CATHydraulic Parts

4j-7949 Hydraulic Vane Pump Cartridge — Cat 988

This is a hydraulic vane pump cartridge, a critical component within the main hydraulic system responsible for generating fluid flow and pressure. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn or damaged units. Operators may notice a loss of hydraulic power, slow or erratic implement movement, or increased system noise when this cartridge begins to fail.

Hydraulic Vane Pump Cartridge – Part No 4j-7949 – 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 Vane Pump Cartridge
MaterialHardened Steel Alloy
ApplicationMain Hydraulic System
Service LifeReplace based on performance degradation or 3,000 hrs
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing cartridge include a noticeable decrease in hydraulic system pressure and flow. If left unaddressed, the pump's efficiency will continue to decline, leading to sluggish or unresponsive hydraulic functions. Continued operation with a degraded cartridge risks severe damage to other hydraulic components due to insufficient lubrication and pressure.

Installation Tip

Ensure the pump housing and shaft are meticulously clean before installation to prevent scoring. Avoid overtightening the mounting bolts, as this can distort the pump housing and cause premature failure.

Service Note

Always inspect the hydraulic fluid and filter for debris, and consider replacing the hydraulic filter when servicing the pump cartridge.