... ; 400meter depth wiht 500mm diameter hole 1. BZC-400BCA truck mounted drilling rig is designed by our engineers. It is a ... the main drive system, the transfer case, gearbox, double-winch unit, mud pump, turntable, drilling tower, feed mechanism are set up ... hydraulic controlled. Transfer case and mud pump clutch system are air operated.9. According to client’s requirement, the rig can ...