Cummins/Onan 305CCK / 5CCK — Gas Regulator Installation and Adjustment
Installation
For the Cummins/Onan 305CCK / 5CCK, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 5CCK
Before you start
- If line pressure is more than 8 ounces, consult fuel supplier regarding primary regulator.
- Install a manual shut-off valve; local regulations may require electric solenoid valve and filter.
Procedure
- Install regulator upright on gas supply line and support line securely.
- Turn on gas supply valve; blow into open vent hole F.
- Put soap bubble over outlet nipple E and turn adjusting screw G out until fuel seeps slowly.
- Turn adjusting screw in just until soap bubble holds; set screw flush if projecting.
- Install vent fitting in hole F.
- Connect fuel hose between regulator and carburetor beside rear adapter casting.
- Lubricate tight hose with wet soap; tighten hose clamps securely.
- Turn float lock D in to its limit and lock choke wide open.
Specs & values
- Regulator line pressure 3 to 8 ounces.
Full service-parts list: Cummins/Onan 5CCK →
Source: Cummins/Onan operator's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.