5 ft. lbs.)