TrafFix Scorpion II METRO TL-2 PLUS, Assembly Manual And Mounting Instruction Manual

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P/N 13089 Rev A1 Dated 5/13/2020 30
Dump Truck Mounting Installation
Installation of Extension Frame
Before attempting to install the TMA to a host vehicle truck, ensure that the truck meets the following criteria: Truck
weight specifications vary from state to state; however, it is recommended that the truck weighs a minimum of 7,300
lbs.
Adding ballast can affect the truck bed height, so it is recommended to ballast the truck before attaching the TMA.
Check the truck frame to ensure it is structurally sound and rust - free. Also, check the amount of frame extension in
back of the spring brackets – a minimum of 4” is needed. Verify that the bed of the truck does not extend beyond the
back of the frame more than 15”. This is necessary for vertical clearance of the TMA when in the stored position.
Ensure that the truck side gates are measured at a maximum height of 8’ 6” from the ground to allow clearance if a
Model C TMA is being used and is in the stored position.
1.The truck frame consists of two C - channels spaced
approximately 34” apart. Dump trucks often have a ½”
thick plate welded across the back of the frame. A plate
must first be installed before the extension frame can be
mounted if a plate is not present. Grind the inside and out-
side edges of the frame, as shown in this figure (right), to
prepare for a weld. Verify that the frame is square from
side to side, using a carpenter’s square tool or any other
square device. Also measure the distance from the frame
ends to the back of the spring brackets.
2. A backing plate (33” x 10”) should be centered on
the back of the truck frame. Note where the frame
will be welded to the plate and grind the plate in this
location. Tack weld the rear plate into position and
make sure that the rear plate is positioned vertically
at 90° to horizontal. Continue by welding the inside of
the frame end to the plate.
Figure 1
10”
10”