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TROUBLE SHOOTING
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 BROUGHTTO THE ATTENTlON OF YOUR ARO REPRESENTATIVE OR RETURN THE TOOL TO THE FACTORY FOR REPAIR.
LOW SPEED OR
FAILURE TO OPER-
ATE.
MOTOR DOES NOT
SHUT OFF AFTER
COMPLmON OF
CYCLE.
IRREGULAR OR ER-
RATlC FEED.
FAILURE TO FEED
FORWARD.
FAILURE TO RE-
TRACT.
POSSIBLE CAUSE
1. INADEQUATE AIR SUPPLY.
2.
IMPROPER LUBRlCATlON OF UNIT
(MOTOR
AN/OR
GEARING), DIRTY
MOTOR (ROTOR BLADES STICKING,
ETC.), OR BROKEN OR BADLY WORN
ROTOR BLADES OR BEARINGS IN
MOTOR.
3.
MOTOR NOT TlGHTENED DOWN OR
IMPROPERLY SPACED.
1.
WORN OR DAMAGED “0” RINGS IN
VALVE HOUSING (44919).
1. INADEQUATE AIR SUPPLY.
2.
FEED CONTROL NEEDLE VALVES
(34817) IMPROPERLY ADJUSTED OR
RESTRICTED WlTH FOREIGN MA-
TERIAL.
3.
WORN OR DAMAGED “0” RINGS ON
SPOOL VALVE (44978).
0.
WORN OR DAMAGED “0” RINGS ON
PISTON (44965), IN HOUSING (44989)
OR VALVE HOUSING (44919).
i.
LEAKING OR DAMAGED GASKETS
(44948, 44950, 44956 OR 42639).
6.
TlMlNG VALVE (69231) IMPROPERLY
ADJUSTED OR RESTRICTED (DIRTY).
1.
SEE ITEMS 1 THRU 3 OF ERRATIC
FEED.
2.
LEAKING OR DAMAGED GASKET
(44950).
3.
IMPROPER SET-UP OF ACCESSORY
HYDRAULIC CHECK (38922-)
I. SEE ITEMS 1 THRU 3 OF ERRATIC
FEED.
2. LEAKING OR DAMAGED GASKET
(44958 OR 42639).
L IMPROPER ALIGNMENT OR CON-
TACT OF STROKE ADJUSTMENT
SCREW (Y157-64) AND RETRACT
VALVE STEM (44981).
0. BADLY WORN OR DAMAGED “0”
RING ON RETRACT VALVE STEM
(44981).
CORRECTIVE ACTION
1. CHECK AIR SUPPLY FOR CORRECT REGULATOR ADJUST-
MENT (96 P.S.I.G. MAX. WHEN TOOL IS OPERATING).
2. BE SURE LUBRICATOR IS FULL OF OIL AND GEARING IS LU-
BRICATED REGULARLY, REFER TO PAGE 4. DISASSEMBLE,
CLEAN, INSPECT, REPLACE WORN OR DAMAGED PARTS, LU-
BRICATE. REFER TO PAGES 4, 6 AND 8
3. BE SURE BEARING LOCK SCREW (44898) IS SUFFICIENTLY
TIGHTENED. INSURE PROPER INSTALLATION OF MOTOR. RE-
FER TO PAGE 8.
1.
DISASSEMBLE, CLEAN, INSPECT, REPLACE “0” RINGS. REFER
TO PAGES 4 AND 10.
1.
CHECK AIR SUPPLY FOR CORRECT REGULATOR ADJUST-
MENT (90 P.S.I.G. MAX. WHEN TOOL IS OPERATING).
2.
DISASSEMBLE, CLEAN, INSPECT, REPLACE “0” RINGS IF NEC-
ESSARY. REFER TO PAGES 4, 8 AND 9.
3.
DISASSEMBLE, CLEAN, INSPECT, REPLACE “0” RINGS. REFER
TO PAGES 4, 8 AND 9.
1.
DISASSEMBLE, CLEAN. INSPECT, REPLACE “0” RINGS. REFER
TO PAGES 4, 5, 8, 9 AND 10.
i.
CHECK TORQUE ON CAP SCREWS. BE SURE ALL SCREWS
ARE PROPERLY TIGHTENED. REPLACE GASKET(S), IF NEC-
ESSARY.
6.
DISASSEMBLE, CLEAN, INSPECT TIMING VALVE AND BALL
CHECK AREAS. REFER TO PAGES 3, 4, 6 AND 9.
I.
SEE ITEMS 1 THRU 3 OF ERRATIC FEED.
2.
BE SURE SCREWS IN END CAP (44949) ARE PROPERLY TIGHT-
ENED. REPLACE GASKET IF NECESSARY.
3.
BE SURE PROPER SET-UP AND ADJUSTMENT PER INSTRUC-
TIONS ON PAGE 12.
I.
SEE ITEMS 1 THRU 3 OF ERRATIC FEED.
!.
CHECK TORQUE ON CAP SCREWS (Y154-38). REPLACE GAS-
KET IF NECESSARY.
I.
BE SURE TRIP BRACKET (44909) IS PROPERLY POSITIONED
ON PISTON ROD, ALLOWING STROKE ADJUSTMENT SCREW
TO ALIGN AXIALLY WITH VALVE STEM. REFER TO SET-UP
PROCEDURE, PAGE 3.
1.
DISASSEMBLE AND REPLACE “0” RING. PAGE 10.
MAINTENANCE TOOL FURNISHED WITH EACH MODEL
Y106-3 ALLEN WRENCH (1/8”)
Y106-5 ALLEN WRENCH (3/16”)
Y106-8 ALLEN WRENCH (5/16”)
Y106-21 ALLEN WRENCH (7/64”)