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Cummins/Onan 4.5 CKM — Service Procedure

For the Cummins/Onan 4.5 CKM.

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Before you start

  • Some models with center-tapped windings use B1 and B3.
  • posi- tion of stator leads before removing stator.
  • Do not attempt to remove rotor by blocking engine

Procedure

  1. Remove aircleaner assembly by removing two screws
  2. Remove four screws to release end bracket panel, see
  3. Lift the brushes by the leads and lock in this position
  4. Cut cable tie(s) securing plastic conduit to over-bolt.
  5. Remove ground strap at vibro-mount, see Figure 8-6.
  6. Slide engine wiring harness (plastic conduit) from
  7. Place hoist hook into end bracket air vents and raise
  8. Disassemble vibro-mount rubber caps and springs to
  9. Use a plastic hammer to remove end bracket from
  10. Use a pry bar or large screwdriver to loosen stator
  11. Loosen thru-boit 2-3 turns leaving a 1/8 inch (3 mm)
  12. Remove thru-bolt and slide rotor from tapered shaft.

Tools required

  • hoist hook into end bracket air vents and raise
  • wrench
  • Hoisting Generator End

Source: manual:TP5206 Kohler Gen Service 4.5CKM (06-1990).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.