JLG G6-42A Operator Manual - Manual (Page 42)

Truss Boom & Truss Boom with Winch
Capacity:
Maximum capacity for the truss boom (with or without winch) is shown on
attachment serial number plate. However, maximum lift capacity applies only
to certain areas within boom extension/elevation pattern of handler/truss
boom combination. A separate capacity chart must be used for handlers
equipped with truss boom. Study and understand this chart before attempting
to handle a load with truss 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 13-7
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 13.1.
2. Install truss boom on boom head.
Operation:
• If truss boom winch is furnished, connect auxiliary hydraulic hoses to winch.
• 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.
13.6
WARNING !
PRECAUTIONS
• Because the truss boom
extends the reach of the
handler, maximum load
capacity is reduced.
• Because of extended reach, it
is especially important to level
the handler before lifting a
load. See page 11.0.
• Travel with load and boom
lowered to travel position
1.2m (4 feet) or less above
ground.
• Always lower load to rest
before leaving handler.
WARNING !
WARNING !
Do not handle a load with Truss
Boom & Truss Boom with Winch
attachment until you study and
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
A side load or a swinging
load could cause the
handler to tip over and/or
damage the boom.