Product Description
HYDRAULIC PUMP
Frequently Asked Questions
Q: What is the CR 089706 and what does it power in Crown lift trucks?
A: The CR 089706 is a hydraulic pump for Crown electric lift trucks. It converts mechanical energy from the electric motor into pressurized hydraulic fluid that operates the mast cylinders, load-holding valves, and tilt mechanisms.
Q: What is the displacement and maximum operating pressure of the CR 089706?
A: Pump displacement and pressure rating vary by truck model year and mast design. Refer to your equipment specification plate or hydraulic system diagram for exact displacement in cubic inches per revolution and pressure in PSI. Using incorrect pressure settings damages the pump.
Q: Which Crown and compatible lift truck models use the CR 089706 pump?
A: The CR 089706 is compatible with specific Crown electric pallet jacks and walkie stackers. Cross-reference the pump part number on your existing unit and verify motor input shaft diameter and connection type match before ordering.
Q: How often should a hydraulic pump be serviced?
A: Replace the hydraulic filter every 500 operating hours and flush the entire system every 1000 to 2000 hours depending on operating environment. Contaminated hydraulic fluid causes internal pump wear, cavitation, and premature failure.
Q: What symptoms indicate pump wear or failure?
A: Failing pumps produce slow or sluggish lift speed, loss of holding pressure, high-pitched whining noise, hot hydraulic fluid, metallic particles in the fluid, or complete loss of hydraulic flow. These indicate internal vane wear, cavitation, or bearing failure.
Q: How long does a hydraulic pump last?
A: A well-maintained pump lasts 8 to 12 years or 2000 to 3000 operating hours. Lifespan decreases significantly with dirty hydraulic fluid, low fluid level, high ambient temperature, or operation beyond rated capacity.