This arm cylinder seal kit provides all the necessary seals and O-rings to rebuild the hydraulic cylinder responsible for the excavator's boom or arm movement. Manufactured to precise dimensions and material specifications, it ensures a leak-free seal and smooth operation, unlike worn seals that allow fluid bypass and reduced cylinder performance. Operators may notice slow or jerky arm movements, external hydraulic fluid leaks around the cylinder rod, or a loss of lifting power when this seal kit is needed.
Always verify with serial number before ordering.
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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.
External hydraulic fluid leaks from the cylinder rod or slow, hesitant arm movement are the first indicators of worn seals. If ignored, the leaks will worsen, leading to a significant loss of hydraulic pressure and potentially causing the arm to drift or fail to hold its position. This compromises the excavator's operational capability and safety.
Carefully inspect the cylinder rod for any nicks or scoring before installing new seals, as imperfections can quickly damage the new seals. Use a specialized seal lubricant, not just hydraulic oil, to ease installation and protect the seals.
Inspect the hydraulic fluid and filter for wear particles, which can indicate internal cylinder damage or seal degradation.