Service information
13
Install Load Cell
For Canadian HC models, overload stops should be loosened two full turns before installing new load cells. To
reset overload stops after load cell installation, place a weight equal to 25% of the load cell capacity on the affected
scale corner. Screw in the overload stop until the indicator reading changes. Then back off the overload stop 1/6
turn. Repeat for each corner where the load cell has been changed.
1. Set the new load cells near the corners where they are to be installed.
2. Thread the cable from each load cell through the conduit tubing in the frame to the junction box according
to the wiring diagram in Figure 4-2.
CELL 4
CELL 3
CELL 2
CELL 1
1
4
2 3
Note
Figure 4-2 shows both the scale and the junction box as viewed from the bottom. To verify correct
load cell/junction box terminal matching, see the numbers on the terminals inside the junction box
and the corner numbering diagram in Figure on page 14.
Figure 4-2. Bottom View of Scale (with Plastic Junction Box)
3. Check that the threaded holes for the load cell screws are free of debris, use compressed air to blow out
holes if necessary.
4. Position load cells with alignment arrows pointing up toward the deck and loosely install the hex head cap
screws provided, as shown in Figure 4-3.
Note
If the base is used with a pit frame or access ramp, position the load cell to maintain the dimension
shown in Figure 4-3.
5. With the torque wrench, tighten all bolts as follows:
•
2K- 10K - lb capacities: Torque to 75 ft-lbs.
•
20K-lb and 30K-lb capacities: Torque to 250 ft-lbs.
