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 manufactured with high-quality, wear-resistant materials that meet OEM specifications for durability and sealing performance, unlike worn seals that allow hydraulic fluid to bypass. Operators may notice hydraulic fluid leaking externally from the cylinder rod, or a loss of lifting power and slow boom movement, indicating a need for a seal kit.
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 boom cylinder rod, or a noticeable decrease in the cylinder's lifting force and speed, are the primary signs of worn seals. If not replaced, the leakage will worsen, potentially leading to insufficient hydraulic pressure for boom operation and increased contamination of the hydraulic system. This can compromise the excavator's ability to perform its intended tasks safely and efficiently.
Thoroughly clean the inside of the cylinder barrel and all components before installing the new seals to prevent damage from debris. Ensure the seals are lubricated with clean hydraulic fluid and are not twisted or nicked during installation.
Inspect the cylinder rod for scoring or damage, and check the condition of the hydraulic fluid and filter for signs of contamination.