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Home›Repair guides›PREPARATION FOR PUMP

Cummins/Onan 20W-20 — PREPARATION FOR PUMP

For the Cummins/Onan 20W-20.

Applies to: Cummins Onan 20W 20

Procedure

  1. See that PC mark on flywheel aligns with timing pointer on gear case cover, Figure 26.
  2. Align PC mark on flywheel to timing pointer by rotating crankshaft clockwise in the direction of engine rotation to take out all gear backlash in that direction. Another method of aligning the drive gear slot for pump installation uses a straight edge as shown. An experienced person can "eye ball" the slot in the screw hole and place the pump on the engine with proper gear teeth meshing.

Source: manual:974-0251 Onan RDJF Engine Service and Parts Manual (3-1980).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.