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Cummins/Onan — Removal

For these Cummins/Onan models: GNH, GV12.

Applies to: Cummins Onan Gv12

Procedure

  1. 1. Shut off main gas supply valve.
  2. 2. Remove air intake piping from carburetor.
  3. 3. Remove gas supply line from pressure reduction valve.
  4. 4. Remove throttle linkage from carburetor. Fig.4-7.
  5. 5. Remove clamps securing pressure reduction valve to mounting bracket.
  6. 6. Remove capscrews and washers securing carburetor to in- take manifold; lift off carburetor and pressure reduction valve and discard gasket.
  7. 7. Separate carburetor and pressure reduction valve; remove pipe fittings.

Source: manual:960-0010 Cummins GNH series Nat Gas Engine Service Manual (1-1966).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.