Rice Lake Combination System - Precision Loads On-Board Weighing Systems - Manual (Page 36)

Note
Note
Note
32 Precision Loads On-Board Weighing Installation & Service Manual
Do not tighten the end bolts of the load cell at this point. These bolts only need to be hand-tight.
6. Mount the load cell assemblies to the base plate in the approximate position desired.
Make sure load cell output cables face INWARDS for all 5th wheel installations. A pass-through hole may be
drilled in the base plate to allow load cell cables to pass to the underside of the plate or inside of the chassis
rails. Use split loom, split fuel line or spiral wrap to protect the cables. Cables must not be allowed to contact
any sharp edges.
7. With assembled load cells in position, use an overhead lift to carefully lower the 5th wheel plate onto the
two load cell trunnions. Pin the 5th wheel plate into the trunnions.
8. Use an accurate tape measure or calipers to position the 5th wheel load cell assemblies so the 5th wheel is
accurately centered (+/- 1/16" on each side and at front and rear).
9. When the complete assembly is centered and aligned correctly, tack weld the bearing plates in place.
10. After tacking all four bearing plates, unbolt the four load cell end bolts (2 bolts per load cell) and carefully
elevate the 5th wheel plate and load cells off the bearing plates, and away from the welding area.
11. Clean the tack welds and area of the base plate around the load cell bearing plates.
12. Perform final welds on all bearing plates per welding guidelines in “Welding Specifications” on page 59.
13. Let welds cool.
14. Remount load cells and 5th wheel plate to the cooled bearing plates. Install the load cell end bolts and
washers using a thread locking compound and torque to specification.
15. Apply paint or underbody coating to all bare metal surfaces such as the load cell bearing plates and
trunnions.
16. Bolt torques: After one or two weeks of use, re-check all bolt torque values.
Rice Lake Weighing Systems supplies poly bushings for all 5th wheel trunnions and recommends these be
used for replacement parts as well.
Additional shear protection may be added to the bearing plate mounts if desired. When adding additional
shear plate, plate must be ground to fit against original bearing plate welds. Avoid weld spatter onto the top of the bearing
plate. Any spatter on this top surface must be removed before mounting of the load cells.
Pole Trailers. In some cases, 5th wheel mounts such as pole trailers and end dump trailers must use heady duty coil
springs at the front and rear positions of the 5th wheel plate to keep the plate from riding on the ends of the load cells.
Contact Rice Lake Weighing Systems for information on the use of these coils. See Section 6.8 on page 69.
Quick Change Applications. Rice Lake Weighing Systems manufactures quick change trunnion straps for fitting Holland or
Simplex 5th wheels to our PL9000-26 Load Cells. The Holland Quick Change assembly fits all Holland standard capacity
2000, 3500 and 3600 series 5th wheel plates and the Simplex assembly fits standard capacity Simplex 5th wheel plates.
Contact Rice Lake Weighing Systems for details, part numbers and fitting instructions.
4.6 Hinge and Hoist Pivot Pin Installation
Pivot load pins supplied are custom sized to fit the specific hinge and ram bracketry of the vehicle. The process of
installation requires removal of existing pins, and replacements of these pins with load pins and collars.