4-12 SCALE INSTALLATION.
This task covers:
General Mechanics Tool Box, Item 1, Section
Cover removed from Recovery / Recharger Unit;
III, Appendix B.
Air supply disconnected, paragraph 2-7
New Recovery / Recharger Unit
4-12.1 Assembly. (Refer to Figure 4-4)
Every scale is a relatively delicate, precision mechanism which gives best results when
handled with care.
A new scale will be shipped with the column unattached. The initial replacement steps
involve scale assembly. Each Bench Dial Scale is packed in two separate boxes, one
for the dial head mechanism and the other for the base mechanism. Open the box
containing the dial head mechanism and carefully remove the contents.
As shown in Figure 4-4.a, remove two screws (1), washers (2) and shipping bracket (3)at the low end of the
column assembly. Discard the bracket but retain the two fastening bolts
Open the box containing the base and lever mechanism and carefully remove the contents.
Lift the platform off the base and set it aside.
Turn the base assembly upside down and loosen the locking nut (6)on each of the four adjustable feet.
As shown in Figure 4-4,b place the dial head mechanism and base assembly on their sides. Be sure that the dial
chart is facing the lever mechanism.
Line up the holes in the bottom of the column assembly with the corresponding holes in the base assembly.
As shown in Figure 4-4,c insert two washers (2) and screws (1) (from para a) through the bottom of the base
assembly and into the column assembly. Tighten screws as much as possible.
Using a set of pliers, grasp the end of the steelyard assembly (4) but use caution not to scratch or damage the V
bearing hook. Hook the V" bearing hook under the tooled steel pivot (5) as shown in Figure 4-4.d