CATEngine Parts

121-4311-121-4312 Hydraulic Piston Pump 121 4311 — Cat 3412E 24H

This is a high-pressure hydraulic piston pump designed to deliver precise fluid flow for the main hydraulic system of heavy machinery. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or failing units. Operators may notice a loss of hydraulic power, sluggish implement movement, or unusual pump noise when this component begins to fail.

Hydraulic Piston Pump 121 4311 – Part No 121-4311-121-4312 – 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
MaterialHardened Steel Alloy
ApplicationMain Hydraulic System
Service LifeReplace based on performance degradation or 5,000-8,000 hours
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of failure may include a noticeable decrease in hydraulic system pressure or responsiveness. If ignored, the pump's performance will continue to degrade, leading to slower operation of hydraulic functions. Continued operation with a failing pump risks overheating the hydraulic system and damaging other critical components.

Installation Tip

Ensure the hydraulic system is thoroughly flushed to remove any debris before installing the new pump. Avoid overtightening the mounting bolts, as this can distort the pump housing and lead to premature failure.

Service Note

Inspect hydraulic fluid, filters, and hoses for contamination or wear when replacing this pump.