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TROUBLE SHOOTING
PROBLEM
PROBABLE CAUSE
REMEDY
Noisy operation
(under load).
a. Incorrect belt tension.
b. Dry spindle.
c. Loose pulley.
d. Loose belt.
e. Worn bearing.
a. Adjust tension.
b. Remove spindle and quill
assembly and lubricate.
c. Tighten pulley.
d. Adjust belt tension.
e. Replace bearing.
Excessive drill
wobble.
a. Loose chuck.
b. Worn spindle or
bearing.
c. Worn chuck.
d. Bent drill bit.
a. Tighten by pressing chuck
down on to a block of wood
against the table.
b. Replace spindle shaft or
bearing.
c. Replace chuck.
d. Renew drill bit.
Motor won’t start. a. Power supply.
b. Motor connection.
c. NVR switch
connection faulty.
d. Faulty switch.
e. Motor windings burned.
f. Pulley cover not closed.
g. Micro switch on cover
not operating.
a. Check power cord/fuse.
b. Check motor connections.
c. Check switch connections.
d. Replace switch.
e. Replace motor.
f. Close pulley cover.
g. Check operation of micro
switch, and renew/adjust as
necessary. (Consult your
Clarke dealer for advice).
Drill binds in work-
piece.
a. Excessive feed pressure
b. Loose belt.
c. Loose drill.
d. Incorrect bit speed.
e. Drill angles incorrect for
type of material.
a. Apply less pressure.
b. Check belt tension.
c. Tighten drill with key.
d. Refer to Cutting Speed chart
and adjust drill speed
accordingly.
e. Consult a technical manual
dealing with materials, drills
and cutting angles, and
sharpen drill accordingly.
Summary of Contents for 6505512
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