CATEngine Parts

3p-0891 Gear Pump — Cat 3306

This gear pump is a vital component of the hydraulic system, responsible for generating flow and pressure by meshing gears that move hydraulic fluid. It is constructed to meet Caterpillar's demanding performance standards, ensuring consistent fluid delivery and reliable operation compared to a worn pump that may exhibit reduced output or internal leakage. Operators may notice a loss of hydraulic power, slow or erratic operation of hydraulic functions, or whining noises from the hydraulic system when this pump begins to fail.

Gear Pump – Part No 3p-0891 – 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 TypeGear Pump
MaterialCast iron housing, hardened steel gears
ApplicationHydraulic system
Service LifeReplace based on system diagnostics and performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial signs of a failing gear pump often include a noticeable decrease in the speed and power of hydraulic functions, or intermittent operation. If the pump continues to degrade, it may lead to a complete loss of hydraulic pressure, rendering the machine inoperable for critical tasks. This can result in significant downtime and potential damage to other hydraulic components due to inadequate lubrication and cooling.

Installation Tip

Ensure the hydraulic reservoir is filled with the correct type and amount of fluid, and that all air is purged from the system after installation. Do not operate the pump dry, as this can cause immediate internal damage.

Service Note

Always replace the hydraulic filter(s) and inspect the hydraulic fluid for contamination when installing a new gear pump.