This is a hydraulic pilot gear pump, serving as the primary source of hydraulic power for the main hydraulic system in Volvo excavators. It converts mechanical energy from the engine into hydraulic energy, enabling the operation of crucial functions like boom, stick, and bucket movements. A failing pilot gear pump will result in a noticeable loss of hydraulic power, slow or unresponsive implement controls, and potentially audible whining noises from the pump.
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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 gradual decrease in the speed and power of hydraulic functions, such as boom, stick, and bucket movements, is the first indication of a failing pilot gear pump. If ignored, the excavator will become increasingly sluggish, making it difficult to perform tasks efficiently and safely. The risk of being unable to complete essential work operations rises significantly.
Prime the new pump with clean hydraulic fluid before installation to ensure immediate lubrication upon startup. Avoid running the pump dry, as this can quickly damage the new components.
Inspect the hydraulic system for contamination and consider replacing the main hydraulic filter when installing a new pilot gear pump.