CATEngine Parts

370-1871 Boom Cylinder Seal Kit — Cat C18 C15

This is a seal kit designed to replace worn seals within the boom cylinder of CAT equipment, ensuring proper hydraulic pressure retention and smooth operation. It is manufactured to meet stringent OEM standards, providing superior sealing performance compared to degraded or damaged original seals. Operators may notice hydraulic fluid leaks around the boom cylinder, sluggish boom movement, or a loss of lifting power when these seals begin to fail.

Boom Cylinder Seal Kit – Part No 370-1871 – 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 Cylinder Seal Kit
MaterialNBR rubber, PTFE, steel
ApplicationBoom cylinder hydraulic system
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Visible hydraulic fluid leaks around the boom cylinder are the first indication of seal failure. If ignored, the leaks will worsen, leading to a gradual loss of hydraulic pressure and slower, less responsive boom movements. Eventually, the cylinder may not be able to hold its position or lift loads effectively, impacting operational capability.

Installation Tip

Ensure the cylinder rod is perfectly clean and free of any burrs or imperfections before attempting to install the new seals. Avoid using sharp tools that could scratch or nick the new seals during the installation process.

Service Note

Inspect the cylinder rod and bore for any signs of wear or damage that could compromise the new seals' performance.