CATEngine Parts

135-4928 Water Pump Shaft — Cat 3306 3406

This is a CAT Water Pump Shaft, a crucial element that drives the water pump impeller to circulate coolant through the engine. Manufactured to meet precise OEM tolerances, it ensures consistent rotation and efficient cooling compared to a worn or bent shaft. Operators may notice engine overheating, coolant leaks from the pump seal area, or a noisy water pump if this shaft is damaged.

Water Pump Shaft – Part No 135-4928 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeWater Pump Shaft
MaterialHardened Steel
ApplicationEngine Cooling System (Water Pump)
Service LifeReplace as part of water pump assembly or if damaged
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first symptom of a failing water pump shaft is often a coolant leak from the water pump's weep hole or seal area. You might also hear a grinding or whining noise from the water pump as the shaft bearings wear or the shaft itself becomes damaged. If the shaft breaks or seizes, it will lead to immediate engine overheating due to the loss of coolant circulation.

Installation Tip

Ensure the new shaft is properly seated in the pump housing and that the impeller is correctly aligned before tightening. Avoid hammering the shaft directly, as this can damage the shaft or the pump housing.

Service Note

Replace the water pump seal and inspect the water pump bearing when replacing the shaft.