Service manual

20
VENT
TRIGGER
VALVE
PILOT
VALVE
AIR
MOTOR
CAPPED
ACCESSSORY
PORT
COMPRESSED
AIR
COMPRESSED AIR
TRAPPED COMPRESSED AIR
VENT (ATMOSPHERE)
VENT
VENT
BYPASS
COVER
FEED PISTON
DWELL VALVE
FIGURE 3
EXHAUST
DEPTH CONTROL
ADJUSTMENT
RETRACT & DWELL PORT IS SEALED
WHEN FULL DRILL & COUNTERSINK DEPTH
HAS BEEN REACHED CAUSING SHIFT OF
RETRACT AND DWELL VALVE.
CLAMP- UNCLAMP
PISTON
PNEUMATIC CHECK VALVE
BOOSTER
PUMP
(OPTIONAL)
VENT
UNCLAMP CHECK VALVE
RETRACT AND
DWELL VALVE
(SEE DETAIL A)
3. DIAGRAM OF AIR SYSTEM AT PRE-SET CUTTER DEPTH
AND START OF RETRACT. Trigger depressed, air motor running
collet clamped, cutter continues feeding until depth control
adjustment covers retract and dwell port, shifting retract and
dwell valve, initiating rapid cutter retract.
RETRACT AND DWELL PORT VENTS
UPON RETRACT MOVEMENT OF
DEPTH CONTROL ADJUSTMENT
(DETAIL A)