This is a main control valve seal kit for Volvo excavators, essential for maintaining proper hydraulic pressure and preventing internal leaks within the valve body. It is constructed from durable materials that withstand high pressures and temperatures, ensuring longevity and performance superior to worn seals that allow fluid bypass. Operators may notice sluggish or erratic hydraulic functions, such as slow bucket curl or boom extension, and potentially a loss of overall hydraulic power when these seals fail.
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.
Symptoms of a failing main valve seal kit include slow or unresponsive operation of hydraulic functions like boom, stick, or bucket. If left unaddressed, these issues will worsen, leading to a significant loss of hydraulic power and potentially causing overheating of the hydraulic system. The risk is reduced machine productivity and increased wear on other hydraulic components.
Carefully inspect the valve spools and bore for any burrs or scoring that could damage the new seals during installation. Ensure the seals are oriented correctly according to the service manual.
When replacing main valve seals, it is advisable to inspect the hydraulic pump and cylinders for any signs of wear or leakage.