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Home›Repair guides›The suggested disassembly procedure is as follows :

Cummins/Onan 4.0 BF — The suggested disassembly procedure is as follows :

For the Cummins/Onan 4.0 BF.

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Procedure

  1. 4. Remove all shrouds, mounts, air cleaner, control
  2. 6. Remove flywheel alternator stator .
  3. 7. Remove the gear cover, being careful to protect
  4. 8. Remove the crank gear, using a gear puller and
  5. 9. Remove fuel pump, oil filter, starter, carburetor,
  6. 10. Remove breaker box .

Source: manual:965-0515 Onan 4KW BF Power Drawer Major Service Manual (09-1973).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.