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National N-55
This load chart has been adapted from the original manufacturer’s load chart for
use in the NCCER Mobile Crane CertificationExamination. It is not to be used for calculating
loads, planning lifts, or for any other purpose.
LOAD CHARTSfor Use With
WRITTEN EXAMINATIONS
Manitowoc Crane Group, byproviding pages of one of its
manuals, is not providing asubstitute for training on a
Manitowoc crane.These pages are reproduced for
illustration only and not as asubstitute for reviewing the entire
manual for a particular crane.Make sure that you are fully
trained on, and review the entire manual for, every
crane you operate.
SA
FE
TY
IN
EQ
UIP
ME
NT
MA
INT
EN
AN
CE
A
ND
IN
SP
EC
TIO
N
Saf
e op
erat
ions
dep
ends
on
you,
the
con
ditio
n of
yo
ur m
aint
enan
ce,
and
insp
ectio
n pr
oced
ures
. T
he s
ingl
e m
ost
impo
rtan
t fa
ctor
in
the
prev
entio
n of
equ
ipm
ent
failu
re a
nd
acci
dent
s is
a p
ositi
ve a
ttitu
de t
owar
ds s
afet
y. T
he h
abit
of a
ntic
ipat
ing
poss
ible
pro
blem
s no
rmal
ly p
reve
nts
man
y ac
cide
nts
from
occ
urrin
g.
Insp
ectio
n ch
ecks
are
not
to
be o
v erlo
oked
. B
elo
w a
re l
iste
d se
vera
l im
port
ant
insp
ectio
ns t
hat
shou
ld b
e pe
rfor
med
bef
ore
and
durin
g op
erat
ion
of t
he u
nit.
Fur
ther
det
aile
d in
spec
tion
req
uire
men
ts a
re l
iste
d in
the
M
aint
enan
ce S
ectio
n.
• C
hass
is –
che
ck t
he o
il le
vel,
batte
ry,
light
s an
d br
akes
. •
Tire
s –
chec
k fo
r pr
oper
inf
latio
n, c
uts,
loo
se w
heel
nut
s.
• S
afet
y ac
cess
orie
s –
chec
k fo
r pr
oper
fun
ctio
n, o
il le
vel,
leak
s, e
tc.
• H
ydra
ulic
oil
rese
rvoi
r –
chec
k fo
r pr
oper
oil
leve
l, le
aks.
•
Str
uctu
rals
– v
isua
lly i
nspe
ct c
ompl
ete
cran
e fo
r da
mag
e es
peci
ally
fo
r cr
acks
in
wel
dmen
ts.
• F
aste
ners
– c
heck
all
pins
, sh
eave
s, r
etai
ners
, bo
lts a
nd n
uts.
Che
ck
for
pres
ence
and
pro
per
tight
ness
. •
She
aves
– c
heck
for
rop
e w
ear,
cra
cks
and
bear
ing
cond
ition
(if
equi
pped
w
ith o
ptio
nal
win
ch)
• H
ose/
fittin
gs –
che
ck f
or l
eaks
, ab
rasi
on a
nd l
oose
cla
mps
.
• C
rane
hoo
ks –
che
ck h
ook
for
safe
ty c
atch
, tw
ist
and
open
ing
of
hook
thr
oat.
• C
over
s an
d ga
urds
– c
heck
for
pro
per
inst
alla
tion.
•
Ope
ratin
g pl
acar
ds a
nd s
afet
y si
gns
– ch
eck
for
mis
sing
, ill
egib
le
defa
ces
sign
s an
d pl
acar
ds.
AT
A M
INIM
UM
YO
UR
CR
AN
E M
US
T
CO
NT
AIN
IN
FO
RM
AT
ION
ON
TH
E D
EC
ALS
SH
OW
N O
N P
AG
ES
7
TH
RO
UG
H 9
. IF
TH
ES
E D
EC
ALS
AR
E N
OT
PR
ES
EN
T O
R N
OT
LE
GIB
LE,
CO
NT
AC
T N
AT
ION
AL
CR
AN
E I
MM
ED
IAT
ELY
TO
O
RD
ER
TH
EM
.
• Li
fting
rop
e/sl
ings
– c
heck
rop
e an
d sl
ings
for
fra
yed
edge
s, b
roke
n st
rand
s, k
inks
fla
t sp
ots
and
end
atta
chm
ents
for
uns
afe
cond
ition
s.
