Kohler — Purging with Propane Vapor
Maintenance · Gaseous fuel tank assembly
From a Kohler operator's manual covering: 125REZGT, 30--125REZGT, 30REZG, 30REZGT, 50REZG, 70REZGT. Check it applies to your exact model before use.
Applies to: Kohler 125REZGT, Kohler 30REZG, Kohler 30REZGT, Kohler 50REZG, Kohler 70REZGT
Before you start
- Do not purge with liquid propane.
- There may still be liquid or gas propane in the supply line; use care when opening fittings.
- Wear personal protective equipment; liquid propane can cause frostbite on contact.
Procedure
- Source a fitting connecting the main fuel supply line to the exhaust venting system.
- Open the exhaust venting system manual shutoff valve.
- Remove the main fuel supply line at the vaporizer.
- Attach the gaseous fuel tank line to the exhaust vent piping.
- Open the manual override shutoff valve at each gaseous fuel tank.
- Purge excess pressure by switching the controller to ECM ON mode for at least 10 seconds, then back to ECM OFF.
- Connect the generator set gaseous fuel tanks to the LPG supply tank at the 1 3/4 in. ACME fitting(s).
- Open the manual supply valve until 15 psi tank pressure is indicated; then close it.
- Purge the gaseous fuel tanks by switching to ECM ON mode for at least 10 seconds, then back to ECM OFF.
- Repeat steps for a minimum of four cycles to sufficiently purge all air and/or contaminants.
- Close the exhaust venting system manual shutoff valve.
- Disconnect the main fuel supply line from the venting system and reattach to the vaporizer.
- Open the manual supply valve until the gas fuel tank contains 5% of capacity; close the valve.
- Activate ECM ON mode for at least 10 seconds; return to ECM OFF.
- Check all fittings and connections for leaks using an approved leak detector solution.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 15 psi tank pressure
- Minimum four purge cycles
- Fill to 5% of tank capacity
Full service-parts list: Kohler 125REZGT →, Kohler 30REZG →, Kohler 30REZGT →, Kohler 50REZG →, Kohler 70REZGT →
Source: Kohler 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.