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9. TROUBLESHOOTING
No.
Phenomenon
1
Inaccurate cutting
Tipped saw blade
2
does not rotate when
switch is triggered.
3
Tipped saw blade is
locked.
4
Movement of vise is
not smooth.
Cause
(1) Excessive deflection of tipped saw blade
(2) Inaccurate parallelism due to surface
defects (such as impact marks and
scratches)
(3) Inaccurate squareness between vise (B)
and tipped saw blade
(4) Inaccurate squareness between base and
tipped saw blade
(5) Inaccurate surface flatness of base
(6) Excessive cutting force (pressure) is
applied due to dull saw blade.
(7) Excessive deflection of tipped saw blade
due to large chipping
(1) Power cord is not connected to power
supply.
(2) Carbon brush wear exceeds allowable
limit (6 mm).
(3) Contact failure of switch
(4) Overload protector is activating.
(1) Core diameter of extension cord is too
small.
(2) Excessive cutting force (pressure) is
applied due to dull saw blade.
(3) Incorrect tipped saw blade is used.
(4) Improper workpiece is used.
(1) Slide base is deformed.
(2) Bolt washer is deformed.
(3) Adhesion of cutting dust
(4) Screw is worn.
(5) Vise screw is deformed.
Factory standard
0.4/300 maximum
0.02/75 mm dia.
maximum
89
1˚
90
1˚
0.5 mm maximum
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6 mm or more
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0.25 mm maximum
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Inspection
Repair
•
Adjustment
Replace the TCT Saw Blade [87].
Check for impact marks or scratches
on the Wheel Washer [86] and repair it
by filing if any.
Replace the Wheel Washer [86].
Loosen the Bolt (W/Washers) M10 x 25
(Black) [105] and adjust again.
Replace Vise (B) [108].
Check for deformation at the hinge
of the Base [135] or the Gear Case
[29]. If deformed, replace the Base
[135] or the Gear Case [29].
Replace the Base [135].
Replace the TCT Saw Blade [87] with
new one.
Replace the TCT Saw Blade [87] with
new one.
Check power supply voltage.
Connect the Cord [23] to power supply.
Check the Carbon Brushes [5] and
replace them if worn.
Check the Switch [61] for conductivity.
Replace the Switch [61].
Wait several minutes and press the
Overload Switch [44] to restart.
Use a thicker and shorter extension
cord.
Replace the TCT Saw Blade [87] with
new one.
Use a suitable Hitachi-supplied tipped
saw blade for metal cutting.
Stop use of the workpiece.
Repair or replace the Slide Base [90].
Replace the Bolt Washer M10 [138].
Remove the cutting dust. Clean the
Clutch [96] and the Vise Screw [99].
Replace the Clutch [96] and the
Vise Screw [99].
Replace the Vise Screw [99].
•
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