• S
heav
es (
on c
rane
s eq
uipp
ed w
ith
win
ches
) –
chec
k fo
r ro
pe w
ear,
cr
acks
, an
d be
arin
g co
nditi
on.
National N-55 Page 1 of 5
CO
NT
RO
LS
CA
B C
ON
TR
OLS
P
ower
Tak
e-of
f M
anua
l S
hift
Con
trol
– T
he P
TO
’s a
re e
ngag
ed
whe
n th
e kn
obs
on
dash
or
floor
are
pul
led
out
and
dise
ngag
ed w
hen
the
knob
s ar
e pu
shed
in.
T
he t
ruck
gea
r sh
ift l
ever
mus
t be
in
neut
ral
and
the
clut
ch d
epre
ssed
w
hene
ver
knob
s ar
e re
mov
ed.
All
Shi
ft C
ontr
ol –
The
PT
O i
s en
gage
d w
hen
the
switc
h is
mov
ed
to a
pply
air
to P
TO
and
dis
enga
ged
whe
n sw
itch
is i
n of
f po
sitio
n. T
he t
ruck
ge
ar s
hift
leve
r m
ust
be i
n ne
utra
l an
d cl
utch
dep
ress
ed
whe
n sw
itch
is
mov
ed.
Ele
ctric
al S
hift
Con
trol
– F
ull
torq
ue e
lect
ric s
hift
PT
O’s
are
co
ntro
lled
by a
sw
itch.
To
oper
ate,
dis
eng
age
the
clut
ch,
shift
to
four
th o
r fif
th g
ear
and
oper
ate
the
switc
h do
wn
to e
ngag
e th
e P
TO
or
up t
o di
seng
age
the
PT
O.
Ret
urn
the
gear
shift
to
neut
ral
and
enga
ge t
he c
lutc
h.
If th
e ve
hicl
e is
equ
ippe
d w
ith a
utom
atic
tra
nsm
issi
on,
the
pow
er t
ake-
off
may
be
enga
ged
by p
laci
ng t
he t
rans
mis
sion
sel
ecto
r le
ver
in a
ny d
rivin
g po
sitio
n an
d th
en e
ngag
ing
the
PT
O.
The
tra
nsm
issi
on s
elec
tor
leve
r m
ust
be t
urne
d to
“N
” fo
r st
atio
nary
veh
icle
ope
ratio
n. T
he p
ow
er t
ake-
off
may
be
dise
ngag
ed
whi
le i
n an
y tr
ansm
issi
on r
ange
pro
vide
d th
at t
he l
oad
has
first
be
en r
emov
ed f
rom
the
PT
O.
Par
k B
rake
T
he t
ruck
bra
ke m
ust
be f
irmly
set
bef
ore
leav
ing
cab
to b
egin
ope
ratio
n. I
f th
e gr
ound
sur
face
is
icy
or s
lick
or i
s sl
oped
, yo
u m
ay b
e re
quire
d to
hel
p im
mob
ilize
the
tru
ck w
ith
whe
el c
hock
s.
CR
AN
E C
ON
TR
OLS
T
he u
nit
is e
quip
ped
with
con
trol
sta
tions
on
each
sid
e of
the
mai
n fr
ame.
P
laca
rds
on c
ontr
ol k
nobs
or
next
to
the
leve
r in
dica
te t
he d
irect
ion
to
actu
ate
the
cont
rols
for
the
var
ious
uni
t fu
nctio
ns.
Eac
h st
atio
n is
com
plet
e an
d pr
ovid
es c
ompl
ete
cont
rol
of
boom
rot
atio
n, b
oth
elev
atio
n, b
oom
ex
tens
ion,
w
inch
, ou
trig
gers
, an
d en
gine
foo
t th
rottl
e.
Con
trol
Fun
ctio
ns
The
uni
t is
equ
ippe
d w
ith c
ontr
ol s
tatio
ns o
n ea
ch s
ide
of t
he m
ain
fram
e.
Pla
card
s on
the
con
trol
kno
bs o
r ne
xt t
o th
e le
ver
indi
cate
the
dire
ctio
n to
ac
tuat
e th
e co
ntro
ls f
or t
he v
ario
us u
nit
func
tions
. E
ach
stat
ion
is c
ompl
ete
and
prov
ides
com
plet
e co
ntro
l of
boo
m r
otat
ion,
boo
m l
ift,
boom
fol
d, b
oom
ex
tens
ion,
w
inch
and
out
rigge
rs.
