This is a CAT Boom Cylinder Seal Kit, a comprehensive set of seals and O-rings designed to restore the sealing integrity of the hydraulic boom cylinder. It is manufactured using high-quality materials to withstand high pressures and temperatures, ensuring leak-free operation, unlike a worn or damaged seal that leads to hydraulic fluid loss. Operators will typically observe a slow or jerky boom movement, or external hydraulic fluid leaks around the cylinder rod if the seal kit has failed.
Always verify with serial number before ordering.
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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.
The first sign of a failing boom cylinder seal kit is often a visible hydraulic fluid leak from the cylinder rod or casing. This can progress to sluggish or erratic boom operation, and a loss of lifting capacity. Continued operation with leaking seals can lead to system contamination and potential damage to the hydraulic pump and other components.
Thoroughly clean the cylinder bore and rod before installing new seals to prevent damage from debris. Ensure all seals are oriented correctly according to the manufacturer's specifications to guarantee proper function.
When replacing the boom cylinder seals, inspect the cylinder rod for scoring or damage and check the hydraulic fluid for contamination.