This main pump seal kit is essential for maintaining the integrity of the excavator's primary hydraulic pump, preventing internal and external fluid leaks. Manufactured to meet precise Volvo specifications, these seals offer superior resistance to wear and pressure compared to degraded seals that allow fluid bypass or external seepage. Operators may observe a drop in hydraulic system pressure, sluggish operation, or visible fluid leaks around the main pump 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.
A failing main pump seal kit will typically first present as a gradual loss of hydraulic system efficiency and potentially minor external fluid leaks. If left unaddressed, the leaks can worsen, leading to significant hydraulic fluid loss and reduced system pressure. The worst consequence is internal pump damage due to fluid starvation or contamination, requiring a complete pump replacement.
Ensure all sealing surfaces on the pump housing and rotating components are meticulously clean and free of nicks or scratches before installing the new seals. Never use sharp tools to pry or force seals into place, as this can damage them.
When replacing the main pump seal kit, it is advisable to inspect the hydraulic fluid for contamination and replace the hydraulic filters.