Manitowoc GROVE RT890E Operator's Manual page 55

RT890E
fully extended position are used to mark the boundaries of
the lifting areas.
A boom extension capacity chart and notes are included to
list the capacities for the extension length, load radius, and
boom angle.
Another section contains the notes for lifting capacities. Be
sure to read and understand all the notes concerning lifting
capacities.
The load chart also gives weight reductions for Grove load
handling devices such as hook blocks, headache balls,
b o o m e x t e n s i o n s , e t c . , w h i c h m u s t b e t a k e n i n t o
consideration as part of the load. Remember, the weight of
any other load handling devices such as chains, slings, or
spreader bars must be added to the weight of the load.
Crane Functions
Setting the Outriggers
1. Position the outrigger floats directly out from each
outrigger to where the outriggers will be properly
extended
CAUTION
Always depress one of the outrigger/selector switches
before positioning the outrigger extension/retraction
switch to extend or retract. Failure to do this may cause a
hydraulic lock against the individual solenoid valves,
preventing them from opening.
2. Depress the desired EXTENSION rocker switch on the
OUTRIGGER SELECTOR panel and hold the outrigger
EXTENSION/RETRACTION rocker switch to EXTEND.
The appropriate outrigger beam should begin to extend.
Refer to Engaging the Mid-Extend Lock Pin if the crane
is to be operated with the outriggers at the at the mid-
extend position.
WARNING
All four outrigger beams must be equally extended to the
mid position vertical stripe or fully extended or retracted
position before beginning operation.
NOTE: More than one outrigger at a time may be
extended. However, to ensure that each outrigger
is fully extended, repeat step 2 for each outrigger
after a multi-outrigger extension.
OPERATING CONTROLS AND PROCEDURES
3. After all four outrigger beams have been fully extended,
position the appropriate STABILIZER rocker switch on
the OUTRIGGER SELECTOR panel and hold the
outrigger EXTENSION/RETRACTION rocker switch to
EXTEND.
4. Extend each stabilizer, positioning the float as
necessary, until the locking levers of the float engage the
stabilizer cylinder rod.
NOTE: More than one stabilizer may be extended at one
time.
5. With each stabilizer float firmly touching the ground,
extend the front stabilizers approximately 8 to 10 cm (3
to 4 inches).
6. Extend the rear stabilizers approximately 8 to 10 cm (3
to 4 inches).
CAUTION
All four outrigger beam lock pins must be engaged before
operating from the mid-extend position.
CAUTION
The operator must select the proper load chart and LMI
program for the outrigger position selected.
CAUTION
The cab must be level when driving machine.
NOTE: Cab must be in the lowered position while leveling
machine.
7. Repeat steps 5 and 6 until all wheels are clear of the
ground and the crane is level as indicated by the sight
level bubble located on the right side of the cab. If it is
suspected that the bubble level indicator is out of
adjustment, verify and adjust the bubble level as follows:
a. Locate the crane on a firm, level surface.
b. Extend and set the outriggers. Level the crane, as
indicated by the bubble level indicator, using the
outriggers.
c. Place a miracle pointer level, carpenter level, or
similar type device on a machined surface such as
the turntable bearing or bearing mounting surfaces.
d. Using the outriggers, level the crane as indicated on
the leveling device used in step c.
e. Using the bubble level indicator mounting screws,
adjust the bubble level indicator to show level.
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