The hands on trainer allows the student to learn the basic test and maintenance procedures for the refrigerant loop. Charging, checking for leaks, replacing components, servicing parts, and other tasks are covered in this program. The components are based off GM parts and the unit is pre assembled with a compressor operating with R134a refrigerant. A large electric motor is mounted with a control housing in a self contained heavy duty roller cart. Included are a set of charging hoses and manifold gauges, and battery cables.