This boom cylinder seal kit is designed to replace worn or damaged seals within the main boom hydraulic cylinder of Volvo excavators, preventing hydraulic fluid leakage and maintaining system pressure. It is constructed from durable materials engineered to withstand high pressures and harsh operating conditions, unlike a worn kit that allows fluid bypass and reduced cylinder performance. Operators may notice a slow-moving or drifting boom, external hydraulic fluid leaks around the cylinder rod, or a loss of lifting capacity when this seal kit fails.
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 first sign of a failing boom cylinder seal kit is often a visible external leak of hydraulic fluid from the cylinder rod seal. This can progress to a noticeable 'drift' or slow lowering of the boom when hydraulic pressure is applied, and a reduced ability to hold heavy loads. Continued operation with leaking seals can lead to internal cylinder damage, contamination of the hydraulic system, and significant downtime.
Carefully inspect the cylinder rod and bore for any scratches or burrs that could damage the new seals during installation. Use a proper seal lubricant and avoid using sharp tools that could nick or cut the seals.
Inspect the hydraulic fluid for contamination and check the condition of the cylinder rod and bore for scoring or wear when replacing the boom cylinder seal kit.