CATHydraulic Parts

4S8660 Pump Gr — Cat 941 951B

This is a Caterpillar Hydraulic Pump Group, a core component responsible for generating the hydraulic flow and pressure needed to operate various machine functions. Built to meet demanding OEM quality benchmarks, it ensures consistent fluid delivery, unlike a worn pump that may produce insufficient flow or pressure. Operators may notice slow or erratic operation of hydraulic systems, or a complete loss of hydraulic power.

Pump Gr – Part No 4S8660 – CAT Spare Part
Part Specifications
BrandCAT
CategoryHydraulic 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

Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.

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

Part TypeHydraulic Pump Group
MaterialCast Iron and Steel
ApplicationMain Hydraulic System
Service LifeReplace as needed based on wear
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The initial symptom of a failing hydraulic pump is often a reduction in the speed or power of hydraulic functions. This can progress to intermittent operation or complete loss of hydraulic pressure, rendering the equipment inoperable. Continued operation with a faulty pump risks overheating the hydraulic system and damaging other components.

Installation Tip

Before installing the new pump, ensure the hydraulic system is completely flushed to remove any debris that could damage the new pump's internal components. Never run the pump dry; prime it with hydraulic fluid before initial startup.

Service Note

When replacing the hydraulic pump, it is crucial to replace the hydraulic filter and inspect the hydraulic fluid for signs of wear metals or contamination.