Repair Guide - Hitachi C 12LSH 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.
Fig. 77
Fig. 78
Fig. 79
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.
b Excessive deflection
of the saw blade
(Excessive vibration)
c Inaccurate
squareness between
fence (A) and fence
(B) and the saw blade
d Surfaces of fence (A)
and fence (B) are not
accurately aligned,
causing workpiece to
deviate from proper
squareness.
e Inaccurate surface
flatness of the turn
table.
f Squareness between
the saw blade and the
turn table is changed
when sliding.
--- 70 ---
Factory
Inspection, repair or adjustment
standard
0.15/100 • Readjust squareness with the
(Dummy disc) Nylock Hex. Socket Set
(Fig. 77) Screw M8 x 16 [17].
When sliding (tip) • Replace Hinge (A) [173] or
0.25/100 Gear Case [275] or Turn
(Dummy disc) Table [26] or Base Ass'y [59]
(if deformed).
0.2/ φ 295 • Replace the TCT Saw Blade
(Dummy disc) [286].
• Check for surface defects on
Washer (A) [287] or Washer
(B) [285B] and repair with a
file as necessary.
• Replace Washers (A) [287] or
Washer (B) [285B].
0.15/100 • Loosen the Bolt (W/Washers)
(Fig. 78) M8 x 35 (Black) [50] and
adjust as necessary.
• Replace Fence (A) [96] and
Fence (B) [51].
0.15 or less • Loosen the Bolt (W/Washers)
(Fig. 79) M8 x 35 (Black) [50] and
adjust surface alignment of
Fence (A) [96] and Fence (B)
[51] as necessary.
• Replace Fence (A) [96] or
Fence (B) [51].
0.15/ φ 250 • Replace the Turn Table [26].
Same as a • Press-fit Slide Pipe (A) [149]
(Fig. 80) and Slide Pipe (B) [166] into
the Support [134]. Tighten
the Hex. Socket Set Screw
M8 x 10 [135] and check the
accuracy (maximum torsion
level 0.05/100). If it is not
accurate, replace Slide Pipe
(A) [149] and Slide Pipe (B)
[166] with new ones (Fig. 80).