Hitachi C 12FSA Technical Data And Service Manual page 48

(3) Reassembly of the ball bushing
Ball Bushing [65] and Holder (A) [68] are maintained at a smooth fit. When placing the Ball Bushing [65] into
Holder (A) [68], gently hammer it with a plastic hammer so that the Ball Bushing [65] is seated into Holder (A)
[68] in parallel. After reassembly, tighten the Hex. Socket Set Screw M8 x 8 [66] to prevent disconnection of
the Ball Bushing [65]. Then lubricate around the steel balls inside the Ball Bushing [65] with 2 grams of BC 4
made by Nippon Koyu Corp. Apply machine oil to slide pipe (A) and slide pipe (B).
When reassembling, put the Ball
Bushing [65] inside Holder (A) [68] as
indicated in (A) of Fig. 74. Visual
observation will do for this insertion.
Layout in (A) offers about 30 % higher
rated load than in (B).
(4) Reassembly of the bushing
Refer to "9. Adjustment", "9-2. Looseness Adjustment
of the Slide Section".
When inserting slide pipe (A) into Holder (A) [68],
keep the four Bushings [73] out of contact with slide
pipe (A). At this time, apply grease to the contact area
between the Hex. Socket Set Screw M8 x 16 [71] and
Bushing [73] to prevent drop-off. After reassembly,
adjust the clearance at slide pipe (A) by tightening
Hex. Socket Hd. Set Screw M8 x 16 [71].
After adjustment, check the slide load [2 to 3 kg (4.4
to 6.6 lbs.)], the squareness [0.15 /100 mm (0.006"/
4")] between the saw blade and the Turn Table [9A],
the squareness [0.15/100 mm (0.006"/4")] between
the saw blade and the fence and the squareness
[0.15/180 mm (0.006"/7-3/32")] between Fence (B)
[21A] and the slide pipe.
Correct
Ball bushing
Steel balls
Slide pipe (B)
(A)
Fig. 74
Lock nut M8
Holder (A)
Adjust the clearance
after inserting the slide pipe
(A) (Hinge Ass'y [51]).
--- 44 ---
Incorrect
(B)
Hex. socket set
screw M8 x 16
Bushing
Slide pipe (A)
Fig. 75