TORO TIMECUTTER Z SERIES Wont Move

Hydrostatic Transaxle (Right Side)

The hydrostatic transaxle uses an axial piston pump to create hydraulic pressure that drives an internal motor. If internal seals fail or the swash plate becomes stuck, the right-side motor cannot generate the torque required to turn the axle, even if the input pulley is spinning. On these integrated units, internal components are rarely serviced individually, necessitating a full assembly replacement.

Square Axle Key

This is a small metal key that locks the wheel hub to the transaxle output shaft. If the mower hit an obstacle or the hub nut loosened, the key can shear or fall out, resulting in a total loss of mechanical torque transfer. In this failure mode, the transaxle and axle shaft will spin correctly, but the wheel remains stationary.

Bypass Valve Rod Linkage

The bypass rod allows the mower to be pushed manually by opening a 'short circuit' in the hydraulic loop to prevent fluid lock. If the rod is bent, stuck, or the cotter pin has failed, the internal bypass valve may remain in the 'open' position, preventing the transaxle from building the pressure necessary for drive engagement.