Onan 132-0306 Water Pump End Cover
The Onan 132-0306 Water Pump End Cover is the removable face of the pump wet end. Behind it sit the impeller, the wearplate and the cover gasket, and the cover has to pull that stack up evenly and hold it there against pump pressure and vibration for the whole service interval.
A distorted or pitted cover is easy to overlook because the gasket seems to take up the difference on assembly. It does not last. Within a season the joint starts weeping salt, and once salt is creeping under the gasket the corrosion accelerates. Replacing the cover is the permanent fix. This part is listed for Onan water pump 132-0284 on MAJB 2.5 and 3.0 kW generator sets.
Key Features
- Machined sealing face for a flat, even gasket joint
- Fastener pattern matched to the Onan pump housing
- Retains the impeller and wearplate at their designed clearance
- Removable for impeller service without disturbing the drive end
- Direct replacement for a corroded, scored or distorted original
Applications
- Raw water pump overhaul on Onan marine generator sets
- Replacing a cover pitted by salt water attack
- Repairing a cover joint that weeps or draws air
- Rebuilding a pump alongside the impeller, wearplate and gasket
Specifications
- Brand: Onan
- Manufacturer Part Number: 132-0306
- Part Type: End Cover
- Fits: Onan water pump 132-0284 on MAJB 2.5 and 3.0 kW generator sets
- Quantity Per Pump: 1
- Condition: New
- Shipping Weight: 1 lb
Frequently Asked Questions
Q: Should I replace the screws at the same time?
Replace any that are corroded or have damaged heads. They are cheap and a snapped screw turns a short job into a long one.
Q: How do I check the cover for distortion?
Lay the sealing face on a flat surface and try to rock it, then check for light under the edges. Any movement means it will not seal reliably.
Q: Why do cover screws keep loosening?
Usually because the gasket has taken a set or the cover face is dished, so the joint keeps relaxing. Replace both and retorque evenly.
Q: Can I run without a gasket if the faces are clean?
No. The gasket sets the clearance behind the cover as well as sealing the joint.
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 end cover.
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