Model t10446 heavy-duty hammer drill-10-
troubleshooting
symptom possible cause solution
tool will not start. 1. no power to the tool.
2. Fuse is blown or circuit
tripped.
3. switch is at fault.
4. Carbon brushes are worn.
5. Motor is at fault.
1. Make sure power circuit
is adequate and providing
power.
2. Check/fix loose or worn
wires and shorts; replace
fuse or reset circuit break-
er.
3. replace switch.
4. replace the carbon brush.
5. replace motor.
Bit rotates slowly. 1. too much pressure on the
hammer drill.
2. Bit is dull/damaged.
3. inadequate power to the tool.
1. apply medium pressure to
the drill; allow the bit to do
the work.
2. sharpen/replace.
3. Make sure power circuit is
adequate and there are no
shorts.
Bit is stuck in hole. 1. tool turned OFF with bit still in
hole.
2. Bit is in contact with an item
other than masonry material.
1. always remove the bit from
the hole while it is still rotat-
ing. disconnect tool from
power, disengage bit from
chuck, then remove the bit
from the hole.
2. always make sure that there
are no foreign items in the
area of drilling. remove the
bit from the hole as instruct-
ed in solution 1 above.
gearbox becomes
excessively hot.
1. tool is overloaded.
2. excessively long operational
cycle.
3. not enough gearbox lubrica-
tion.
1. reduce pressure on tool.
2. allow the tool and operator
to rest.
3. re-lubricate the gearbox.
section 7: service