Manitowoc Engineering Co.
ADJUST~E_ NT (FIGURE 2)
The automatic boom stop assembly was set
and sealed at the factory and it should not
require periodic adjustment.
The assembly does require adjustment when
parts are replaced or when the assembly is
installed in the field.
1. Travel the machine onto a firm level
surface or level the machine by block-
ing below the crawlers or the out-
riggers.
2. Check the machine hook rollers for pro-
per adjustment.
3. Lower the boom so the boom butt or the
telescopic boom stop tube is off the
control rod (rod fully extended):
a) Loosen jam nut (i) and adjust nut
(2) until spring (3) is compressed
to 3 inches. Securely tighten jam
nut (i) against nut (2).
b) Loosen the nuts on clamp (4) and
rslide the "quick-as-a-wink" valve
forward or back until there is I/8
inch clearance between the rod end
and the mounting bracket. Hold the
1/8 inch clearance and securely
tighten the nuts on clamp (4).
4. Lift a load which is at least 50 percent
of the maximum capacity chart load for
the boom length being used.
5. Slowly raise the boom to Dimension A
for the corresponding maximum boom
angle and boom length as specified in
in the appropriate table in Figure 4.
The boom must stop at the specified
dimension. If not:
a) Run jam nut (5) all the way onto
the control rod.
b) Thread the control all the way into
coupling (6).
c) Boom up or down until the boom is at
the specified radius.
d) Turn the control rod out against the
boom butt or the telescopic boom
stop tube until the rod end just
touches the mounting bracket.
e) Boom down and then back up to check
that the boom stops at the specified
Dimension A. If not, readjust the
control rod as required.
f) Hold the control rod and tighten jam
nut (5) against coupling (6).
(Cont'd,)
FOLIO
828-2 2-II-81
395143
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