CATEngine Parts

128-4326 Gear Pump — Cat Engine 3116 Excavator M320

This is a CAT Gear Pump, essential for generating hydraulic pressure within the machine's hydraulic system. Manufactured to meet rigorous OEM quality standards, it provides consistent fluid flow and pressure, unlike a worn pump which may exhibit reduced efficiency. Operators might observe sluggish hydraulic functions, a whining noise from the pump area, or a drop in system pressure when this gear pump is failing.

Gear Pump – Part No 128-4326 – 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 and Steel
ApplicationHydraulic System
Service LifeReplace as needed based on performance and inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early indicators of a failing gear pump include a noticeable decrease in the speed or power of hydraulic functions and an audible whining or groaning sound from the pump. If ignored, the pump's output will continue to degrade, leading to intermittent hydraulic system failures and potential overheating. The ultimate consequence is the inability to operate critical machine functions, resulting in significant operational downtime.

Installation Tip

Thoroughly flush the hydraulic system before installing a new gear pump to remove any contaminants that could cause premature failure. Ensure the pump shaft is properly aligned with the drive coupling to prevent vibration and damage.

Service Note

When replacing the gear pump, it is crucial to inspect the hydraulic filter and consider replacing it, along with checking the hydraulic fluid for signs of contamination.