CATHydraulic Parts

8J4515 Caterpillar Pump G-Gear 8J4515 — Cat

This is a gear pump, a vital component in the hydraulic system responsible for generating hydraulic flow by meshing gears. It is manufactured to meet stringent OEM quality standards, providing consistent fluid delivery and pressure compared to a worn or damaged pump. Operators may experience a loss of hydraulic power, slow or unresponsive implement functions, or whining noises from the hydraulic system when this gear pump begins to fail.

Caterpillar Pump G-Gear 8J4515 – Part No 8J4515 – 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 TypeGear Pump
MaterialCast Iron and Steel
ApplicationHydraulic System Fluid Transfer
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing gear pump is often a noticeable reduction in hydraulic system performance, such as slower operation of implements or loss of lifting capacity. If ignored, the pump may begin to cavitate or lose prime, leading to intermittent or complete loss of hydraulic power and potential overheating. Continued operation can cause severe damage to other hydraulic components due to inadequate lubrication and flow.

Installation Tip

Ensure the hydraulic system is thoroughly flushed and all lines are clean before installing the new gear pump to prevent contamination. Never run the pump dry; prime it with hydraulic fluid before initial startup.

Service Note

Inspect the hydraulic fluid for debris and check the hydraulic filter for signs of wear or blockage when replacing the gear pump.