Figure 14-21.-Crawler-mounted rock drill.controlled by the tram valve, mounted on the maintank, inlet manifold, return manifold, and hydraulic/frame.pneumatic piping.POWER UNITHydraulic SystemThe Power unit supplies the rock drill with hydraulicThe boom/guide set-up control valves and drilland pneumatic power.It consist of an enginecontrol valves are located at the side by the drill guide.four-coupled gear pumps, compressor air end, receiverOther control valves are located at the front side of the14-16
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