Hitachi C 8FSE Technical Data And Service Manual page 49

Item Phenomenon
3 Saw blade is locked.
4 Saw blade does not
rotate when switch is
triggered.
5 Saw blade runs too
slow
(4,950 min -1 or less).
6 Light (H) Ass'y does
not light.
(Only Model C 8FSHE)
Cause
(a) Excessively fast
cutting speed
(b) Core diameter of
extension cord is too
small.
(c) Excessive cutting
force is applied due to
dull saw blade.
(d) Incorrect saw blade is
used.
(e) The saw blade binds
in workpiece during
cutting because
workpiece is warped
or bent.
(a) Power cord is not
connected to power
supply.
(b) Carbon brush wear
exceeds allowable
limit (5 mm).
(c) Contact failure of the
switch
(a) Power supply voltage
is lower than rated
voltage.
(a) Improper wiring
(b) Switch failure
(c) Switching power
supply failure
(d) Light (H) Ass'y failure
-46-
Factory
Inspection, repair or adjustment
standard
- • Reduce cutting speed.
- • Use a thicker and shorter
extension cord.
- • Resharpen saw blade.
- • Use a suitable Hitachi
supplied saw blade.
• An increased number of teeth
on the saw blade increases
the cutting resistance. When
using a saw blade with a large
number of teeth, reduce the
cutting speed.
- • Correct workpiece
deformation with planer.
- • Check power supply voltage.
• Connect the power cord to
power supply.
- • Check the Carbon Brushes
[160] for wear.
• Replace the Carbon Brushes
[160].
- • Check the Switch (3P Faston
Type) W/O Lock [170] for
conductivity.
• Replace the Switch (3P
Faston Type) W/O Lock [170].
- • Check for power supply
voltage.
• Check if extension cord is
appropriate. See Instruction
Manual for appropriate
extension cords.
- • Check the wiring.
- • Check the Switch (W/Cover)
[167] for conductivity.
• Replace the Switch (W/Cover)
[167].
- • Check the Switching Power
Supply Ass'y [165] for
conductivity, input and output
referring to "Wiring diagram."
• Replace the Switching Power
Supply Ass'y [165].
- • Replace the Light (H) Ass'y
[175].