CATHydraulic Parts

6E6659 Pump Gp-Vane — Cat 950F II

This vane pump group is essential for generating hydraulic pressure in the machine's primary hydraulic circuit, powering functions like steering, braking, and implement operation. It is built to exacting standards, ensuring consistent fluid delivery and pressure regulation, unlike worn pumps that exhibit reduced flow and increased internal leakage. Operators might notice a loss of hydraulic power, slow or jerky implement movements, or a whining noise from the pump area when this unit begins to fail.

Pump Gp-Vane – Part No 6E6659 – 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 TypeVane Pump Group
MaterialCast Iron, Steel, Bronze
ApplicationPrimary Hydraulic Circuit
Service LifeReplace as needed based on performance testing
CompatibilityCAT 950F II
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early indications of a failing vane pump include a gradual loss of hydraulic system pressure or a noticeable increase in hydraulic fluid temperature. If ignored, the pump's performance will degrade further, leading to sluggish or erratic operation of all hydraulic functions. The ultimate consequence is a complete loss of hydraulic power, immobilizing the equipment.

Installation Tip

Prime the new pump with clean hydraulic fluid before installation to ensure immediate lubrication and prevent dry start-up damage. Never run the pump dry, even for a moment.

Service Note

Inspect hydraulic system filters and fluid for debris when replacing the vane pump group.