Bosch Rexroth AT378791 Hydraulic Axial Piston Pump

The AT378791 is a Bosch Rexroth A10V series variable displacement axial piston pump designed for hydrostatic transmission in John Deere crawler dozers and loaders. It converts mechanical input torque into hydraulic flow for track drive systems. The pump features a 100 cc/rev maximum displacement rating and is engineered for continuous high-pressure operation in heavy construction equipment. Manufactured by Bosch Rexroth under OEM supply agreement, this unit carries Rexroth part numbers R986110411 and R986110403. It serves as direct replacement for John Deere OEM part numbers AT378791 and superseded AT311182. The pump mounts to the engine flywheel housing and couples to the engine crankshaft or PTO drive. Compatible with John Deere PowerTech 6068, 6081, and 6090 series diesel engines across multiple emission tiers.