Exploded View

Replace the pump as an assembly if the parts indicated with an asterisk (*) are worn or damaged.

Fig 1: Exploded View Of Pump With Torque Specifications

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Special Tools Required 

• Attachment, 28 x 30 mm 07946-1870100
• Driver 07749-0010000
• Pulley holder 07ZAB-S5A0100

Disassembly 

1. Drain the fluid from the pump (see FLUID REPLACEMENT  ).
2. Remove the power steering pump (see PUMP REPLACEMENT  ).
3. Hold the steering pump (A) in a vise with soft jaws (B), hold the pulley (C) with the pulley holder (D), and remove the pulley nut (E) and pulley. Be careful not to damage the pump housing with the jaws of the vise.
   Fig 2: Removing Pulley Nut And Pulley

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Remove the inlet joint and the O-ring.
5. Remove the pressure control valve cap, O-ring, valve spring, and the pressure control valve.
6. Remove the pump housing cap, O-ring, and the pump preload spring.
7. Remove the pump cover, O-ring, and the pump cover seals.
8. Pull out the roll pin.
9. Remove the outer case, cam ring, rotor, vanes, and the side plate.
10. Remove the rubber seal and the slipper seal from the outer case.
11. Remove the O-rings from the bottom of the housing.
12. Remove the 40 mm internal snap ring, then remove the driveshaft by tapping the shaft end with a plastic hammer.
13. Remove the seal from the pump housing.

    Inspection 

14. Check the pressure control valve for wear, burrs, and other damage to the edges of the grooves in the valve.
    Fig 3: Identifying Pressure Control Valve

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
15. Inspect the bore of the pressure control valve on the pump housing for scratches and wear.
16. Slip the pressure control valve back in the pump housing, and check that it moves in and out smoothly. If OK, go to step 17; if not, replace the pump as an assembly. The pressure control valve is not available separately.
    Fig 4: Checking Pressure Control Valve Movement

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
17. Attach a hose (A) to the end of the pressure control valve (B) as shown. Then submerge the pressure control valve in a container of power steering fluid or solvent (C), and blow in the hose.
    • If air bubbles leak through the valve at less than 98 kPa (1.0 kgf/cm² , 14.2 psi), replace the pump as an assembly. The pressure control valve is not available separately.
    • If the pressure control valve is OK, set it aside for reassembly later.
      Fig 5: Checking Pressure Control Valve Operation

      Courtesy of AMERICAN HONDA MOTOR CO., INC.
18. Inspect the ball bearing by rotating the outer race slowly. If you feel any play (axial or radial) or roughness, remove the faulty ball bearing (A), and install a new one (B).
    Fig 6: Removing Bearing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
19. Inspect each part shown with an asterisk in the Exploded View; if any of them are worn or damaged, replace the pump as an assembly.

    Reassembly 

20. Install a new pump seal (A) (with its grooved side facing in) into the pump housing (B) by hand, then drive it in using the driver until the seal is fully seated in the pump housing. Do not apply more than 1,370 N (140 kgf, 308 lbf) of pressure.
    Fig 7: Identifying Pump Seal And Pump Housing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
21. Position the pump driveshaft (A) in the pump housing, then press it in with the appropriate size socket wrench (B) as shown.
    Fig 8: Installing Pump Driveshaft

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
22. Install the 40 mm internal snap ring (C) with its radiused edge facing out.
23. Coat a new 23.8 mm O-ring (A) with power steering fluid, then position it on the bottom (B) of the pump housing.
    Fig 9: Identifying O-Ring

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
24. Coat new cover seals (A) and a new 13.0 mm O-ring (B) with power steering fluid, then position them into the grooves on the cover (C).
    NOTE: Be careful not to install the inlet joint O-ring because they are the same size.
    Fig 10: Identifying Cover Seals, O-Ring And Cover

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
25. Install the outer case (A) by aligning the slot (B) inside the outer case with the cover roll pin hole (C). Be sure that the tapered side (D) of outer case is facing up.
    Fig 11: Identifying Outer Case, Slot And Cover Roll Pin Hole

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
26. Apply power steering fluid to the rubber seal (E) (black), and install it in the slot (F) of the outer case.
27. Apply power steering fluid to the slipper seal (G) (white), and install it on top of the rubber seal you just installed.
28. Install the cam ring (A) by aligning the slot (B) with the slot (C) in the outer case.
    Fig 12: Pushing Roll Pin Into Set Hole

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
29. Insert the roll pin (D) into the slots between the cam ring and the outer case, then push the roll pin into the set hole (E).
30. Install the rotor (A) in the cam ring (B).
    Fig 13: Identifying Rotor, Cam Ring And Vanes

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
31. Set the 11 vanes (C) in the grooves in the rotor. Make sure that the gold color ends (D) of the vanes are in contact with the sliding surface of the cam ring.
32. Place the side plate (A) on the cam ring, and align the roll pin set hole (B) with the roll pin (C).
    Fig 14: Identifying Side Plate, Roll Pin Set Hole And Roll Pin

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
33. Coat a new O-ring (D) with power steering fluid, then position it into the groove on the side plate.
34. Install the pump housing (A) over the cover assembly (B).
    Fig 15: Identifying Pump Housing And Cover Assembly

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
35. Align the bolt holes in the cover (A) with the threaded holes in the pump housing. Install the flange bolts loosely first, then torque the flange bolts in a criss-cross pattern in two or more steps.
    Fig 16: Cover With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
36. Push in the cam ring (A) from the pump housing cap hole (B) with a flat-tip screwdriver to make sure the cam ring is fully seated against the outer case.
    Fig 17: Pushing Cam Ring

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
37. Install the pump preload spring (A) in the pump housing.
    Fig 18: Pump Preload Spring, O-Ring And Pump Housing Cap With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
38. Coat a new 12.7 mm O-ring (B) with power steering fluid, and install it on the pump housing cap (C).
39. Install the pump housing cap on the pump housing, and tighten it to the specified torque.
40. Install the pressure control valve spring (A) in the pump housing.
    Fig 19: Pressure Control Valve Spring, Pressure Control Valve And O-Ring With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
41. Coat the pressure control valve (B) with power steering fluid, and install it in the pump housing.
42. Coat a new 16.7 mm O-ring (C) with power steering fluid, and install it on the pressure control valve cap (D).
43. Install the pressure control valve cap on the pump housing, and tighten it to the specified torque.
44. Coat a new O-ring (A) with power steering fluid, and install it on the inlet joint (B).
    Fig 20: O-Ring And Inlet Joint With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
45. Install the inlet joint on the pump housing.
46. Install the pulley (A), then loosely install the pulley nut (B). Hold the steering pump in a vise with soft jaws (C). Be careful not to damage the pump housing with the jaws of the vise.
    Fig 21: Installing Pulley With Torque Specifications

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
47. Hold the pulley with the pulley holder, and tighten the pulley nut to the specified torque.
48. Check that the pump turns smoothly by turning the pulley. If it turns hard, loosen the four flange bolts on the cover, then retighten them as in step  35, and check the pump again.