CATHydraulic Parts

1P1991 Gear Pump-Hydraulic — Cat D6C D6D

This is a hydraulic gear pump, responsible for generating the flow and pressure required to operate various hydraulic functions on the machine, such as steering, lifting, or implement control. Manufactured to precise tolerances, it ensures consistent fluid delivery and system efficiency, unlike a worn pump with damaged gears or worn housing. Operators may experience sluggish hydraulic functions, loss of system pressure, or audible whining noises from the pump.

Gear Pump-Hydraulic – Part No 1P1991 – 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 Gear Pump
MaterialCast Iron, Steel
ApplicationMain Hydraulic System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A gradual decrease in the speed and power of hydraulic functions, such as lifting or steering, is often the first sign of a worn hydraulic gear pump. If ignored, the pump may begin to whine or groan, and eventually fail to generate sufficient pressure, leading to a complete loss of hydraulic operation. Operating with a failing pump can cause overheating and damage to other hydraulic components due to inadequate flow.

Installation Tip

Ensure the hydraulic system is completely clean before installing the new pump to prevent immediate contamination. Never run the pump dry; always prime it with hydraulic fluid before initial startup.

Service Note

It is essential to thoroughly flush the hydraulic system and replace the hydraulic filter element when installing a new gear pump.