This is an arm cylinder seal kit, designed to replace the worn seals within the hydraulic cylinder responsible for the excavator's arm (or boom) movement. It is manufactured to meet stringent OEM material specifications, providing a durable seal that prevents hydraulic fluid leakage and maintains consistent cylinder performance, unlike degraded seals that allow fluid bypass. Operators may notice a slow-dropping arm when holding position, external leaks around the cylinder rod, or a general loss of arm lifting power as symptoms of failing seals.
Always verify with serial number before ordering.
Parts Trading Company · Mumbai, Est. 1956 · Same-day dispatch · Ships worldwide · GST invoice included
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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 failing arm cylinder seals is often a slow drift or drop of the arm when the hydraulic control is in the neutral position. If ignored, the leakage will worsen, leading to reduced lifting capacity and potential external hydraulic fluid leaks around the cylinder rod. Continued operation with leaking seals can lead to increased hydraulic system temperature and potential damage to the cylinder rod surface.
Thoroughly clean the cylinder bore and rod to remove all debris and old seal material before attempting installation. Avoid using sharp tools that could scratch the cylinder rod or bore, as this will damage the new seals.
Inspect the hydraulic cylinder rod for scoring or pitting, and check the condition of the hydraulic fluid for signs of contamination.