Exploded View

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

Fig 1: Exploded View Of Pump

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Special Tools Required 

• Attachment, 28 x 35 mm 07946-1870100
• Driver 07749-0010000
• Pulley holder 07ZAB-S5A0100

Disassembly 

1. Drain the fluid from the pump.
2. Remove the power steering pump (see PUMP REPLACEMENT  ).
3. Hold the power steering pump (A) in a vise with soft jaws (B), then hold the pulley (C) with the special tool (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 (E) And Pulley

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Remove the inlet joint and O-ring.
5. Loosen the flow control valve cap with a hex wrench, and remove it and the O-ring, the flow control valve and spring.
6. Remove the pump cover and pump cover seal.
7. Remove the outer side plate, cam ring, rotor, vanes, side plate and O-rings.
8. Remove the snap ring, then remove the subvalve from the pump housing.
9. Remove the snap ring, then remove the pump driveshaft by tapping the shaft end with a plastic hammer.
10. Remove the seal from the pump housing.

    Inspection 

11. Check the flow control valve for wear, burrs, and other damage to the edges of the grooves in the valve.
    Fig 3: Checking Flow Control Valve For Wear, Burrs, And Other Damage

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
12. Inspect the bore of the flow control valve on the pump housing for scratches and wear.
13. Slip the flow control valve back in the pump housing, and check that it moves in and out smoothly. If OK, go to step 14; if not, replace the pump as an assembly. The flow control valve (A) is not available separately.
    Fig 4: Inspecting Bore Of Flow Control Valve On Pump Housing For Scratches And Wear

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
14. Attach a hose (A) to the end of the flow control valve (B) as shown. Then submerge the flow 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 flow control valve is not available separately.
    • If the flow control valve OK, set it aside for reassembly later.
      Fig 5: Attaching A Hose (A) To End Of Flow Control Valve (B)

      Courtesy of AMERICAN HONDA MOTOR CO., INC.
15. 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: Inspecting Ball Bearing By Rotating Outer Race Slowly

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
16. 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 

17. Align the pin (A) of the subvalve (B) with the oil passage (C) in the pump housing, and push the subvalve into place, then install the snap ring (D).
    Fig 7: Aligning Pin (A) Of Subvalve (B) With Oil Passage (C) In Pump Housing, And Pushing Subvalve Into Place And Installing Snap Ring (D)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
18. Install the new pump seal (A) (with its grooved side facing in) into the pump housing (B) by hand first, then drive it in using the special tools with until there is no step at the top of the pump seal, and the seal is fully seated in the pump housing.
    Fig 8: Installing Pump Seal (A)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
19. Position the pump driveshaft (A) in the pump housing, then press it in with the appropriate size socket wrench (B) as shown.
    Fig 9: Positioning Pump Driveshaft (A) In Pump Housing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
20. Install the 40 mm snap ring (C) with its beveled edge facing out.
21. Coat the new pump cover seal (A) with power steering fluid, and install it into the groove in the pump cover (B).
    Fig 10: Installing Pump Cover Seal (A) Into Groove In Pump Cover (B)

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
22. Install the outer side plate (C) over the two roll pins (D).
23. Set the pump cam ring (A) over the two roll pins with its "DOT" mark (B) facing down.
    Fig 11: Installing Outer Side Plate (C) Over Two Roll Pins

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
24. Assemble pump rotor (A) to the pump cover (B).
    Fig 12: Assembling Pump Rotor (A) To Pump Cover

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
25. Set the 10 vanes (C) in the grooves in the rotor. Make sure that the round ends (D) of the vanes are in contact with the sliding surface of the cam ring.
26. Coat the new 15.2 mm O-ring (A) with power steering fluid, and install it into the groove in the side plate (B).
    Fig 13: Installing O-Ring Into Groove In Side Plate

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
27. Install the side plate on the cam ring (C) by aligning the roll pin set holes (D) in the side plate with the roll pins (E).
28. Coat the new 51 mm O-ring (A) with power steering fluid, and position it in the bottom of the pump housing.
    Fig 14: Positioning O-Ring Bottom Of Pump Housing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
29. Install the pump cover assembly (B) in the pump housing. Tighten the bolts to the specified torque alternating in two or more steps.
30. Coat the flow control valve (A) with power steering fluid, then install it and the spring (B) in the pump housing.
    Fig 15: Installing Control Valve (A) And Spring (B) In Pump Housing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
31. Coat the new 16.7 mm O-ring (C) with power steering fluid, and install it on the flow control valve cap (D), then install the cap on the pump housing, and tighten it to the specified torque.
32. Coat the new 13 mm O-ring (A) with power steering fluid, and install it on the inlet joint (B). Install the inlet joint on the pump housing.
    Fig 16: Installing Inlet Joint (B) On Pump Housing

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
33. Install the pulley (A), then loosely install the pulley nut (B). Hold the steering pump in a vise with soft jaws. Be careful not to damage the pump housing with the jaws of the vise.
    Fig 17: Installing Pulley

    Courtesy of AMERICAN HONDA MOTOR CO., INC.
34. Hold the pulley with the special tool, and tighten the pulley nut to the specified torque.
35. Check that the pump turns smoothly by turning the pulley by hand. If it turns hard, loosen the four flange bolts on the cover, then retighten them in same manner as in step  29. Turn the pump again by hand.