Electro-pneumatic control for hydraulic pump on concrete mixing lorry, has compressed air piston controlled by two electronic switches which are respectively provided in driver's cab of lorry and in rear of lorry

摘要

The control has a two 24 volt direct current electromagnet coils (4, 5), and compressed air piston controlled by 24 volt direct current electronic switches (2, 3), where the switches are push buttons or rocker buttons. The switches include a 2 ampere fuse (1). One electronic switch is provided in a driver's cab of a concrete mixing lorry and another electronic switch is provided in the rear of the lorry.