Dismantling The Weighing Cell; Removing The Coupling; Removing The 2 Flexure Holders; Removing The Coil - Precisa 321 Wartungsanleitung

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2.4

Dismantling the weighing cell

2.4.1

Removing the coupling

1. Unscrew the 2 screws (28), remove the coupling (3), its round bases (34) and spring washers
Group A:
(32) ( only the XR-bases (35)). Do not separate the screw components!
2. Screw the coupling anchor [13] tightly on with its 2 screws [14] in place of the coupling.
2.4.2

Removing the 2 flexure holders

1. Fix the upper flexure holder (5) into the chassis, using the 2 pins for flexure holders [6].
2. Unscrew the 4 screws (26) of the flexure holder and remove them together with its 4 spring
washers (32), 2 on the chassis, 2 on the support piece (
3. Remove the flexure holder together with the flexures which are still fixed on it, then remove the
pins from the holder.
4. Do so with the lower flexure holder, too.
2.4.3

Removing the coil

1. Unsolder the 2 connecting wires (13) carefully from the connection board (11) using the
tweezers.
2. Unscrew the 3 screws (25) from the magnet cover (16). Remove the cover together with the
transport safety device (17) and the spring washer (32).
3. Unscrew the 2 brass screws (23) from the coil (4) on the balance arm (2) using a No.2
screwdriver. Remove the coil carefully from the magnet pot, together with the washers (31).
2.4.4

Removing the support piece

1. Unscrew the 3 grub screws (29) of the inner cone (9) and remove it.
SCS only:
2. Remove the left (19) and the right (20) reference weight bearing.
3. Unscrew the upper screw (balance arm side) of the coupling anchor [13] and pull off the support
piece together with the coupling anchor over the assembly pins [9].
4. Untighten the lower screw of the coupling anchor for roughly 2 turns. The support piece and the
coupling anchor are loosely held together now.
Group A:
with its 4 XR-bases (35)).
Repairs
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