Lubrication; Product Precision - Hitachi C 12LSH Technical Data And Service Manual

(3) Reassembly of the ball bushing
The Ball Bushing [144], Holder (A) [145] and Hinge (A)
[173] are maintained at a smooth fit. When placing the
Ball Bushing [144] into Holder (A) [145] and Hinge (A)
[173] gently hammer it with a plastic hammer so that the
Ball Bushing [144] is seated into Holder (A) [145] and
Hinge (A) [173] in parallel. After reassembly, lubricate
around the steel balls inside the Ball Bushing [144] with
2 grams of Nippeco SEP 3A grease. Apply machine oil to
Slide Pipe (A) [149] and Slide Pipe (B) [166]. When
reassembling, put the Ball Bushing [144] inside Holder (A)
[145] and Hinge (A) [173] as indicated in (A) of Fig. 73.
Visual observation will do for this insertion. Layout in (A)
offers about 30% higher rated load in (B).

11-8. Lubrication

Advise the customer to lubricate the machine as indicated below at least once a month. Also, prior to applying
lubricant, any sawdust, dirt or other foreign matter should be thoroughly wiped away with a soft cloth.
(1) Swiveling section of the gear case
Coat machine oil on the swiveling and sliding portions of the Gear Case [275] and Hinge (A) [173].
(2) Vise section
Coat machine oil on the screw thread portion of the Knob Bolt M10 [39] of the Vise Ass'y [37].
(3) Holder (A)
Coat machine oil on the swiveling and sliding portions of Holder (A) [145] and the Holder Shaft [6].

11-9. Product Precision

On completion of reassembly, confirm precision tolerances.
Deflection of dummy disc
Squareness between base and fence (A) and fence (B)
Flatness of fence (A) and fence (B)
Squareness between dummy disc and fence (A) and fence (B)
Squareness between fence (A) and fence (B) and slide pipes
(Place a square against fences (see Fig. 71), slide the head and
check for any clearance between the dummy disc and the square.)
Squareness between dummy disc and turn table
Surface alignment of base and turn table
(Use the upper surface of the base as a reference.)
Item
Fig. 74
--- 57 ---
Fig. 73
Tolerance
0.2/ 295
0.1/50 (Height of fence)
0.15
0.15/100
0.15/180
0.15/100
0.2
+
--
0.2