Cummins/Onan GTA14 / GTA14 qi 20 NA — Water Pump - Replacement
Repair & overhaul · Engine water pump
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
- Water pump must have a dowel pin locating hole and oil cooler return passage
Procedure
- Drain coolant and unplug coolant heater if equipped.
- Remove water pump drive belt, fan hub and water pump idler pulley assembly.
- Remove coolant inlet transfer connection and six mounting cap-screws.
- Remove water pump downward to clear dowel pin and disconnect water transfer tube.
- Clean water pump gasket surface.
- Install water transfer tube in water pump; inspect transfer tube o-ring.
- Install water pump to block using six cap-screws in three torque steps.
- Install coolant inlet transfer connection with new gasket.
- Install fan hub, adjust water pump drive belt, fill with coolant and check for leaks.
Specs & values
- Step 1 torque 15 Nm [10 ft-lb]; Step 2 30 Nm [20 ft-lb]; Step 3 47 Nm [35 ft-lb]
- Coolant inlet transfer connection 47 Nm [35 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.