Rice Lake Combination System - Precision Loads On-Board Weighing Systems - Manual (Page 23)

Applications 19
Spacing
For the PL9000-14, PL9000-14.4, and PL9000-16 models, spacing between load cell centerlines should typically
be in the approximate range of 100 inches (254 cm). For the PL9000-22 and PL9000-26 load cells, spacing
between load cell centerlines should not exceed 144 inches (365 cm). These are general guidelines only. Body
subframe strength should determine load cell spacing and the amount of subframe reinforcing required. The
installer must make these determinations. See Section 4.2.3 on page 22 for reference.
Body Angles
Bracket material used is typically 6" x 4" x 1/2" thick angle, with the 6" flange mounted to the chassis or body
runner. Do not use material that is less than 1/2" thick. Angle bracket length is a minimum of 16" for the
PL9000-14.4 load cell, and 15" for the PL9000-14 cell shown in Figure 4-12 but for weaker body subframes,
longer angles (up to 35" long) as well as other reinforcing techniques may be considered.
Figure 4-12. Body Angle Bracket for the PL9000-14 Load Cell
Body Spring Mounts
For 4-point underbody installations, the front two load cells are mounted with coil springs. For 6-point
installations, the front four cells are mounted with coil springs. Coil springs have an uncompressed height of 3
inches for both the 3/4" springs and for the 1" body coil springs. When mounting the coils, compress the springs
using the bolts supplied by 1/4 to 3/8 inch. The installer must also be aware of thread depth of the bolts used to
mount springs. When using 1/2" angle, and the tabbed washer plate supplied, compressing each coil by 1/4" to 3/8"
allows for the 1"-14UNF x 4.50" bolts of the PL9000-14.4 assembly to thread 1.125 inch into the load cell bolt
holes. See Figure 4-15. For the PL9000-14 load cell assembly (Figure 4-14) compressing the 3/4" coil by 3/8"
allows for the 3/4" PL9000-16UNF x 4.00"L bolts to thread 0.75" into the load cell.
Figure 4-13. PL9000-14 Load Cell Coil Spring Mount Assembly