adjusting bolt then tighten locknut. Check gap between
c.
Swing Brake Adjustment. To compensate for
thimble and side plate after adjusting (c above).
lining wear, back off locknut (fig. 3-25); tighten adjusting
nut just enough to get the proper feel on swing brake
NOTE
lever (fig. 2-24), then tighten locknut (fig. 3-25).
Levers should be parallel when brake
is released.
3-30. Boom Hoist Brake Adjustment
NOTE
a.
Before making any adjustment on boom hoist
A few drops of light engine oil on all
brake, assure that pawl is engaged in hoist drum ratchet
pins
and
trunnions,
before
gear to prevent boom from lowering.
adjustment, will allow smoother
b.
To adjust boom hoist brake, sufficient tension
operation.
must be placed on spring (fig. 3-26) to hold boom in
desired position. Position boom hoist lever in neutral.
e.
Engage boom hoist clutch by pulling boom
(With boom hoist lever in neutral brake is applied and
hoist lever toward operator just enough to take pressure
clutch is disengaged). Turn nut clockwise until brake
off pawl, then disengage pawl. Return boom hoist lever
band is tight, then tighten locknut.
to neutral, slowly, to assure that brake will hold boom.
Readjust if necessary. After adjustment is complete,
c.
Always check clearance between thimble and
engage boom hoist pawl, move boom hoist lever away
side plate. It should be at least 1/16 inch. Adjust this
from operator to release brake, then check levers for
clearance, when necessary, by backing off locknut then
position described in note in d above.
turning adjusting screw. When clearance is correct,
tighten locknut.
3-31. Crowd Chain Adjustment
d.
With brake applied, measure distances A
and B. Distance A should be from 3/8 inch to inch
a.
Loosen top adjusting nut (fig. 3-27) and
less than distance B. Make adjustment by turning
bottom adjusting nut on the two studs.
Figure 3-27. Crowd chain and anti-sway spring adjusting points.
3-36
