Gradall 544B Operation Manual - Manual (Page 30)

Controls: Capacity:
Maximum lift capacity for the truss boom (with or
without winch) is shown on serial number plate
(located on right cab wall). However, maximum lift
capacity applies only to certain areas within boom
extension/elevation pattern of handler/truss boom
combination. Refer to standard capacity chart. Study
this chart carefully before attempting to handle a
load with truss boom.
The auxiliary control lever is used to control the
winch. Pull the lever to rear to raise winch load and
push the lever forward to lower winch load.
Procedure:
Remove carriage/fork combination or other
attachment.
Install winch on boom head and connect hydraulic
hoses at winch motor.
Position winch hook directly above balance point
of load and secure using appropriate rigging.
Attach tag lines to load as appropriate and trans-
port load to delivery site.
While helpers guide load with tag lines, position
load at delivery point.
TRUSS BOOM & TRUSS BOOM WITH WINCH
PRECAUTIONS
Because the truss boom extends the
reach of the handler, maximum load
capacity is reduced (refer to next heading
- Capacity).
Because of extended reach, it is espe-
cially important to level the handler before
lifting a load more than four feet above
ground level (refer to page 19).
Travel with load and boom lowered to
travel position (load approximately one
foot above ground).
Always lower load to rest before leaving
handler.
If your unit is equipped with a multi-function
auxiliary control lever, refer to page 30.
A side load or a swinging load can cause the
handler to tip over and/or damage the
boom.
Observe the following Special Precautions:
SPECIAL PRECAUTIONS
Never drag the load; lift vertically.
Use tag lines to guide and steady a
suspended load whenever possible. Tag
lines must be long enough to keep
helpers clear of load.
Beware of wind; wind can cause a
suspended load to swing and cause
dangerous side loading - even with tag
lines.
Start, travel, turn and stop slowly to
prevent load from swinging.
Weight of all rigging (slings, etc.) must be
included as part of load.
Controls:
The carriage tilt cylinder is used to tilt the truss boom
up and down from the handler boom head. The
carriage tilt lever control struss boom tilt.
if your unit is equipped with a multi-function
auxiliary control lever, refer to page 30.
The auxiliary control lever is used when the truss
boom is furnished with a winch. Pull the lever to rear
to raise winch load and push the lever forward to
lower winch load.
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