This is an arm cylinder seal kit designed to replace worn seals within the hydraulic arm cylinder of Volvo excavators. It prevents hydraulic fluid leakage, maintains system pressure, and ensures smooth, controlled operation of the boom and arm. Failure of these seals typically results in a slow-moving or drifting arm, external fluid leaks, and a loss of lifting capacity.
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.
The most common symptom of a failing arm cylinder seal is a noticeable drift or slow movement of the excavator's arm when not actively being operated. If left unaddressed, external hydraulic fluid leaks will become apparent, and the cylinder may lose its ability to hold position or lift heavy loads effectively. This can compromise operational safety and efficiency.
Carefully inspect the cylinder bore and piston rod for any scoring or damage before installing the new seals, as imperfections can quickly damage new seals. Ensure all old seal material is completely removed from the grooves to guarantee a proper seal.
Inspect the hydraulic fluid level and condition, and check the other hydraulic cylinder seals for signs of wear or leakage.