Hydraulic Motor-Pump Assembly – CR154755-001

Crown builds this hydraulic motor-pump assembly as a combined unit for its electric lift trucks, pairing the drive motor directly with the hydraulic pump it powers rather than supplying the two as separate serviceable parts. The motor spins the pump's internal gears or vanes, drawing hydraulic fluid from the reservoir and pressurizing it on demand to run the lift, tilt, and any auxiliary hydraulic functions on the truck.

Because the motor and pump share a single housing and shaft coupling, replacing the assembly as a unit avoids the alignment and coupling issues that come with pairing a new motor to a worn pump or vice versa. At 18 pounds, it is sized for the lighter hydraulic demand of a walkie or narrow-aisle class truck rather than a full-size counterbalance lift truck.

Wear in a motor-pump assembly typically shows up as slow or weak lift response, increased noise under load, or the pump losing its ability to build full pressure as internal clearances open up with age. Replacing the assembly restores full hydraulic response for lift and tilt functions on Crown equipment specifying this unit.