Cummins/Onan GTA14 / GTA14 qi 20 NA — Turbocharger Replacement
Repair & overhaul
For the Cummins/Onan GTA14 / GTA14 qi 20 NA, from the Cummins/Onan owner's manual.
Applies to: Cummins/Onan GTA14 qi 20 NA, Cummins/Onan GTA14 engine
Before you start
- New turbochargers must be pre-lubricated before start-up to prevent bearing damage
Procedure
- Remove oil supply and oil drain connections from turbocharger.
- Remove exhaust pipe and CAC piping from turbocharger.
- Remove the four mounting nuts and remove turbocharger and gasket.
- Install new gasket and apply anti-seize to mounting studs.
- Install turbocharger and new gasket.
- Install drain tube and gasket.
- Pre-lubricate new turbocharger by pouring 50 to 60 cc of clean engine oil into supply fitting.
- Install oil supply line and install charge air core and exhaust piping.
- Operate engine and check for leaks.
Specs & values
- Turbocharger mounting nuts 68 Nm [50 ft-lb]
- Drain tube 44 Nm [82 ft-lb]
- Oil supply line 30 Nm [22 ft-lb]
Full service-parts list: Cummins/Onan GTA14 qi 20 NA →
Source: Cummins/Onan owner'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.