This is a main valve seal kit, containing various seals and O-rings essential for maintaining the integrity and proper function of the excavator's main control valve. Manufactured to meet strict OEM quality standards, these seals prevent internal and external leaks, ensuring precise hydraulic control unlike worn or cracked seals. Operators may experience issues such as slow or erratic hydraulic movements, external fluid leaks around the valve body, or a loss of holding pressure in the cylinders when this kit is needed.
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.
External hydraulic fluid leaks originating from the main control valve body or a noticeable decrease in the responsiveness and precision of hydraulic functions are common signs that a seal kit is needed. If ignored, internal leaks can worsen, leading to loss of hydraulic power and potentially causing overheating due to increased fluid bypass. The risk is compromised machine operation and potential damage to valve components.
Before disassembling the valve, thoroughly clean the exterior to prevent dirt from entering the hydraulic system. When installing new seals, use a lubricant compatible with hydraulic fluid and carefully seat each seal to prevent pinching or tearing.
When replacing the main valve seal kit, it is highly recommended to inspect and clean the hydraulic system's filters and check the hydraulic fluid level and condition.