CATUndercarriage

7Y1866 Cylinder — Cat 1290T 1390

This is a CAT Cylinder, a fundamental component in hydraulic systems responsible for converting fluid pressure into linear motion. It is manufactured to meet rigorous OEM quality standards, providing precise sealing and smooth operation compared to a worn cylinder exhibiting leaks or scoring. Operators may observe slow or jerky hydraulic functions, or a complete loss of hydraulic power as symptoms of a failing cylinder.

Cylinder – Part No 7Y1866 – CAT Spare Part
Part Specifications
BrandCAT
CategoryUndercarriage
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

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

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

Part TypeHydraulic Cylinder
MaterialSteel Alloy
ApplicationHydraulic System
Service LifeReplace based on inspection and performance
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing hydraulic cylinder may initially manifest as sluggish or inconsistent operation of the associated hydraulic function. If left unaddressed, this can lead to external fluid leaks, internal bypassing, and a gradual loss of lifting or actuation force. Continued use risks damage to the hydraulic pump and system components.

Installation Tip

Thoroughly flush the hydraulic system to remove any contaminants before installing the new cylinder. Ensure the cylinder rod is properly aligned with its mounting points to prevent side-loading and seal damage.

Service Note

Inspect hydraulic hoses, fittings, and the hydraulic pump for leaks or wear.