This is a boom cylinder seal kit, containing all necessary seals and O-rings to rebuild a Volvo excavator's boom hydraulic cylinder. It is crucial for maintaining hydraulic pressure within the cylinder, preventing leaks, and ensuring smooth, controlled boom movements, differing from worn seals by its ability to hold pressure and prevent fluid loss. Operators may notice hydraulic fluid leaking from the cylinder rod, slow or jerky boom operation, or the boom drifting down when the cylinder seals fail.
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.
Visible hydraulic fluid leakage around the boom cylinder rod is the most common initial symptom. This can progress to slow or erratic boom movements, and the boom may drift downwards when not actively being controlled. If left unaddressed, significant fluid loss can lead to system pressure loss and potential damage to the cylinder bore or piston.
Carefully clean the cylinder bore and rod before installing the new seals to prevent damage and ensure a proper seal. Ensure all seals are oriented correctly according to the manufacturer's instructions.
Inspect the cylinder rod for scoring or damage, and check the hydraulic fluid level and condition.