Figure 3-7. Air line lubricator fitting adjustment.
3-21.
Pneumatic Hoses
Inspect the pneumatic hoses and fittings for loose.
connections
or
ruptured
hoses.
Tighten
loose
connections. Report defective hoses to organizational
maintenance.
Section VII. MAINTENANCE OF LIFT, SWING, FEED AND LEVELING
MECHANISM
3-22.
General
a.
The lift and swing mechanism consists of a
pivot, boom assembly and dump assembly.
b.
The feed and leveling mechanism consists of the
feed assembly, centralizer, feed chain, drill trunnion and
sprockets.
3-23.
Lift and Swing Components
Inspect all pivot points, bushings and pins on the lift and
swing mechanism for damage or excessive wear. Report
all defects to organizational maintenance.
3-24.
Feed and Leveling Components
a.
Inspect
the
feed
assembly
for
damaged
components.
b.
Inspect the centralizer to make sure the arms
operate freely. Keep arm pivot areas free of dirt and
stones.
c.
Inspect the feed chain for proper adjustment.
The chain should have a slight sag at all times. If
adjustment
is
required,
report
the
condition
to
organizational maintenance.
d.
Inspect the drill trunnion for proper operation.
3-10
