Store the pneumatic rock drill in the
maximum stability position as shown in figure 24, when
not in operation.
Figure 2-4. Maximum stability position for rock drill
tramming and storage.
Operation of Equipment
Tramming the Rock Drill.
(1) Operation of Tram Clutch. The internal
clutch mechanism for each tram motor operates by a
sliding, splined coupling that couples two splined shafts.
When the coupling is all on one shaft, the tram motor is
disengaged from the drive sprocket (towing position).
When the coupling is half over each of the male splines,
the gear train is in tramming position. There are no
intermediate positions that are satisfactory. Figure 2-5
shows the proper engaged position, disengaged position,
and the wrong position of the clutch handles.
Figure 2-5. Engaging the rock drill for tramming.
(2) Connecting Air Supply. Secure the air
compressor to the rock drill and connect the main air
supply hose as illustrated in figure 2-2.
(3) Engaging for Tramming.
(a) Start the air compressor (para 2-3) and
operate the tram motors to make sure they rotate freely.
(b) Engage the rock drill for tramming as
illustrated in figure 2-5.
(4) Disengaging for Towing.
Disengage the clutch only when rock drill
is parked on terrain that will not allow the
rock drill to run free. When disengaging,
it may be necessary to jog the tram
motor back and forth so the backlash
will relieve any external pressure that
may be opposing engagement.
It is possible to tram the rock drill with
the clutch partially disengaged as shown
in circled view of figure 2-5. In this
position, it is also possible for the clutch
mechanism to slip out of engagement,
allowing the drill to run away.