Table 3-2. Organizational Preventive Maintenance Checks and Services for Crawler-mounted Rock Drill
ITEM TO BE
Note: Checks 1 through 4 are for units
equipped with retrofit kit.
Any bolts loose or
Check all bolts and nuts on feedshell for
tightness. Pay particular attention to
drifter drill mounting bolts and feed-
shell slide mounting bolts.
Chain cannot be ad-
Check chain deflection weekly. Ensure
that chain is not so tight that no deflec-
tion occurs not so loose that is sags. Ad-
just if necessary (see paragraph 3-25 or
Air Hose Connections Check all air hose connections and
tighten if necessary.
Measure clearance between slide bar
Slide Bar Shims
and feedshell channel. If clearance is
greater tha: 1/8 in., remove slide bar and
adjust shims until clearance is less than
1/8 in. (see paragraph 7-12). Repeat for
all four slide bars.
Close centralizer and measure inside di-
ameter of bore. Replace centralizer
blocks when inside diameter is greater
than 2 in. (see paragraph 7-9).
Check torque on side rod mounting
nuts. Gradually tighten to 150 lb-ft.
Adjust brakes (see paragraph 3-38).
Check and tighten sprocket stud nuts if
Final Drive Sprockets
required (see paragraph 3-36b).
(Check and adjust tracks if requircd (see