Vertical Flexure And Screws, Lock Plate, Washers, And Bushings, Removed - OHAUS PA64 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.3.16 Disassembling Analytical Load Cells
Top Bushing
Elongated hole
on bottom
8. Carefully loosen and remove the four screws that secure the Top Flexure Arm to the
Load Cell, and remove the Top Flexure Arm. (See Figure 3-62.) Place the Flexure
Arm on a flat surface. Note that the Flexure screws on the Analytical balances have
two washers each: a thicker silver-colored one on the bottom, and a smaller black
one on top.
Top Flexure Arm
Figure 3-62. Top Flexure Arm (Analytical).
9. Turn the Load Cell over and remove the four screws that secure the Bottom Flexure
Arm to the Load Cell, and remove the Bottom Flexure Arm. (See Figure 3-63.)
Place it on a flat surface.
When handling the Flexure Arms, be careful not to bend the Flexures.
10. Carefully examine each Flexure to see if it is bent. If uncertain, place the Flexure on
a clean flat surface and check that both sides rest evenly on the surface. If a Flexure
is bent even slightly, it must be replaced for the balance to operate properly.
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Figure 3-61. Vertical Flexure and screws,
Lock Plate, washers, and bushings, removed
from center of Hanger. Note the different-sized
screws and bushings for top and bottom.
Also note the elongated hole on the bottom
side of the Vertical Flexure.
NOTE:
Bottom Flexure Arm
Figure 3-63. Bottom Flexure Arm (Analytical).
3-24 Pioneer Balance Service Manual
Top Screw
Lock Plate
Bottom Screw