15
11.2 OTHER INSPECTION
Inspect the remaining length of the Carbon Brushes every 100 hours operation.
For the procedure for the inspection, refer to 8.1 REPLACEMENT OF CARBON BRUSHES.
WARNING!!
Always disconnect machines from power supply before starting any maintenance, cleaning, and
inspection.
TROUBLESHOOTING
If you have any troubles during operation, refer to the followings.
Troubles
What to do first
Possible Causes
Countermeasures
Fragments of iron or stone Is jammed
between the Core-Bit and the drilled
core.
Take the following procedures in order.
(1) Disconnect Core-Bit from Motor
(2) Rotate the Core-Bit with a Spanner.
(3) Pull out the Core-Bit with the Tool to take
out bit *1 from the concrete. And the, get
rid of the fragments.
(4) Crack around the Core-Bit with a Power
Tool like a Hammer Drill.
Core-Bit is
jammed.
(1) Turn off the switch.
(2) Unplug the Machine
from a power source.
(3) Check the possible
causes written in the
right side columns.
Segments of Core-Bit are worn out.
Replace the Core-Bit with new one.
(1) Turn off the switch.
(2) Unplug
the Machine
from a power source.
(3) Check the drained
water.
The Machine is cutting rebar if iron
powder is shown in the drained water
Resume the operation, and take care not to
push the Core-Bit too hard.
Segments are worn out.
Replace the Core-Bit with new one.
Diamonds on segments are invisible.
(Segments are glazed.)
Drill bricks, or grind the Segments with
abrasives so that the Diamonds can appear
on the surface of the Segments.
(1) Turn off the switch.
(2) Unplug the Machine
from a power source.
(3) Check the Core-Bit.
Concrete slurry is stuck between the
segments.
Increase the amount of cooling water or grind
the segments with abrasives.
Carriage Block has a play on the
Column.
Adjust the Carriage Block.
Spindle Shaft of the Motor is bent.
Have the Spindle replaced by Shibuya's
authorized dealer.
Drilling
performance
goes down.
(1) Turn off the switch.
(2) Unplug the Machine
from a power
source.
(3) Check the possible
causes written in
the right side
columns.
The tube of the Core-Bit is out of
shape.
Replace the Core-Bit with new one.
(1) Check PRCD is ON or
OFF.
PRCD is OFF.
Turn PRCD ON.
The Variable
Trigger does
not work.
(2) Check the mode
change switch inside
switch cover
Mode Change switch is turned to Rig
Mount-Mode.
Turn it to Hand-Held Mode.
*1
The Tool to take out bit is available as an optional item, which enables you to take out easily the jammed Core-Bit from the
concrete by the driving force of its threads.
