Rice Lake TradeRoute HL Series - Low Profile Installation and Setup for Models from 2011 and Older 128406 - Manual (Page 9)

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7. Truck Preparation
Before you mount your On-Board Weighing System onto your truck, make sure there
are no protrusions or mechanical parts on the truck that may interfere with the scale
operation. Remove any parts that protrude above the C-channel of the truck frame.
7.1 Fenders
Fenders are required over the rear wheels of the truck. This prevents mud/dirt to
accumulate on the scale that can cause erroneous weight indications. The truck fenders
must be mounted on the truck frame, NOT ON THE CONTAINER BODY. Allow for a
minimum 3" clearance between the fenders and any part of the scale.
8. Scale Positioning
The scale must be positioned correctly in relation to the container’s center of gravity to
ensure proper distribution of weight to the load cells. The following diagrams outline
the proper scale positioning for three point and four point scales. For three point
systems, Rice Lake Weighing Systems recommends positioning the single cell in the rear
to avoid the truck’s driveshaft. There is no front or back to the modules, they can be
attached either direction. Some factors to consider when positioning the modules are:
1. Accessibility for service.
2. Space for attachment of test weights to the lift plates of the scale system.
3. Avoidance of bolt heads on the truck frame.
4. Avoidance of other protruding components on the truck frame.
5. Ease of hydraulic plumbing and wire routing.
It is important to position the scale far enough away from axles and tires such that
weight hangars and test weights can be attached to the lift plates for balancing,
calibration, and approval. The test weights, when attached to the scale, must clear all
obstructions at all operative angles (6 degrees in all directions). See the following figures
for details.