1644526G (406807)
2020-SEP-21
6
1644526G (406807)
2020-SEP-21
7
LOCATE AND INSTALL REAR HINGE
On single-axle trucks, the rear hinge must be located as close as possible behind the rear spring hanger.
This will be 32 to 36 inches behind the center of the rear axle. On tandem axle trucks the center of the rear
hinge should be located 42 to 50 inches behind the center of the rear tandems. Mark the rear of the truck
frame for notching as shown in Figure 1. Notch the truck frame as marked. Make sure the rear hinge is
square with the truck frame and at the correct height. The top surface of the rear hinge bracket should be
flush with the top of the angle mounting brackets of the hoist frame as shown in Figure 1. Securely weld
the rear hinge to the truck frame. Cap the ends of the truck frame under the rear hinge. Weld the capping
plates to the ends of the truck frame and to the bottom side of the rear hinge angle.
On tandem-axle trucks, place the gussets in the corners formed by the truck frame rail and the rear hinge
frame angle. Raise the front end of the gusset so it touches the top flange of the truck frame rail. Be sure
that the gusset does not interfere with the rear hinge operation. Securely weld the gussets to the rear hinge,
the truck frame rail and the top flange of the truck frame rail.
LOCATE HOIST
Determine where to mount the hoist on the truck. Please refer to the chart in Fig. 4 for the relationship
between dump angle and “D” dimension. Measure forward from the center of the rear hinge pin and mark,
on the truck frame, the location of the front crosstube of the hoist frame. Place the hoist on the truck frame
and clamp the hoist pivot pads to the truck frame. The back end of the hoist must be supported by a cross-
member in the truck frame. The top of this crossmember may be up to 1” below the top of the truck frame.
The “CM” dimension shows the location for this crossmember. Make sure the hoist frame is centered on
and square with the truck frame.
If desired, the hoist can be turned end for end for a ‘Reverse’ mount. This does not affect the lifting capac
-
ity.
WARNING! LOCATING THE REAR HINGE FARTHER BACK THAN
RECOMMENDED MAY CAUSE UNDUE STRESS IN THE TRUCK FRAME,
AND MAY CAUSE INSTABILITY DURING THE LIFTING CYCLE!
96”
