Rice Lake Combination System - Precision Loads On-Board Weighing Systems - Manual (Page 65)

Appendix 61
6.3.3 Inspection
All welds must have sufficient penetration to ensure the strength and safety of the installation. The final size of the
triple-pass fillets must not be less than 1/2 inch. No undercut is permitted on either the bearing plate leg of the weld
or on the angle bracket surface leg of the weld. Repair any undercut with additional fillet or by means of a contour
using a grinder to remove the notch. All weld stops and starts must be visually inspected. Fill any weld craters.
Visually inspect the angle bracket for any evidence of warpage or distortion. Weld-induced stresses can adversely
affect load cell performance.
2 1/2 x 1/2
Weld 8 PL
Figure 6-2. Weld Example of Single Piece Bearing Plate
6.3.4 Bolt Torque Verification
After welds have thoroughly cooled, all load cell mounting bolts must be checked for proper torque values. Refer
to the “Bolt Torque Values” on page 58 and on the label provided with the scale system.
In some cases it is acceptable to weld bearing plates directly to outboard substructures and to utilize full-length
welds on load cell bearing plates. These applications require bearing plates to be welded from underneath, thus the
installer must pay special attention to weld quality and the potential for warpage from overheating.
Plug welds are commonly used when mounting body angles to subframes or subframe fishplate. When welding
angles to the body subframe, avoid 90-degree welds, as these can become a source for subframe cracking.
Always weld the underside of the body angle to the body subframe for the entire length of the angle. In other areas
of the angle, weld continuously for 6 inches every 12 inches of angle. Never use angle which is less than 1/2 inch
thick.
Figure 6-3. Example of Plug Weld
6.4 Transmitter Installation and Cabling
When installing PL9700 series transmitters and cabling on trucks and trailers, observe the following procedures.
Figure 6-4. Four Lead Transmitter