SECTION IV
MACHINE RIGGING
2. The boom must be raised from a horizontal position.
NOTE
Support the boom in this position with the blocking used
A tension should be induced into the rope by provid-
during assembly.
ing some means of braking the wire rope. A tight
3. Erect the crane boom, being careful to take up slack in
winding IS imperative.
the load lines as the boom goes up to prevent any possibil-
ity of fouling lines.
CRANE BOOM. To remove the crane boom, proceed as
follows:
LOWERING THE CRANE BOOM. To lower the crane at-
tachment, move the boom hoist lever forward and slowly
lower the boom onto blocking.
If the machine is equipped with a fairlead,
swing it out of the way to fully lower the boom.
See FAIRLEAD and LAGGING Manual.
The load hoist lines must have adequate slack
when lowering the crane attachment to pre-
1. Disconnect any electrical cables that are attached to the
vent any possibility of these lines becoming
boom. Coil the cables and securely fasten them to the
taut. These lines will tend to tighten as the at-
machine cab.
tachment is lowered, and if adequate slack is
2. Relax the boom suspension and connect the guy lines at
not allowed, the attachment cannot be
the first insert adjacent to the tip section. Remove the extra
lowered completely. Damage to the attach-
guy lines from the boom point.
ment may also result.
3. Engage the boom hoist and lift the boom just enough to
DISMANTLING
remove the bottom connecting pins from the tip and insert.
CRANE ATTACHMENT
The size of this machine is such that some major assem-
blies may have to be removed before it is moved over the
Do not stand under the boom or inside the
highway from one job site to another. It is assumed that an
boom structure when removing pins. The boom
assisting crane is not available and all procedures are
could fall if improperly supported and could
written on this basis.
cause serious injury.
Dismantling is basically the reverse of erection. The ma-
4. Lower the attachment allowing the boom to hinge about
chine must be dismantled in the following order:
the top connecting pins. Provide blocking under the tip
section and insert. Remove the top connecting pins.
1. Unreeve the load hoist lines.
NOTE
2. Remove the boom.
Engage the boom hoist and raise the attachment.
3. Remove the counterweights.
Slowly swing the attachment to either side of the tip
4. Preparation for travel.
section, and lower the attachment on blocking. This is
done at this time because the tip section will have to
NOTE
be added to the boom base for counterweight and, if
If the machine requires that the crawlers be retracted
necessary, side frame removal.
in preparation for travel or loading, see Extending and
Retracting the Crawlers in Section Il.
5. Relax the boom suspension and connect the guy lines at
the boom base. Remove the extra guy lines
UNREEVING
6. Engage the boom hoist and lift the boom just enough to
remove the bottom connecting pins.
Keep hands and clothing clear of rotating
drums.
Do not stand under the boom or inside the
Carefully lower the boom to a horizontal position and install
boom structure when removing pins. The boom
suitable cribbing under each section of the boom. Lower the
could fall if improperly supported and could
boom onto the cribbing. Disconnect the hoist lines at the
cause serious injury.
dead end and unreeve the hook block and boom point.
Slowly wind the rope onto the drum by moving the appro-
7. Lower the attachment allowing the boom to hinge about
priate drum lever to the raise position. A lead or brass
the top connecting pins. Provide blocking under the inserts.
hammer may be useful in tapping the rope over as it is being
Remove the top connecting pins.
wound on the drum. Do not use a steel hammer or pinch
8. Do not remove the boom base.
bar. These can readily cause damage to the rope. After the
boom hoist line has been unreeved from the boom point,
9. When all inserts, except the boom base, have been
wind the hoist line onto the respective drum.
removed, attach the upper spreader to the boom base.
