TM 5-3820-241-34
CHAPTER 2
DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT
2-1. Tools and Equipment
Tools and equipment and repair parts issued
with, or authorized for the pneumatic rock drill
are listed in TM 5-3820-241-34P.
2-2. Special Tools and Equipment
No special tools and equipment are required by
direct and general support maintenance personnel
for performing maintenance on the pneumatic
rock drill.
2-3. Maintenance Repair Parts
Repair parts and equipment authorized for direct
and general support maintenance is listed in TM
5-3820-241-34P.
Section II. TROUBLESHOOTING
2-4. Introductory Information
This section contains troubleshooting information
for locating and correcting most of the operating
troubles which may develop during operation of
the pneumatic rock drill. Each malfunction for an
individual component, unit or system is followed
by a list of tests or inspections which will help you
to determine probable causes and corrective
actions to take. You should perform the tests,
inspections and corrective actions in the order
listed.
2-5. Troubleshooting Table
Table 2-1 lists the direct and general support
maintenance troubleshooting malfunctions, tests,
inspections and corrective actions.
Table 2-1 Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1 DRILL MOTOR IS INOPERATIVE
Step 1. Check for gummed oil or dirt in motor operating parts.
Disassemble and clean drill motor (para 5-10, 5-12).
Step 2. Check for defective feed control valve.
Replace feed control (para 5-13, 5-16).
Step 3. Check for defective drill motor repair or replace drill motor (para 5-9, 5-12).
2 DRILL OPERATES SLUGGISHLY OR ERRATICALLY
Step 1. Check for gummed oil or dirt in drill operating parts.
Disassemble and clean drill motor (para 5,-10, 5-12).
Step 2. Check for defective feed control valve.
Repair or replace feed control valve (para 5-14, 5-16).
3 DRIFTER DRILL FAILS TO TRAVEL ON CARRIAGE OR TRAVELS TOO SLOW
Step 1. Check for defective feed control valve.
Replace feed control valve (para 5-14, 5-15).
Step 2. Check for defective feed transmission.
Repair or replace feed transmission (para 5-6, 5-8).
Step 3. Check for defective feed motor.
Repair or replace feed motor (para 5-2, 5-4).
4 TRAMMING MOTORS FAIL TO TRAM ROCK DRILL OR TRAM TOO SLOW
Step 1. Check for defective tramming throttle valve.
Repair or replace throttle valve (para 4-10, 4-12).
Step 2. Check for defective tramming motor final drive.
Repair or replace final drive (para 6-6, 6-8).
2-1
