This main valve seal kit is designed to replace worn or leaking seals within the primary hydraulic control valve manifold of Volvo excavators. It is manufactured using high-grade elastomers and metals that meet or exceed original equipment specifications, providing superior resistance to pressure and temperature compared to degraded original seals. Operators may observe external hydraulic fluid leaks from the valve body, a spongy or unresponsive main hydraulic function, or a drop in system pressure when this seal kit is needed.
Always verify with serial number before ordering.
Parts Trading Company · Mumbai, Est. 1956 · Same-day dispatch · Ships worldwide · GST invoice included
From the same category — may also be needed
Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India
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 failing main valve seals is often external hydraulic fluid leakage from the valve body. If left unaddressed, this can lead to a gradual loss of hydraulic system pressure, resulting in sluggish or weak operation of boom, stick, and bucket functions. Continued operation with leaking seals risks environmental contamination and potential damage to the hydraulic pump due to cavitation.
Thoroughly clean the valve body and spool bore before installing new seals to prevent contamination. Ensure all seals are correctly oriented and seated properly to avoid immediate leakage upon system pressurization.
Inspect the hydraulic control valve spool for scoring or wear, and check the hydraulic fluid for contamination before reassembly.