Minnich A-1-24, Operators & Service Manual

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17
Dowel Drill Manual
TROUBLE SHOOTING AIR DRILL
Cause Remedy
DRILL NOT GETTING AIR 1. On Multi Drill units, switch airline with drill
that is working properly. If drill now runs
check the air control valve. If the valve works,
check the drill.
2. Check clave on air compressor and drill unit
to be certain they are completely open
3. Check compressor. It should have 100SCFM
(47.20m^3/sec.) per drill and 110PSI (7.6 BAR)
at drill manifold when drilling with large drills.
4. Make certain all fittings are connected prop-
erly and not leaking.
COUPLING OR HOSE OBSTRUCTION Remove Obstruction
FAILURE IN THE ELECTRICAL CIRCUIT Check switches, connections, coilds, ground &
voltage. If the power unit (backhoes, grader,
ETC.) is being jump started, check the AMPS &
voltage being jump supplied to coils from the
battery, it may be too low.
FAILURE OF DRILL SOLENOID VALUE
(MULTI DRILL UNITS WITH REMOTE
ELECTRICAL CONTROLS)
Check valve - you should be able to feel the so-
lenoid move when it is actuated. Make sure you
have current to the solenoid coil. Replace the
dolenoid if there is no movement.
MECHANICAL FAILURE OF DRILL Disassemble the drill & inspect for damaged
parts.
PROBLEM: DRILL DOES NOT RUN