Gradall G6-42P (91404003_Before 0160004017) Operation Manual - Manual (Page 36)

WARNING !
• Always level forks
(horizontally) before swinging
load to side. Swinging
unleveled forks may result in
load slipping from forks.
• The swing mast attachment
has a smaller load capacity
than the standard carriage/
fork attachment. Study &
understand the swing mast
capacity chart before
handling a load with swing
mast.
• Read additional capacity
information under “Capacity”
heading.
• Because the swing mast
increases lift height and can
swing load to side; it is
especially important to level
handler before lifting a load
more than four feet above
ground level.
See Page 12.0
Truss Boom & Truss Boom with Winch
A side load or a swinging load could cause the handler to tip over and/
or damage the boom.
Observe the following Special Precautions:
• Never drag the load; lift vertically.
• Use tag line to guide and steady a suspended load. Tag lines must be long
enough to keep helpers clear of load and handler.
• Beware of wind. Wind can cause a suspended load to swing and cause
dangerous side loads - 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.
• Do not attempt to use handler frame-leveling to compensate for load swing.
Attachment Tilt Controls:
Figure 14-7
The carriage tilt cylinder is used to tilt the
truss boom up and down from the handler
boom head. The carriage tilt lever controls
truss boom tilt.
The auxiliary control lever is used when the truss boom is furnished with a
winch. Pull the lever back to raise winch load; push the lever forward to lower
winch load.
Installation Procedure:
1. Remove carriage/fork combination or other attachment from boom head.
See Page 14.1
2. Install truss boom on boom head.
3. If truss boom winch is furnished, connect auxiliary hydraulic hoses to winch.
Operation:
• Approach truss or truss bundle with boom above and parallel to load.
• Position truss boom approximately parallel with main boom.
• Position truss boom/winch hook as close as possible to balance point of load
and secure load to boom using short slings or other rigging. Be sure rigging
will not allow load to slip in any direction.
• Open clamps at heel of truss boom far enough to clear load and tilt truss
boom up until truss/bundle contacts heel of truss boom.
• Close clamps to hold load lightly and secure clamps.
• Transport load to delivery site and attach tag lines if load will be freely
suspended.
Swing Mast
Capacity:
Maximum lift capacity is shown on attachment serial number plate. However,
maximum lift capacity applies only to certain areas within boom extension/
elevation pattern of handler/swing mast combination. A separate capacity chart
must be used for handlers equipped with mast. Study and understand this chart
before attempting to handle a load with swing mast attachment.
14.6
WARNING !
Do not handle a load with Truss
Boom & Truss Boom with Winch
attachment until you study &
understand the “Truss Boom &
Truss Boom with Winch Capacity
Chart”. If your handler does not
have a “Truss Boom & Truss Boom
with Winch Capacity Chart,” ask
your supervisor to get one before
using the attachment.
AUXILIARY
CONTROL LEVER
LOWER
WINCH
LOAD
RAISE
WINCH
LOAD
PRECAUTIONS
WARNING !