Gradall 544D (9136-4003) Service Manual - Manual (Page 53)

Form No. 20220 z z z z z 544D-10 Owner/Operator Manual
BOOM 17.3
Stabilizers increase stability and load
capacity ONLY if they are used
properly. Using stabilizers without
regard to surface conditions could
cause handler to tip over and result
in serious injury or death. Always
ensure surface can support handler
and load.
Figure 17-3
CHECKING & ADJUSTING BOOM CHAINS
Boom is extended by a cylinder and a set of chains within the boom.
For more detailed information, including boom chain checks and
adjustments, see the appropriate Service Manual.
STABILIZER
Stabilizers are furnished as standard equipment on all 544D-10 Material
Handlers.
Use stabilizers to increase stability and/or load capacity and in leveling the
handler before picking or delivering a load. Study load charts carefully to
determine maximum load capacities for various lift situations, with and without
stabilizers.
Before using stabilizers to support handler/load on untested surface, perform
following procedure:
1. With handler positioned to pick or deliver load and with load on ground or
pick point, lower stabilizers enough to level handler and remove weight
from front wheels.
2. If required, position signal man to observe and report penetration of stabilizer
shoes in supporting surface.
3. With forks beneath load, slowly begin to raise load. Stop immediately if
signal man reports excessive or uneven shoe penetration. If shoe penetration
is acceptable, proceed with lift. If stopped by signal man, relieve load from
forks and proceed with steps 4 and 5.
4. With forks resting on ground, raise stabilizers from surface far enough to
install sufficient blocking to overcome excessive or uneven shoe penetration.
5. Repeat steps 3 and 4 until excessive or uneven penetration has been
overcome before lifting load.
Transport machine with stabilizers in the “up” position as shown in
Figure 17-3.
WARNING !