TM 5-3820-239-15
GENERAL MAINTENANCE INSTRUCTIONS
Section I.
SPECIAL TOOLS AND EQUIPMENT
Equipment
No special tools or equipment is required for
No specially designed tools or equipment
performing maintenance on the pneumatic
is required for performing maintenance on the
pneumatic drill.
drill.
Section II.
TROUBLESHOOTING
5-5. Drifter Drill Operates Sluggishly
5-3. General
or Eratically
This section provides information useful in
Possible remedy
Probable cause
diagnosing and correcting unsatisfactory oper-
ation or failure of the pneumatic drill or any
Dirt or foreign material Check hoses and fittings
for damage and re-
clogging hoses.
of its components. Each trouble symptom
strictions. Clean and
stated is followed by a list of probable causes.
replace as necessary.
The possible remedy recommended is de-
Dirt clogging drill ----Disassemble and inspect
scribed opposite the probable cause.
drill parts. Clean and
lubricate (para 6-3).
5-4. Drifter Drill Inoperative
Dieseling (ignition of air Check for possible over-
Possible remedy
Probable cause
lubrication or running on
and oil in cylinder)
air cushion. Reset mani-
which causes scoring
Air not getting to drill ----Inspect hoses, fittings,
fold lubricator meter-
and damage to parts.
remote control mani-
ing valve. Keep drill
fold and air feed motor
feed proper and avoid
running drill into and
Valve chest clogged ------Diaassemble and clean
out of hole at full
drill parts in approved
throttle.
solvent. Blow scale
and dirt from lines be-
Compressor supplying in- Check compressor and
fore connecting (para
main air line. Make
sufficient air.
sure main air valve is
Improper lubrication ----------Adjust manifold lubri-
fully open.
cator. Check that oil
Improper lubrication ----Readjust manifold lubrica-
vapor is observed in
tor if required. Check
oil level in lubricating
Damaged or worn parts -------Disassemble and inspect
oil reservoir. Check
drill for damaged parts.
piston and cylinder for
Clean and lubricate
heat checks. Replace
parts (para 6-3).
if required.
Drill assembly rods loose Check for misalinement.
or misalined.
Tighten rods evenly and
Blower tube broken -------- Replace blower tube if
securely.
damaged (para 6-3).
