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TROUBLE SHOOTING
LISTED BELOW ARE SOME OF THE MOST COMMON CAUSES FOR THE LEAD SCREW TAPPER TO MALFUNCTION. MALFUNCTIONS BEYOND THE SCOPE OF
THIS MANUAL SHOULD BE BROUGHT TO THE ATTENTlON OF YOUR ARO REPRESENTATIVE OR RETURN THE TOOL TO THE FACTORY FOR REPAIR.
CONDITION
LOW SPEED OR
FAILURE TO OPER-
ATE.
UNIT WILL NOT RE-
TRACT PROPERLY.
UNIT RETRACTS BE-
FORE COMPLETING
CYCLE.
ROUGH SPINDLE
ROTATION.
TAP BINDS IN
WORKPIECE.
UNIT WILL NOT RE-
MAIN STOPPED AF-
TER COMPLETION
OF CYCLE.
CHUCK OR HOLDER
DISENGAGES FROM
SPINDLE.
POSSIBLE CAUSE
1. INADEQUATE AIR SUPPLY.
2.
START SIGNAL TOO SHORT (MANU-
AL OR REMOTE).
3.
LEAKING OR DAMAGED GASKETS
(40524 AND 45459).
4.
WORN OR DAMAGED “0” RINGS
(Y325-17) IN BUSHING (41214-1).
5.
BROKEN OR BADLY WORN ROTOR
BLADES IN MOTOR.
1.
MANUAL START VALVE NOT RE-
LEASED, BROKEN VALVE SPRING
(31125), DAMAGED “0” RING ON
VALVE.
2.
REMOTE START SIGNAL NOT SHUT
OFF AND BLED (EXHAUSTED PROP-
ERLY).
3.
RETRACT TRIP TAB NOT PROPERLY
POSITIONED OR LOOSE ON ACTUA-
TOR (40521-1).
1. LEAKING OR DAMAGED GASKETS
(40524 AND 45459).
2.
WORN OR DAMAGED “0” RINGS
(Y325-17 AND 40264) IN BUSHING
(41215).
3.
WORKPIECE IS NOT PRE-DRILLED
FOR TAP OR HOLE IS GREATLY MIS-
ALIGNED.
1.
IMPROPER TENSION OF LEAD NUT
ON LEAD SCREW (THIS WILL BE EV-
IDENT BY EXCESSIVE HEAT ON
LEAD SCREW).
2.
WORN OR DAMAGED SPINDLE
BEARINGS (41864).
3.
IMPROPER LUBRICATION OF POWER
UNIT (MOTOR AND/OR GEARING) OR
DIRTY MOTOR (ROTOR BLADES
STICKING ETC.).
1. WORKPIECE IMPROPERLY ALIGNED
WITH TAP AXIS.
2. BACKLASH IN SPINDLES.
1. LEAKING OR DAMAGED GASKETS
(40524 AND 45459).
2.
WORN OR DAMAGED “0” RINGS
(Y325-17) IN BUSHING (41214-1).
1.
EXCESSIVE SIDE FORCE DUE TO
MISALIGNMENT OF WORKPIECE.
2.
DIRTY OR DAMAGED SURFACES AT
TAPER FIT.
CORRECTIVE ACTION
1.
CHECK AIR SUPPLY FOR CORRECT REGULATOR ADJUST-
MENT (90 P.S.I.G. MAX. WHEN TOOL IS OPERATING).
2.
DEPRESS MANUAL OR REMOTE VALVE LONG ENOUGH TO
PROPERLY START ADVANCE CYCLE (1/2 TO 1 SECOND).
3.
CHECK TORQUE ON SCREWS (Y154-57) AND TIGHTEN IN SE-
QUENCE AS SHOWN ON PAGE 11. REPLACE GASKETS IF NEC-
ESSARY.
4.
REPLACE “0” RINGS IN BUSHING (41214-1). REFER TO PAGE
11 FOR DISASSEMBLY AND REASSEMBLY.
5.
DISASSEMBLE MOTOR, CLEAN, INSPECT, REPLACE WORN OR
DAMAGED PARTS. REFER TO PAGES 8 AND 14.
1.
INSURE MANUAL START VALVE IS PROPERLY
RFI FASFD
-. ..---_.---.
DISASSEMBLE VALVE COMPONENTS FROM HOUSING, CLEAN,
INSPECT, REPLACE PARTS IF NECESSARY.
2.
INSURE THAT REMOTE 3-WAY VALVE HAS SHIFTED TO EX-
HAUST POSITION BEFORE TAPPER REACHES RETRACT
POINT.
3.
CHECK FOR PROPER ALIGNMENT AND TIGHTEN SCREW
(45457), SECURING TRIP TAB TO ACTUATOR (SEE FIGURE 2,
PAGE 4).
I.
CHECK TORQUE ON SCREWS (Y154-57) AND TIGHTEN IN SE-
QUENCE AS SHOWN ON PAGE 11. REPLACE GASKETS IF NEC-
ESSARY.
2.
REPLACE “0” RINGS IN BUSHING (41215). REFER TO PAGE 11
FOR DISASSEMBLY AND REASSEMBLY.
3.
CHECK WORKPIECE FOR PROPER ALIGNMENT WITH TAPPER
OR FOR PRE-DRILLED HOLE.
1.
REMOVE PIPE PLUG AT SIDE OF HOUSING (USING A 5/16” AL-
LEN WRENCH). ADJUST CAP SCREW TO INSURE LEAD NUT
TENSION IS PROPERLY SET. SEE PAGE 5 FOR TENSION AD-
JUSTMENT.
2.
REPLACE BEARINGS. REFER TO PAGE 16.
3.
INSURE LUBRICATOR IS FULL OF OIL AND GEARING IS LUBRI-
CATED REGULARLY, REFER TO PAGE 6. DISASSEMBLE POW-
ER UNIT SECTION (PAGES 12,13 AND 14), CLEAN, INSPECT,
REPLACE WORN OR DAMAGED PARTS, LUBRICATE.
1.
CHECK FOR PROPER ALIGNMENT OF WORKPIECE TO TOOL.
2.
CHECK FOR PLAY WHERE SPINDLE, LEAD SCREW SHAFT AND
LEAD NUT ARE CONNECTED BY TAPER PINS BY GRASPING
END OF LEAD SCREW SHAFT AND CHUCK AND TWISTING (BY
HAND) IN OPPOSITE DIRECTIONS. CHECK TORQUE ON SET
SCREWS.
I.
CHECK TORQUE ON SCREWS (Y154-57) AND TIGHTEN IN SE-
QUENCE AS SHOWN ON PAGE 11. REPLACE GASKETS IF NEC-
ESSARY.
2.
REPLACE “0” RINGS IN BUSHING (41214-1). REFER TO PAGE
11 FOR DISASSEMBLY AND REASSEMBLY.
I.
INSURE CORRECT ALIGNMENT OF WORKPIECE TO CHUCK OR
HOLDER AXIS.
2.
INSPECT, CLEAN, REPLACE PARTS IF NECESSARY. REFER TO
PAGE 16.
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