User's Manual

Chapter 4: Maintenance and Troubleshooting
Parts Replacement and Adjustments
(12/00) 4-5
Load Cell Replacement
1. Remove power by removing the six “D” size batteries from the rear battery
compartment and/or disconnecting the AC power adapter.
2. Remove the four screws securing the front and back halves of the cover.
3. Disconnect the keyboard tail from the Controller PCB and set the front cover aside.
4. Disconnect the load cell wiring from the J4 terminal strip on the Controller PCB.
5. Loosen the grip bushing on the side of the enclosure enough to slide the load cell
cable out.
6. Remove the stainless steel platform from the base.
7. Loosen and remove the top load cell mounting bolts that secure the top frame to the
load cell.
8. Set the top frame and the load cell spacer aside.
9. Turn the WILDCAT scale on its side to access the bottom load cell bolts.
10. Loosen and remove the bottom load cell mounting bolts.
11. Remove the load cell from the base and pull the excess cable out through the
bottom of the column.
12. Reinstall a new load cell by following the steps above in reverse order.
Note - Lubricate the threads and under the head of the load cell mounting bolts before
reinstalling.
13. Using a torque wrench, tighten the load cell mounting bolts to the specifications
shown in Table 4-2.
14. After replacing a load cell, the overload stops must be checked and adjusted (if
needed). Refer to the next section for the overload stop adjustment procedure.
15. Thread the load cell cable through the column from the bottom.
16. Insert the load cell cable through the grip bushing on the side of the enclosure.
17. Connect load cell cable to the J4 terminal strip on the Controller PCB (Figure 2-2).
18. Tighten the grip bushing on the side of the enclosure to secure the load cell cable.
19. Connect the keyboard of the front cover to J5 of the Controller PCB.
20. Secure the front cover to the back cover with the four screws.
21. Coil the excess load cell cable and insert it into the column. A small length of tape
applied to the ends of the coils allows the cable to slide into the column easier.
22. Apply power to the scale. Press and hold the ON/OFF (PRINT) key for 3 seconds.
23. Recalibrate and test the operation of the new load cell.
MODEL METRIC ENGLISH
WS30R/WS30VR 20 N•m 15 ft•lbs
WS60R/WS60VR 20 N•m 15 ft•lbs
WS60LR/WS60LVR 20 N•m 15 ft•lbs
WS150R/WS150VR 30 N•m 22 ft•lbs
WW250VR 40 N•m 30 ft•lbs
WW500VR 80 N•m 55 ft•lbs
Table 4-2