Repair Guide - Hitachi C 10FSB Technical Data And Service Manual

12. REPAIR GUIDE

Item Phenomenon
1 Inaccurate cutting
Inaccurate
• • •
squareness of the cut
surface
Cut surfaces do not
• • •
fit together properly.
Saw blade
Fence (B)
Turn table
Fig. 87
Fence (B)
Squareness
0.15/100
Saw blade
Fig. 88
Fence (B)
Fig. 89
Cause (s)
a Inaccurate
squareness between
the turn table and the
saw blade causes the
saw blade to cut into
the workpiece at an
angle.
Squareness
0.15/100
b Excessive deflection
of the saw blade
(Excessive vibration)
Fence (A) c Inaccurate
squareness between
fences (A) and (B) and
the saw blade
Squareness
0.15/100
d Surfaces of fences (A)
and (B) are not
accurately aligned,
causing workpiece to
deviate from proper
squareness.
0.1 max.
e Inaccurate surface
Fence (A)
flatness of the turn
table.
f Squareness between
0.1 max.
the saw blade and the
turn table is changed
when sliding.
Factory
standard
0.15/100
(Dummy disc)
(Fig. 87)
When sliding (tip)
0.25/100
(Dummy disc)
0.2/245
(Dummy disc)
0.15/100
(Fig. 88)
0.1 or less
(Fig. 89)
0.15 or less
Same as a
(Fig. 90)
--- 65 ---
Inspection, repair or adjustment
• Readjust squareness with the
Nylock Bolt M8 x 25 [12].
• Adjust the clearance between
the Bushing [108] and slide
pipe (A) with the Hex. Socket
Set Screw M8 x 16 [110].
• Replace Hinge (A) Ass'y [75]
or Gear Case [196] or Turn
Table Ass'y [26] (if deformed).
• Replace the TCT Saw Blade
[198].
• Check for surface defects on
two Washers (D) [199] and
repair with a file as
necessary.
• Replace two Washers (D)
[199].
• Loosen the Bolt (W/Washers)
M8 x 35 (Black) [22] and
adjust as necessary.
• Replace Fences (A) [53] and
(B) [23].
• Loosen the Bolt (W/Washers)
M8 x 35 (Black) [22] and
adjust surface alignment of
Fences (A) [53] and (B) [23]
as necessary.
• Replace Fences (A) [53] and
(B) [23].
• Replace the Turn Table Ass'y
[26].
• Check precision after press-
fitting slide pipes (A) and (B)
of Hinge (A) Ass'y [75].
If precision is poor, replace
them as necessary. (Fig. 90)