CATEngine Parts

220-5623 Hydraulic Piston Pump — Cat 420D 430D

This hydraulic piston pump is the heart of the machine's hydraulic system, generating the flow and pressure needed for functions like lifting, steering, and actuating implements. It is built to precise specifications, ensuring efficient operation compared to a worn or leaking pump. Operators may experience slow or erratic hydraulic movements, loss of hydraulic power, or whining noises from the pump when this part begins to fail.

Hydraulic Piston Pump – Part No 220-5623 – 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 TypeHydraulic Piston Pump
MaterialCast Iron and Steel
ApplicationMain Hydraulic System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing hydraulic piston pump include a slight hesitation or sluggishness in hydraulic functions. If ignored, the pump's performance will degrade further, leading to a significant loss of lifting or maneuvering power and potentially overheating of the hydraulic system. Continued operation with a worn pump can cause damage to other hydraulic components.

Installation Tip

Thoroughly flush the hydraulic system and replace the hydraulic filter before installing the new pump to prevent contamination. Ensure the pump shaft is correctly aligned with the drive coupling to avoid premature wear.

Service Note

Replace the hydraulic filter and inspect the hydraulic fluid for contamination when installing a new piston pump.