LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2015 >> Pilot EX, FWD >> Repair and Diagnosis >> Steering >> Power Steering >> Hydraulic Power Steering System Components >> Pump Overhaul >> Exploded View >> Disassembly
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Exploded View: Disassembly

  1. Drain the fluid from the power steering pump (see FLUID CHECK/REPLACEMENT  ).
  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 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 1: Identifying Power Steering Pump, Pulley, Jaws, Pulley Holder And Nut
    G08088003Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the inlet joint and 14.8 mm O-ring.
  5. Loosen the flow control valve cap, and remove the cap, 16.7 mm O-ring, flow control valve, and spring.
  6. Remove the pump cover and pump cover seal.
  7. Remove the cam ring, outer case, rotor, vanes, side plate, and 23.8 mm O-ring.
  8. Remove the pump housing cap, 12.7 mm O-ring, and the pump preload spring.
  9. Remove the 40 mm snap ring, then remove the driveshaft by tapping the shaft end with a soft face hammer.
  10. Remove the pump 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 2: Checking Flow Control Valve For Wear, Burrs, And Other Damage To Edges Of Grooves In Valve
    G08088004Courtesy 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 3: Inspecting Flow Control Valve Movement In Pump Housing
    G08088005Courtesy of AMERICAN HONDA MOTOR CO., INC.
  14. Attach a hose (A) to the end of the flow control valve (B) as shown in illustration. Then submerge the flow control valve in a container of power steering fluid (C), and apply compressed air in the hose.
    • If air bubbles leak through the valve at less than 98 kPa (1.00 kgf/cm2 , 14.2 psi), replace the pump as an assembly. The flow control valve is not available separately.
    • If the flow control valve is OK, set it aside for reassembly later.
      Fig 4: Inserting Compressed Air In Hose Towards Flow Control Valve Submerged In Power Steering Fluid
      G08088006Courtesy 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 ball bearing (B).
    Fig 5: Installing Ball Bearing And Driveshaft
    G08088007Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Inspect the driveshaft by rotating the inner race slowly. If you feel any play (axial or radial), remove the worn driveshaft (C), and install a new driveshaft (D).

