Manitowoc National Crane 800D, Operator'S And Service Manual

Page: 174 / 256

SIDE SHIMMING OF BOOM SECTIONS 800D
7-2
Published 5-27-2018 Control # 039-06
TOP/REAR SIDE PAD ADJUSTMENT
With the inner boom section fully retracted, center the inner
boom in the outer boom by prying the inner boom section
from side to side.
Assemble the top/rear wear pads and plates. The top/rear
wear pads on this boom are adjustable to account for lateral
tolerances that occur during the manufacturing process of
the boom sections. The wear pad on each side at the
top/rear of the boom can be adjusted over a range of 3/16 in
(4.8 mm) by rotating, end for end, the wear pad and plate or
the wear pads and plate independently. This is possible
because the holes in these parts are offset from the center.
The holes are 0.06 in (1.6 mm) off center in the plate and
0.03 in (0.8 mm) off center in the wear pad.
Various combinations of rotation of these parts allow the
adjustment.
Once the boom is located, the wear pad and plate
combinations can be inserted into the space between the
boom sections and aligned over the holes in the sections. If
the holes in the plate are not centered over the holes in the
sections, the wear pads and plates have to be removed and
adjusted either towards or away from the side plate of the
next larger section until the holes will align. When properly
aligned the wear pad should be tight against the side plate of
the outer boom section.
Needs adjustment. The capscrews cannot be installed and
there is a gap between the wear pad and side plate of the
larger boom section.
Properly aligned and adjusted wear pad. The holes in the
cam plate are concentric with the threaded holes in the
smaller boom section and the wear pad is tight against the
side plate of the larger boom section.
When wear pads are properly aligned and adjusted, install
capscrew and torque to 110 ft-lb (149 N·m).
9403
Fo
r
Reference
Only