Skip to main content

SERIES 40E LUBRICATING OIL PUMP

Use the following procedure to repair or replace the lubricating oil pump. ‪

Removal of Oil Pump

Remove the oil pump as follows: ‪

  1. Remove the vibration damper. refer to section .
  2. Remove front oil seal by mounting the front oil seal removal tool, J 39266, into the crankshaft nose and over the oil seal. Turn, forcing the screw to remove the seal.
  3. Remove the oil pump housing as follows:
    1. Loosen and remove the six capscrews (two short capscrews are located at the two and three o'clock positions).
    2. Remove the oil pump housing with O-ring seal from the front cover. Discard the O-ring seal.
    3. Remove the outer rotor. See Figure 31602 .
    4. 1. Outer Rotor ‪

      Outer Rotor Removal

  4. Using a hammer and chisel, remove the Woodruff key from the crankshaft. See Figure 31603 .

    1. Woodruff Key ‪

    2. Crankshaft ‪

    Woodruff Key Removal

  5. Remove the inner rotor and oil slinger from the oil pump drive spline.
  6. Remove the oil pump housing plate. With the plate removed, remove the sealing O-ring from the front cover. Discard the O-ring. See Figure 31609 .

    1. O-ring ‪

    2. Oil Pump Plate ‪

    Oil Pump Housing Plate Removal

Cleaning of Pump Assembly

Clean the oil pump assembly as follows: ‪

  1. Wash all parts thoroughly in an approved solvent.

    To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 40 psi (276 kPa) air pressure.

  2. Dry with filtered compressed air.
Inspection and Repair

Inspect and repair the oil pump assembly as follows: ‪

  1. Visually inspect rotors, housing and plate for nicks, burrs or scoring.
  2. Replace any damaged components.

    Note: The inner and outer rotors are a matched set and cannot be replaced separately.

  3. Inspect for wear by checking the radial clearance between the outer rotor and the pump housing using a feeler gage. If radial clearance exceeds the specifications, check the housing to rotor clearance. See Figure 31604 .

    1. Feeler Gage ‪

    3. Outer Rotor ‪

    2. Oil Pump Housing ‪

    Radial Clearance Check

  4. Check housing to rotor clearance as follows:
    1. With the O-ring removed from the oil pump housing, place a straightedge across the housing.
    2. Insert an appropriate feeler gage under the straightedge at the housing and outer rotor.
    3. If not within specifications, check the housing and inner rotor for wear. Replace worn components, as required. See Figure 31605 .
    4. 1. Rotors ‪

      3. Straightedge ‪

      2. Feeler Gage ‪

      4. Oil Pump Housing ‪

      Inner Rotor Check

Lubricating Oil Pump Assembly

Follow these steps to assemble the lubricating oil pump. ‪

  1. Install a new oil seal into the lubricating oil pump housing as follows.
    1. Apply gasket eliminator #515 to the O.D. of the oil seal.
    2. Slip the oil seal into the installing tool, J 39266.
    3. Press the seal into the oil pump housing so the front of the seal is flush with the front of the oil pump housing. See Figure 31606 .
    4. 1. Oil Seal ‪

      3. Press ‪

      2. Installation Tool ‪

      4. Oil Pump Housing ‪

      Oil Seal Installation

  2. Install a new O-ring on the front cover. Then, install the housing plate. See Figure 31609 .

    1. O-ring ‪

    2.Oil Pump Plate ‪

    Housing Plate Installation

  3. Install the inner rotor and oil slinger onto the crankshaft gear spline.

    Note: The concave surface of the oil slinger should be facing out.

  4. With the inner rotor installed, tap in the woodruff key with a plastic hammer. See Figure 31610 .

    1. Woodruff Key ‪

    2. Crankshaft ‪

    Woodruff Key Installation

  5. Lubricate the outer rotor with clean engine oil and install the rotor into the oil pump housing. See Figure 31611 .

    1. Mounting Dowels ‪

    3. Outer Rotor ‪

    2. O-ring Groove ‪

    Installation of Outer Rotor

  6. Install a new O-ring into the housing groove and align the housing dowel pins with the mounting locations. Install the oil pump housing to the front cover.
  7. Lubricate the oil seal prior to installation.
  8. Install the six capscrews to secure oil pump housing to the front cover. Two short capscrews are located at the two and three o'clock positions. Torque the capscrews to specifications.
  9. Install the vibration damper. refer to section .