Manitowoc NATIONAL CRANE 900A - STABILITY CHECK

10-16
  +,
The chassis weight, before the crane is mounted, is
intended for use only as a guideline in determining the
total weight required for the unit to be stable with an 85%
tipping factor (i.e. when lifting capacity load, the unit is
at 85% of tipping or less).
In order to ensure the stability of the unit with an
85% tipping factor, a live load stability test must be per-
formed on each completed unit. Proceed as follows:
1. Test the unit for stability on a firm level surface.
2. A Series 900A crane requires RSOD stabilizers
for stability. With the boom stowed, set the unit
up level on the outriggers and stabilizers.
3. When stability testing this unit, select the load at
the specified boom extension and radius listed
below.
6 %% %%
!% $&  %'
969A 49’ (14.9 m)  P
$ P  P
$ P  P
$ ¶P  ¶P
7KHVWDELOLW\WHVWORDGZLOOEHWLPHVWKHORDG
FKRVHQIURPWKHORDGUDWLQJDUHDRIWKHFDSDFLW\
FKDUW
K6*X[
%RRP/HQJWK P
/RDGHG5DGLXV P
/RDG5DWLQJ OENJ
6WDELOLW\7HVW/RDG [OENJ
OENJ
,QFOXGHVZHLJKWVRIVOLQJVDQGGRZQKDXOEORFNV
%HVXUHWKHVWDELOLW\WHVWZHLJKWLVDFFXUDWH$
LQFUHDVHLQVWDELOLW\WHVWZHLJKWZLOOPHDQXS
WRDLQFUHDVHLQFRXQWHUZHLJKW([WHQGWKH
ERRPWRWKHPD[LPXPERRPOHQJWKDQGZLQFK
WKHVWDELOLW\ORDGRIIWKHJURXQG6ORZO\ERRPWKH
ORDGGRZQ VRWKHORDG ZLOOVZLQJRXW XQWLOWKH
ORDGHGUDGLXVLVUHDFKHG$VWKHERRPLVORZ
HUHGNHHSZLQFKLQJWKHORDGXSWRNHHSLWDERXW
LQFKHVRIIWKHJURXQG
$K%%%%'8
6ORZO\URWDWHWKHERRPWKURXJKRXWWKHZRUNDUHD
$VWKHERRPLVURWDWHGWKHERRPZLOOKDYHWREH
UDLVHGDQGRUORZHUHGWRPDLQWDLQWKHORDGHGUD
GLXVEHFDXVHRIVXEEDVHIOH[XUH
2QXQLWVQRWHTXLSSHGZLWKIURQWVWDELOL]HUVWLS
SLQJIURPVWDELOL]HUVXSSRUWWRIURQWZKHHOVXS
SRUW ZLOO RFFXU DV WKH ORDG RU ERRP LV VZXQJ
DURXQGWKHIURQW'RQRWDWWHPSWWROLIWUDWHGORDGV
DURXQGWKHIURQWRIWKHWUXFNXQOHVVWKHXQLWLV
HTXLSSHGZLWKDIURQWVWDELOL]HU
$*2&$3$%$&
56%^'%%4&'4&$j6'$
5%%'$%36$&'$%%4&&<7
$5$)8
 ,IVOLJKWWLSSLQJRFFXUVEXWORDGFDQEHNHSWIURP
FRPLQJLQFRQWDFWZLWKJURXQGE\ZLQFKLQJWKH
ORDGXSXQLWLVVWDEOH,IQRWFRXQWHUZHLJKWLQJ
ZLOOKDYHWREHDGGHGWRJHWXQLWLQDVWDEOHFRQ
GLWLRQRUGHFDOPXVWEHDGGHGWRGHILQHDUHDVRI
IXOOVWDELOLW\DQGDUHDVRIUHGXFHGFDSDFLW\EH
FDXVHRIVWDELOLW\,IWKHXQLWLVHTXLSSHGZLWKD
MLEWKHVWDELOLW\WHVWVKRXOGEHUHSHDWHG8VHWKH
IXOO\H[WHQGHGMLEFDSDFLW\PXOWLSOLHGWLPHV
DWWKHORZHVWDQJOHWKDWWKHMLELVUDWHGIXOO\H[
WHQGHG
 :KHQDGGLQJFRXQWHUZHLJKWWRWKHYHKLFOHLWLV
XVXDOO\PRVWHIIHFWLYHZKHQDGGHGDVFORVHWR
WKH FUDQH DV SRVVLEOH $IWHU DGGLQJ FRXQWHU
ZHLJKWWKHDERYHSURFHGXUHPXVWEHUHSHDWHG
WRLQVXUHWKHDGGHGFRXQWHUZHLJKWLVDGHTXDWH
 ,IXQLWLVQRWVWDEOHDURXQGWKHWUXFNDGH
FDOPXVWEHDGGHGVKRZLQJWKHZRUNLQJDUHDDF
FRUGLQJWRVWDELOLW\



























Reference Only