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TROUBLE SHOOTING
M103
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LISTED BELOW ARE SOME OF THE MOST COMMON CAUSES FOR THE SELF-FEED DRILL TO MALFUNCTION. MALFUNCTIONS BEYOND THE SCOPE OF THIS
MANUAL SHOULD BE BROUGHT TO THE ATTENTION OF YOUR ARO REPRESENTATIVE OR RETURN THE TOOL TO THE FACTORY FOR REPAIR.
CONDlTlON
FAILURE TO FEED
OR IRREGULAR OR
ERRATIC FEED.
POSSIBLE CAUSE
1. INADEQUATE AIR SUPPLY.
2. FEED CONTROL VALVES IMPROPER-
LY ADJUSTED.
3. AIR LEAK AROUND CAP (12).
4. DIRT OR DAMAGED “0” RINGS ON
SPOOL VALVE (14).
5. CLOGGED AIR PASSAGE IN VALVE
HOUSING.
1. INADEQUATE AIR SUPPLY.
2. CLOGGED AIR PASSAGE IN VALVE
HOUSING.
1. PISTON NOT FULLY RETRACTED.
2. DAMAGED “0” RING (11) INSIDE
VALVE HOUSING.
I. IMPROPER ADJUSTMENT OR ALIGN-
MENT BETWEEN ADJUSTMENT
SCREW AND BUTTON BLEED VALVE.
2. FEED CONTROL VALVES (24) IM-
PROPERLY ADJUSTED OR DIRTY.
1. AIR LEAK AROUND CAP (12).
1. DAMAGED “0” RINGS IN MUFFLER
CAP, VALVE HOUSING OR SPOOL
VALVE OR SEALS ON PISTON.
i. CLOGGED AIR PASSAGE IN VALVE
HOUSING.
LOW SPEED OR
MOTOR FAILS TO
OPERATE
MOTOR CONTINUES
TO RUN AFTER RE-
TRACTION.
FAILURE TO RE-
TRACT
ACCESSORIES
--
CORRECTIVE ACTION
1. CHECK AIR SUPPLY FOR CORRECT REGULATOR ADJUST-
MENT (90 P.S.I.G. MAX. WHEN TOOL IS OPERATING).
2. REFER TO “SET-UP PROCEDURE”, PAGE 1.
3. CHECK FOR DAMAGE TO “0” RING. CHECK AND BE SURE
CAPS ARE PROPERLY TIGHTENED.
4. REFER TO VALVE SECTION, PAGE 4, AND REMOVE SPOOL
VALVE. INSPECT, CLEAN AND REPLACE “0” RINGS.
5. REMOVE VALVE HOUSING FROM TOOL. DISASSEMBLE AND
BLOW ALL AIR PASSAGES CLEAR OF DEBRIS.
1. CHECK AIR SUPPLY FOR CORRECT REGULATOR ADJUST-
MENT.
2. REMOVE VALVE HOUSING FROM TOOL. DISASSEMBLE AND
BLOW ALL AIR PASSAGES CLEAR OF DEBRIS.
1. BE SURE PISTON IS NOT OBSTRUCTED AND IS RETURNED
ALL THE WAY BACK.
2. REMOVE VALVE HOUSING FROM TOOL. REPLACE “0” RINGS.
I. REFER TO “SET-UP PROCEDURE”, PAGE 1.
2. CHECK ADJUSTMENT, REFER TO PAGE 2. REMOVE, INSPECT
AND CLEAN.
L CHECK FOR DAMAGE TO “0” RING. CHECK AND BE SURE
CAPS ARE PROPERLY TIGHTENED.
1. DISASSEMBLE, INSPECT AND REPLACE “0” RINGS AND/OR
SEALS.
i. REMOVE VALVE HOUSING FROM TOOL. DISASSEMBLE AND
BLOW ALL AIR PASSAGES CLEAR OF DEBRIS.
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