Rice Lake Combination System - Precision Loads On-Board Weighing Systems - Manual (Page 22)

18 Precision Loads On-Board Weighing Installation & Service Manual
Chassis Bracket
Steel angle typically used is 6" x 4" x 1/2" thick. Chassis angle length for the PL9000-14.4 load cell is 8.50 inches
(216 mm). Refer to appendices for dimensions of brackets for other load cell models. Never use material which is
less than half an inch thick. The 6" flange is bolted to the truck chassis. Drill bolt holes in steel angle to diameter
specified for load cell mounting bolts. Do not punch holes. Brackets should be mounted to the truck chassis using a
minimum of four each 3/4” Grade 8 bolts per bracket. These bolts, washers and locknuts are not supplied. Rice
Lake Weighing Systems recommends utilizing as many pre-existing chassis bolt holes as is possible for mounting
chassis brackets, to minimize drilling into existing chassis rails.
Figure 4-11. Chassis Bracket
Gussets
For the 6 x 4 angle, gusset sizes are typically 5" x 3" x 1/2" thick flat bar. Trim 90 degree corner off each gusset to
fit inside the dimensions of the angle. Weld both sides of the gusset in place. Trim any protruding ends. For body
brackets, position 2 gussets in the angle to support each end of each load cell bearing plate (total four gussets). For
chassis brackets, position 3 gussets per bracket. Allow adequate clearance for load cell and chassis bolt heads and
sockets, and always ensure access to all bolts for inspection and torque maintenance.
Note
In some cases, the vertical wall of the body runner does not perfectly align with the vertical wall of the truck
chassis. The installer must adapt the horizontal flanges of the body or chassis brackets and the position of the
load cell placement on these flanges to compensate for any vertical alignment differences. For example, use
4" or 6" flange sizes as appropriate.
4.2.2 Underbody Mounting of Load Cells
Positioning
Establish locations for positioning of body and chassis angles. For packer bodies, the rearmost load cells should be
positioned as far rearwards as possible. Allow enough room for welding to the end of the body bracket. Positions of
brackets must take into account locations of fuel tank, battery box, toolbox, spring hangers, proximity to tires and
fenders, etc. Contouring of brackets is usually preferable to relocation of these items.