CATBearing & Bushing

1U3988 Boom Cylinder Group — Cat 235

This is a Caterpillar Boom Cylinder Group, designed to provide the hydraulic force necessary for the articulation of the equipment's boom. It is manufactured to meet stringent OEM quality standards, ensuring superior durability and performance compared to worn components that may exhibit leaks or reduced operational range. Operators may notice slow or jerky boom movement, or an inability to fully extend or retract the boom when this component begins to fail.

Boom Cylinder Group – Part No 1U3988 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBearing & Bushing
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

Never strike bearings directly — use a bearing press or driver set. Heat housing (not bearing) to ease installation. Replace bearings in sets where applicable. Check housing bore diameter before fitting — out-of-round bores destroy new bearings.

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 Assembly
MaterialHardened Steel, High-Tensile Seals
ApplicationBoom Articulation System
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of failure often include a slight hesitation or sluggishness in boom movement. If ignored, the cylinder may develop visible hydraulic fluid leaks around the rod seal or at the cylinder body. Continued operation with a failing cylinder can lead to unpredictable boom control and potential damage to adjacent hydraulic components.

Installation Tip

Ensure the hydraulic system is properly depressurized before disconnecting lines to prevent injury and fluid loss. Avoid overtightening the mounting bolts, as this can distort the cylinder body and cause premature seal failure.

Service Note

Inspect hydraulic hoses, fittings, and the main hydraulic pump for signs of wear or leaks when replacing the boom cylinder group.