CATHydraulic Parts

7j-0557 Hydraulic Pump Cartridge — Cat 988

This is a CAT Hydraulic Pump Cartridge, a precision-engineered assembly that forms the core of a hydraulic pump, responsible for generating fluid flow and pressure. It is manufactured to meet rigorous OEM specifications, offering the same reliability and performance as a new original component. Operators might observe a reduction in hydraulic system performance, such as slower boom or bucket movements, or a loss of lifting capacity when this cartridge is worn.

Hydraulic Pump Cartridge – Part No 7j-0557 – 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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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

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 Pump Cartridge
MaterialHardened steel and bronze
ApplicationMain hydraulic pump
Service LifeReplace as needed based on performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing cartridge may first manifest as a gradual loss of hydraulic pressure or flow. If left unaddressed, this can lead to significantly slower cycle times and reduced implement responsiveness. Continued operation can cause overheating of the hydraulic system and potential damage to other components.

Installation Tip

Thoroughly clean the pump housing and ensure all internal surfaces are free of debris before inserting the new cartridge. Improper seating or forcing the cartridge can lead to premature failure.

Service Note

Inspect the hydraulic fluid for contamination and replace the hydraulic filter when changing the pump cartridge.