    Reassembly 

  17. Install the new pump seal (A) (with its grooved side facing in) into the pump housing (B) by hand, then drive it in using the driver handle (C) and the attachment (D) until the pump seal is fully seated in the pump housing. Do not apply more than 1, 370 N (140 kgf, 308 lbf) of pressure.
    Fig 6: Identifying Pump Seal And Housing With Driver Handle And Attachment
    G08088008Courtesy of AMERICAN HONDA MOTOR CO., INC.
  18. Position the driveshaft (A) in the pump housing, then press it in with the appropriate size socket (B) as shown in illustration.
    Fig 7: Pressing Driveshaft In Pump Housing Using Socket
    G08088009Courtesy of AMERICAN HONDA MOTOR CO., INC.
  19. Install the 40 mm snap ring (C) with its radius edge facing out.
  20. Coat the new 23.8 mm O-ring (A) with power steering fluid, then position it on the bottom (B) of the pump housing.
    Fig 8: Identifying O-Ring And Bottom Of Pump Housing
    G08088010Courtesy of AMERICAN HONDA MOTOR CO., INC.
  21. Coat the new cover seal (A) and new 13.0 mm O-rings (B) with power steering fluid, then position them into the grooves on the cover (C).
    Fig 9: Identifying Cover Seal, O-Rings And Cover Of Pump
    G08088011Courtesy of AMERICAN HONDA MOTOR CO., INC.
  22. Install the outer case (A) by aligning the slot (B) inside the outer case with the pump cover roll pin set hole (C).
    Fig 10: Identifying Pump Cover Roll Pin Set Hole, Outer Case, Slot And Roll Pin
    G08088012Courtesy of AMERICAN HONDA MOTOR CO., INC.
  23. Insert the roll pin (D) into the slots between the cam ring and outer case, then push the roll pin into the set hole.
  24. Install the cam ring (A) by aligning the slot (B) with the slot (C) in the outer case.
    Fig 11: Identifying Cam Ring, Slot, Roll Pin And Set Hole With Rubber And Slipper Seal Of Pump
    G08088013Courtesy of AMERICAN HONDA MOTOR CO., INC.
  25. Insert the roll pin (D) into the slots between the cam ring and outer case, then push the roll pin into the set hole (E).
  26. Apply power steering fluid to the new rubber seal (F) (black), and install it in the slot (G) of the cam ring.
  27. Apply power steering fluid to the new slipper seal (H) (white), and install it on top of the rubber seal you just installed.
  28. Install the rotor (A) into the cam ring (B).
    Fig 12: Identifying Rotor, Cam Ring, Vanes And Round End Of Vanes
    G08088014Courtesy of AMERICAN HONDA MOTOR CO., INC.
  29. Set the 11 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.
  30. Place the side plate (A) on the cam ring, and align the roll pin set hole (B) with the roll pin (C).
    Fig 13: Identifying Side Plate, Roll Pin Set Hole, O-Ring And Roll Pin
    G08088015Courtesy of AMERICAN HONDA MOTOR CO., INC.
  31. Coat the new 57.2 mm O-ring (D) with power steering fluid, then position it into the groove on the side plate.
  32. Install the pump housing (A) over the cover assembly (B).
    Fig 14: Identifying Pump Housing And Cover Assembly
    G08088016Courtesy of AMERICAN HONDA MOTOR CO., INC.
  33. 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 to the specified torque alternating in two or more steps.
    Fig 15: Pump Cover And Bolts With Torque Specifications
    G08088017Courtesy of AMERICAN HONDA MOTOR CO., INC.
  34. 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 16: Pushing In Cam Ring From Pump Housing Cap Hole
    G08088018Courtesy of AMERICAN HONDA MOTOR CO., INC.
  35. Install the pump preload spring (A) in the pump housing.
    Fig 17: Pump Preload Spring, O-Ring And Pump Housing Cap With Torque Specifications
    G08088019Courtesy of AMERICAN HONDA MOTOR CO., INC.
  36. Coat the new 12.7 mm O-ring (B) with power steering fluid, and install it on the pump housing cap (C).
  37. Install the pump housing cap on the pump housing, and tighten it to the specified torque.
  38. Install the flow control valve spring (A) in the pump housing.
    Fig 18: Flow Control Valve Spring, Flow Control Valve, O-Ring And Flow Control Valve Cap With Torque Specifications
    G08088020Courtesy of AMERICAN HONDA MOTOR CO., INC.
  39. Coat the flow control valve (B) with power steering fluid, and install it in the pump housing.
  40. Coat the new 16.7 mm O-ring (C) with power steering fluid, and install it on the flow control valve cap (D).
  41. Install the pressure control valve cap on the pump housing, and tighten it to the specified torque.
  42. Coat the new 14.8mm O-ring (A) with power steering fluid, and install it on the inlet joint (B).
    Fig 19: O-Ring And Inlet Joint With Torque Specifications
    G08088021Courtesy of AMERICAN HONDA MOTOR CO., INC.
  43. Install the inlet joint on the pump housing.
  44. 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 20: Vise Jaws, Pulley Nut And Pulley On Pump Housing With Torque Specifications
    G08088022Courtesy of AMERICAN HONDA MOTOR CO., INC.
  45. Hold the pulley with the pulley holder, and tighten the pulley nut to the specified torque.
  46. Check that the power steering pump turns smoothly by turning the pulley by hand. If it turns hard, loosen the four flange bolts on the pump cover, then retighten them in the same manner as in step  33. Retest. If the power steering pump is still hard to turn, replace the power steering pump.
  47. Install the power steering pump (see PUMP REPLACEMENT  ).
scientia non olet · About LEMON Manuals