Figure 14-21.-Crawler-mounted rock drill.
controlled by the tram valve, mounted on the main
tank, inlet manifold, return manifold, and hydraulic/
frame.
pneumatic piping.
POWER UNIT
Hydraulic System
The Power unit supplies the rock drill with hydraulic
The boom/guide set-up control valves and drill
and pneumatic power.It consist of an engine
control valves are located at the side by the drill guide.
four-coupled gear pumps, compressor air end, receiver
Other control valves are located at the front side of the
14-16
