CATEngine Parts

1g-9788 Hydraulic Pump — Cat 3116 3126

This hydraulic pump is a core component of the machine's hydraulic system, responsible for generating the flow and pressure needed to power various functions like lifting, steering, and actuating implements. It is engineered to meet Caterpillar's robust performance and durability standards, offering consistent output compared to a worn pump with internal scoring or seal leakage. Operators may notice a loss of hydraulic power, slow or jerky implement movement, or overheating of the hydraulic fluid if this pump begins to fail.

Hydraulic Pump – Part No 1g-9788 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine 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

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeHydraulic Pump
MaterialCast iron and steel
ApplicationMachine hydraulic system
Service LifeReplace based on hydraulic system diagnostics and performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early indications of a failing hydraulic pump include a noticeable decrease in the speed and power of hydraulic functions, or jerky movements. If left unaddressed, the pump may overheat the hydraulic fluid, leading to system-wide performance degradation and potential damage to other hydraulic components. Ultimately, a severely worn pump can result in a complete loss of hydraulic power, halting all machine operations.

Installation Tip

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

Service Note

Replace the hydraulic filter element and inspect the hydraulic fluid for signs of wear or contamination when servicing the hydraulic pump.