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identify the point of equal distance, front to rear. Make a mark on the container or on the trailer
locating the point of equal distance. This will become the pivot point for the arms. Remove the
container from the trailer, making certain the pivot point is clearly marked on the trailer or on the
hoist itself.
C. The vertical height of the MOUNTING BRACKET ASSEMBLIES is determined by placing
a straight edge across the hoist rails and measuring down to the center of the trailer frame.
Tack weld the CHASSIS MOUNTING TUBES in place making sure they are plumb and square
to the hoist. A good "Rule of Thumb" to use for setting these heights is to mount them in the
middle of the chassis. This allows you room to put gussets above or below for strength. Using
the straightedge, measure down from the straightedge the distance measured above. Mark the
CHASSIS MOUNTING TUBES and cut. Install the chassis mounting tubes back in the same
place on the truck, after cutting, making sure they are plumb and square. Place a MOUNTING
BRACKET ASSEMBLY on top of these tubes and align the center of the PIVOT PIN (grease
fitting) with the pivot point mark determined above. Measure from the hoist to the MOUNTING
BRACKET at the front and rear to make certain it is parallel to the hoist. Plumb the bracket
vertically and tack weld in place.
Check to make sure the BASE ARM/GEAR ASSEMBLY is straight and parallel to the hoist. If
not, correct by moving the MOUNTING BRACKET ASSEMBLY in or out as necessary.
NOTE: There is a small amount of in and out movement built into the RACK 'N PINION
assembly.
Repeat for other side.
NOTE: A GOOD WAY TO MAKE CERTAIN THAT BOTH PIVOT POINTS ARE IN
THE SAME PLACE ON BOTH SIDES OF THE TRUCK IS TO MEASURE ON A
DIAGONAL FROM THE ROLL BASE/REST TO THE ARM PIVOT PIN.
Measure across the trailer to make certain you are no wider than 108" from grease fitting to
grease fitting. Correct as necessary.
Add Gussets between the CHASSIS MOUNTING TUBES and the "fish plates" in front to rear
as well as up and down locations to strengthen the mounting. Weld everything securely.
SOME POINTS TO REMEMBER ARE:
-DO NOT WELD DIRECTLY TO THE CHASSIS, USE "FISH PLATES" THAT ARE
DRILLED AND BOLTED TO THE CHASSIS. Follow the chassis manufacturers
recommendations. Do Not use any hardware below a grade 8.
-Make sure the structure is well supported and gusseted.
-There cannot be any flexing of the supports that hold the MOUNTING BRACKET
ASSEMBLIES. This must be as rigid as possible.
The MOUNTING BRACKET ASSEMBLIES must be:
-PLUMB (vertically) and level (horizontally).
-Parallel to the chassis.
-Must be the same distance out from the chassis on both sides of the truck.
3. INSTALLING THE ARMS and STABILIZER BAR
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