TM 5-3820-241-34
Section III. GENERAL MAINTENANCE INSTRUCTIONS
2-6. General
a. This section provides general cleaning,
inspection,
and repair instructions that are
common to components used with the pneumatic
rock drill.
b. Special cleaning, inspection and repair
instructions applicable to any individual com-
ponent is covered with that component in the
applicable sections of this manual.
2-7. General Cleaning Instructions
a. Metal Parts.
(1) Prior to removal or disassembly of major
components, clean off excess oil or dirt with a
cleaning solvent (Fed Spec P-D-680) or steam
clean.
(2) Use a cleaning solvent (Fed Spec P-D-
680) to clean metal parts and hardware.
(3) Use brushes to clean irregular shaped
surfaces: Use wooden pegs to clean ports and
orifices. Use a lint free cloth to wipe parts clean.
(4) Exercise care when handling machined
and polished surfaces to avoid nicks and other
damage. Do not immerse more than one metal
machined part in solvent at the same time unless
such parts are separated or protected from
contacting each other.
b. Cables. Wipe cables clean with a cloth
dampened with cleaning solvent (Fed Spec P-D-
680).
2-8. General Inspection Instructions
a. General. Perform an inspection of all parts
as soon as possible after cleaning. Instructions for
specific inspection procedures are included in the
text at the point in overhaul procedures where the
inspection must be performed.
b. Visual Inspection. Visually inspect all
machined and polished areas. Use a strong light
to shine across polished surfaces to inspect for
scoring, cracks, breaks or excessive wear.
2-9. General Repair Instructions
a. Thread Repair. Use the proper size tapping
tool to repair tapped holes. Discard and replace all
hardware that has defective threads.
b. Press Fit Parts.
( 1 ) B u s h i n g s m a y r e q u i r e t h e u s e o f
pneumatic or hand operated arbor press.
(2) Preheat all press-fit parts before
reassembly if specified. Use a lubricant if
necessary to reduce abrasive action.
Section IV. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS
2-10. General
This section contains instructions for removal and
installation of
major
components of
the
pneumatic rock drill assembly to facilitate the
repair and overhaul procedures. Complete repair
and overhaul instructions are covered in sub-
sequent sections of this manual.
feed control valve and feed assembly from the
trunnion.
b. Attach a suitable hoist with at least 2,000
lbs capacity and remove the tilt and swing boom
assembly in numerical sequence as illustrated in
figure 2-1.
2-11. Tilt and Swing Boom Assembly Removal
a. Refer to TM 5-3820-241-12 and remove the
2-3
