Cummins/Onan — Carbon Canister Connection
Installation · carbon canister (EVAP)
From a Cummins/Onan service manual covering: 5.5 HGJAA, 5.5 HGJAB, 6.5 HGJAA, 6.5 HGJAB, 7.0 HGJAA, 7.0 HGJAB. Check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB
Before you start
- Do not vent the canister (5/8 inch line) into the vehicle or other confined space.
- Blockage of the canister vent or vent hose could lead to collapse of system components due to vacuum.
Procedure
- Mount the canister in one of three orientations (vertical, horizontal, upright) in accordance with its instructions.
- Use 5/16 inch hose for vapor lines.
- Connect the 5/16 inch hose from the fuel tank vent to the 5/16 inch hose barb (identified by the fuel tank icon).
- Connect the adjacent hose barb to the hose from the generator set.
- Connect the 5/8 inch hose barb to a hose terminated outside the living space, or secure vent filter 0148-1343 to the hose barb.
Tools required
- Oetiker ear-type clamps Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →
Source: Cummins/Onan service 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.