CATHydraulic Parts

7J9921 Cylinder As-Rh — Cat 950

This Cylinder As-Rh is a crucial actuator within the hydraulic system, converting fluid pressure into mechanical force to perform work, such as lifting or steering. Manufactured to precise tolerances, it ensures smooth and powerful operation, unlike worn cylinders that may exhibit leaks, binding, or reduced force. Operators might notice a loss of lifting capacity, slow or uneven movement, or hydraulic fluid leakage around the cylinder when this assembly is failing.

Cylinder As-Rh – Part No 7J9921 – 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 TypeCylinder Assembly
MaterialSteel
ApplicationHydraulic system actuator
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial symptoms of a failing Cylinder As-Rh include a gradual decrease in lifting force or slower actuation speed. If left unaddressed, this can lead to noticeable leaks from the cylinder seals, binding during operation, or complete loss of function for the affected system. Continued use risks damage to the cylinder rod, barrel, and seals, potentially leading to hydraulic system contamination.

Installation Tip

Ensure the cylinder mounting points are clean and free of damage before installation to ensure proper alignment and prevent stress on the new component. Bleed the hydraulic system thoroughly after installation to remove any trapped air.

Service Note

Inspect hydraulic fluid, hoses, and fittings for leaks or contamination, and check the cylinder mounting pins and bushings for wear when replacing the Cylinder As-Rh.