Manitowoc National Crane NC1400H - Inner Wear Pad Calibration; Inner Side Pads

National Crane Published 10-30-2014 Control # 040-09 5-37
1400H OPERATOR AND SERVICE MANUAL SERVICE
INNER WEAR PAD CALIBRATION
INNER SIDE PADS
1. With a pair of inside/outside calipers, measure the inside
width of the outer section (W
i
) at the front and back of
the boom and record the smallest measurement. If the
section has cylinder anchor bars, take a measurement
directly in front of these bars.
2. With the inside/outside calipers, measure the outside
width of the inner section (W
o
) at each side pad location.
Record the largest measurement.
3. Measure the thickness of the wear pads and record
(t
wp
).
4. Subtract the largest outside width (W
o
) of the inner
section and the thickness of the two pads (t wp) from the
inside width of the outer section (W
i
). Add shims as
required [each shim is 0.03 in (0,8 mm) thick] to tighten
the pads so that there is 0.03 - 0.09 in (0,8 - 2,3 mm)
clearance between the widest part of the inner boom
and the most narrow part of the outer boom when shims
and pads are installed. In some cases it will be
necessary to have an unequal number of shims behind
the pads at the top and bottom side pad locations. See
example.
OUTSIDE
INSIDE
CALIPERS CALIPERS
CYLINDER
ANCHOR
BARS
OUTER SECTION
W
o
2 PLCS TOP
INNER SECTION
W
o
1 PLC BOTTOM
t
wp
t
wp
Reference Only