... heavy truck 8x6 special vehicle. The transfer case, main drive system, gear box, double-winch, mud pump, turntable, drill tower ... 20A reciprocate double-cylinder double-acting piston mud pump, controlled clutch combine or separate pneumatic. The power of drilling rig ... and drilling tower are hydraulic controlled. Transfer case, mud pump clutch system are air operated. The appearance of rig is pretty, ...