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Home›Repair guides›Valve Lifter Clearance Adjustment

Cummins/Onan 1B Series — Valve Lifter Clearance Adjustment

For the Cummins/Onan 1B Series.

Applies to: Cummins/Onan 1B Series

Procedure

  1. Revolve crankshaft to top position.
  2. Loosen lock screw.
  3. Adjust with feeler gauges.
  4. Tighten lock screw.

Tools required

  • Feeler gauges

Specs & torque values

  • 0.008-0.010 inch intake
  • 0.010-0.012 inch exhaust

Source: manual:901-0025 Onan 1B-series Genset Instruction manual.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.