This boom cylinder seal kit is essential for maintaining hydraulic pressure and preventing fluid leaks within the main boom cylinder of the excavator. Constructed from high-grade NBR rubber and durable metal components, it offers superior resistance to wear and contamination compared to a worn or damaged kit. Operators may observe slow or jerky boom movements, external hydraulic fluid leaks around the cylinder rod, or a loss of lifting power 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 indication of a failing seal kit is often external hydraulic fluid leakage around the cylinder rod or a noticeable decrease in the cylinder's speed and power. If ignored, the leakage will worsen, leading to a significant loss of hydraulic fluid and potentially causing the cylinder to fail to hold its position under load. Continued operation risks damage to the cylinder rod and internal hydraulic system components.
Thoroughly clean the cylinder bore and rod before installation to prevent introducing contaminants that can damage the new seals. Ensure all seals are lubricated with clean hydraulic fluid before insertion to prevent tearing.
When replacing the boom cylinder seal kit, inspect the cylinder rod for scoring or pitting and check the hydraulic fluid for signs of contamination.