TITLE
SECTION
SUPERCEDES
DATE
520606
H200
3-30-99A
6-18-03B
MOUNTING INSTR.
VC 520 / 620 (SUBFRAME)
MANUFACTURING, INC.
HOIST MOUNTING INSTRUCTIONS (VC 520 / 620 WITH SUBFRAME
ONLY)
Refer to drawing 520602 for VC 520 and 620104 for VC 620 (on the preceding pages).
A. Position the hoist into the front half of the subframe by inserting the two lower pivot angles into the lower pivot
tube on the scissors and then positioning that assembly inside the front half of the subframe. The two holes on
each lower pivot angle should match up with a set of holes on the subframe mounting brace. The front set of
holes on the subframe corresponds to a dump angle of 45 degrees, the middle to 47 degrees, and the rear to
50 degrees. See Dwg. 520607 for subframe features.
NOTE: If any dump angle other than 50 degrees is desired, an additional crossmember will be required to support
the rear knuckle of the scissors.
B. Fasten the lower pivot angles to the subframe using two (2) 1/2” x 1-1/2” hexhead cap screws, lockwashers, and
nuts, and four (4) flatwashers (both sides). See Dwg. 520608 Figure 4a.
C. Position the hoist with the subframe front section onto the truck frame.
NOTE: The front crossmember of the front section has only been tack welded into place. This was done to
provide you with the flexibility to move the front crossmember and power unit, if desired. When the
crossmember is where you want it, fully weld it into place.
D. Place the rear section of the subframe onto the truck frame.
NOTE: A distance of less than 38” should be maintained between the center of the rear hinge and the center
of the rear axle. If this distance exceeds 38”, additional reinforcement of the truck frame may be
necessary.
E. Trim off any truck frame that extends beyond the rear hinge.
F. Fasten the rear half of the subframe to the truck by welding the two frame tie down brackets onto the subframe,
drilling corresponding holes through the truck frame, and using two (2) 1/2” x 1-1/2” hexhead cap screws,
lockwashers, and nuts, and four (4) flatwashers (both sides). The tie down brackets should be located as close
as possible to the rear hinge to insure stability.
G. Fasten the two halves of the subframe together by welding the tabs extending from the rear half into the front half.
H. After the two halves are welded together, place the mounting angles under the lower pivot angles and against
the truck frame. Clamp them securely in place. Drill through the frame and install the mounting angle with two
(2) 1/2” x 1-1/2” hex head cap screws, lock washers, and hex nuts, and four (4) flatwashers (both sides).
See Figure 5.
NOTE: Do not weld the mounting angles to the truck frame. This may void the truck warranty.
I.
Weld each end of the lower pivot angle to its mounting angle as shown in Dwg. 520608 Figure 4b. Note the welding
symbols. Do not weld to the truck frame.
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