CATHydraulic Parts

9S6788 — Caterpillar Pump Gr-Gear- Transmiossion 9S6788

This gear pump assembly is a vital part of the transmission system, responsible for generating the hydraulic pressure needed to engage and control gear changes. It is manufactured to precise tolerances, ensuring efficient fluid delivery and reliable operation, unlike worn pumps that can cause slippage and performance issues. Operators may notice delayed gear shifts, a lack of power during acceleration, or transmission overheating when this gear pump is failing.

Caterpillar Pump Gr-Gear- Transmiossion 9S6788 – Part No 9S6788 – 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 Assembly
MaterialHardened Steel Alloy
ApplicationTransmission Hydraulic System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first indication of a failing gear pump might be a subtle hesitation or whine during gear changes. As the condition worsens, expect more pronounced shifting delays, a noticeable loss of pulling power, and potentially increased transmission operating temperatures. Ignoring these symptoms can lead to severe internal transmission damage and costly repairs.

Installation Tip

Ensure the transmission fluid is clean and at the correct level before installing the new gear pump. Avoid rotating the pump shaft by hand with excessive force, as this can damage the gears.

Service Note

When replacing the transmission gear pump, it is highly recommended to inspect and replace the transmission filter and check the condition of the transmission oil cooler.