Onan 131-0166 Water Pump Shaft and Bearing Assembly
Supplied as a matched rotating assembly, the Onan 131-0166 Water Pump Shaft and Bearing Assembly replaces the shaft and its bearings in one part number. Everything is pressed and located at the factory, so the rebuild becomes a straightforward strip and refit rather than a bearing press job.
Bearings and shafts on raw water pumps fail as a pair. A leaking shaft seal lets salt water into the grease, the bearings corrode and go rough, and by the time they are audible the shaft has usually been pitted too. Fitting the complete assembly avoids diagnosing which one was worse. This part is listed for Onan water pump 131-0165 on MCCK 4.0 and 6.5 kW and MDJE 7.5 kW generator sets. It interchanges with shaft and bearing assembly 131-0269.
Key Features
- Shaft and bearings supplied as a matched, preassembled unit
- Bearing spacing and preload set at assembly, no press work needed
- Ground seal track ready for a new shaft seal
- Direct replacement for the original Onan rotating group
- Turns a bearing rebuild into a strip and refit job
Applications
- Raw water pump overhaul on Onan marine generator sets
- Replacing noisy, rough or salt damaged pump bearings
- Repair after a shaft seal has leaked into the bearing housing
- Restoring a pump with play or drag at the impeller hub
Specifications
- Brand: Onan
- Manufacturer Part Number: 131-0166
- Part Type: Shaft and Bearing Assembly
- Fits: Onan water pump 131-0165 on MCCK 4.0 and 6.5 kW and MDJE 7.5 kW generator sets
- Quantity Per Pump: 1
- Condition: New
- Shipping Weight: 5 lb
Frequently Asked Questions
Q: How do I know the bearings have failed?
Turn the pump by hand off the belt. Roughness, notchiness or a rumble, or any felt play at the impeller hub, means replace the group.
Q: Can I just replace the bearings on my old shaft?
Only if the shaft is unmarked at the seal track. In practice the shaft is usually pitted by the time the bearings go.
Q: Is the drive end the same on all versions of this pump?
Not necessarily. Flat and keyed shaft builds exist, so compare the drive end with your old part before ordering.
Q: Should the bearings be greased before fitting?
They are supplied ready to run. Do not wash them out or repack them unless your Onan service literature says to.
Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct shaft and bearing assembly.
CLRMarine
