Figure 3-5. Hydraulic oil filter service.
Section VI. MAINTENANCE OF PNEUMATIC SYSTEM
The rock drill pneumatic system consists of the air inlet
lubricator fitting, ram and feed control valve, air motor,
drifter drill engine, and the backhead air metering valve.
The operators maintenance is limited to servicing the
lubricator and adjusting the backhead air metering valve.
Refer to figures 1-3 and 1-4 for an air system schematic
Bulkhead Metering Valve Adjustment
Adjust the bulkhead metering valve as illustrated in figure