Pump/Motor Assembly

Fig. 6 - Pump/Motor Assembly And Heat Shield:

The pump/motor assembly is mounted to the transaxle below the hydraulic assembly, (see Fig. 6). Integral to the pump/motor assembly is an accumulator using a sliding piston configuration with a nitrogen pre-charge of (3,172 kPa) 460 psi. The pump/motor is an electrically driven PUMP which takes low pressure brake fluid from the hydraulic assembly fluid reservoir and pressurizes it. The pressurized fluid is then stored in the piston accumulator and hydraulic bladder accumulator for power assist and ANTI-LOCK braking. Operation of the pump/motor is controlled by the dual function pressure switch through the pump/motor relay. Rubber isolators are used to mount the pump to its bracket for noise isolation. The pump/motor assembly is connected to the hydraulic assembly with a low pressure return hose and a high pressure hose.