Gradall 534D-10 Service Manual - Manual (Page 28)

“Leveling” means positioning the handler so that it is level from side to side
(left to right).
A level indicator is located in the upper right corner of front window frame to
permit operator to determine whether handler frame level. (See Figure 3-1)
There are four very important things to remember about handler leveling:
1. Never engage a load or lift a load more than four feet (1.2m) above
ground unless handler is level.
2. A handler with the boom raised and/or an attachment installed is a partially-
loaded handler.
3. Once the handler frame is level and the handler has raised a load more
than four feet (1.2m) above ground, it must not be moved from this position
if such movement could change the level condition. Do not use sway to
level handler with load more than four feet (1.2m) above ground.
4. The combination of side tilt and load can cause the handler to tip over.
Two ways to level the handler:
The surface which will support the handler can be leveled. This method must be
chosen if it will be necessary to move the handler from its position after the
load has been raised over four feet (1.2m) from ground AND such movement
could change the level condition.
Remember: The supporting surface must be large enough, smooth enough
and firm enough to keep the handler level when it is moved from its position.
The handler may be leveled by means of the frame-leveling system. This method
may be chosen when it will not be necessary to move the handler from its position
after the load has been raised above four feet (1.2m) from ground - OR - when
such movement will not change the level condition of the handler.
Always determine best position for handler to raise load from its present location
and also to position load at its destination. THEN determine which method of
leveling will be required at each location.
FINALLY, consider terrain between present location of load and its destination.
Never attempt to transport a load across terrain which could cause handler to
tip over.
Leveling Handler Frame:
The handler is designed to permit tilting main frame 8° to left or right to
compensate for uneven ground conditions.
The rear axle pivots at the midpoint of the main frame to help ensure that all
wheels will remain in contact with the ground.
A hydraulic cylinder provides a rigid connection between front axle and main
frame to help ensure a solid work platform and to tilt main frame to left or
right.
Optional rear-axle stabilization is available for Material Handlers covered by
this manual. This system includes a hydraulic cylinder attached between the
frame and the rear axle, as well as flow-restricting valving. This system dampens
rear-axle oscillation whenever the boom is raised over 45° from level. However,
the system never locks the rear axle and is not designed to increase
lateral stability.
LEVELING THE HANDLER 11.0
Raising the boom (loaded or
unloaded) when handler is leaning
to one side could cause machine
to tip over with little or no warning
and cause serious injury or death.
WARNING !
Always move boom to carry
position (horizontal or below)
before leveling frame. Attempting
to level machine with boom raised
could cause it to tip over.
WARNING !