This is a 2nd Boom Cylinder Seal Kit, specifically designed to replace the worn seals within the secondary boom cylinder of Volvo excavators. It is essential for maintaining hydraulic pressure and preventing fluid leakage, ensuring the smooth and controlled extension and retraction of the boom. Symptoms of a failed kit include visible oil leaks around the cylinder rod, a loss of lifting capacity, or slow and jerky boom movements.
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 initial sign of a failing 2nd boom cylinder seal kit is often visible hydraulic fluid leaking from the cylinder rod or around the cylinder base. This will progress to a noticeable decrease in the boom's lifting force, slower extension or retraction, and the inability to hold a position under load. Continued operation risks significant hydraulic system contamination and potential damage to the cylinder bore.
Carefully clean the cylinder bore and rod before installing the new seals to avoid nicking or damaging them. Ensure all seals are seated correctly and oriented as per the service manual to prevent immediate leakage.
Inspect the cylinder rod for any scoring or damage, and check the hydraulic fluid for signs of contamination before installing the new seal kit.