Con
trol
Fun
ctio
ns
T
urn
– R
aise
the
lev
er t
o ro
tate
the
boo
m i
n a
cloc
kwis
e di
rect
ion.
Lo
wer
the
lev
er t
o ro
tate
the
boo
m i
n a
coun
terc
lock
wis
e di
rect
ion
as v
iew
ed
from
the
top
of
the
cran
e.
B
oom
Lift
– L
ower
the
lev
er t
o lo
wer
the
inn
er b
oom
. R
aise
the
le
ver
to r
aise
the
inn
er b
oom
.
Boo
m F
old
– Lo
wer
the
lev
er t
o fo
ld t
he o
uter
boo
m u
nder
and
do
wn.
Rai
se t
he l
ever
to
fold
the
out
er b
oom
out
and
up.
Boo
m T
eles
cope
– L
ower
the
lev
er t
o re
trac
t th
e hy
drau
lic
exte
nsio
ns.
Rai
se t
he l
ever
to
exte
nd t
he h
ydra
ulic
ext
ensi
ons.
O
utrig
ger
Sel
ecto
r –
Rai
se t
he l
ever
for
driv
er’s
sid
e ou
trig
ger
oper
atio
n. L
ower
lev
er f
or p
asse
nger
’s s
ide
outr
igge
r op
erat
ion.
Pos
ition
le
ver
in C
EN
TE
R t
o m
ove
outr
igge
rs i
nwar
d an
d ou
twar
d.
Out
rigge
rs –
Rai
se t
he l
ever
to
rais
e th
e ou
trig
ger
legs
or
retr
act
horiz
onta
l be
ams.
Low
er t
he l
ever
to
low
er t
he o
utrig
ger
legs
or
exte
nd
horiz
onta
l be
ams.
Han
d T
hrot
tle (
Driv
er’s
Sid
e O
nly)
– P
ull
the
hand
thr
ottle
out
to
acce
lera
te t
he t
ruck
eng
ine
spee
d an
d ro
tate
cou
nter
cloc
kwis
e to
loc
k.
Incr
easi
ng t
ruck
spe
ed i
ncre
ases
ope
ratin
g sp
eed.
Unl
ock
and
push
in
to
retu
rn t
o id
le s
peed
.
Cap
acity
Cha
rt –
Thi
s ch
art
sho
ws
capa
citie
s of
cra
ne a
t va
rious
op
erat
ing
hook
poi
nts.
National N-55 Page 2 of 5
OP
ER
AT
ING
PR
OC
ED
UR
ES
EQ
UIP
ME
NT
FA
MIL
IAR
IZA
TIO
N
Mem
bers
of
the
cre
w s
houl
d be
com
e th
orou
ghly
fam
iliar
w
ith t
he l
ocat
ion
and
oper
atio
n of
con
trol
s, t
he c
orre
ct o
pera
ting
proc
edur
e, t
he m
axim
um
liftin
g ca
paci
ties
and
safe
ty p
reca
utio
ns a
pplic
able
to
the
unit
befo
re
oper
atin
g. T
his
cran
e is
a c
ompl
ex
piec
e of
equ
ipm
ent
and
can
be
over
load
ed i
n m
any
way
s. C
aref
ully
fol
low
the
ope
ratin
g pr
oced
ures
out
lines
be
low
.
EQ
UIP
ME
NT
CH
EC
KS
P
erfo
rm t
he f
ollo
win
g ch
ecks
prio
r to
pla
cing
the
uni
t in
ope
ratio
n:
• In
spec
t fo
r an
y un
usua
l co
nditi
ons
such
as
poo
ls o
f hy
drau
lic f
luid
or
lub
ricat
ion
oil
unde
r th
e ch
ass
is,
any
outr
igge
r w
hich
may
hav
e cr
ept
dow
n or
any
sig
ns o
f da
mag
e or
im
prop
er m
aint
enan
ce.
• C
heck
tha
t th
e tir
es a
re i
nfla
ted
to t
he p
rope
r pr
essu
re.
• C
heck
the
lev
el o
f th
e hy
drau
lic r
eser
voir.
•
Che
ck f
or l
oose
and
mis
sing
bol
ts.
• C
heck
pin
s fo
r pr
oper
ins
talla
tion
and
reta
iner
sec
uren
ess.
•
Che
ck f
or d
amag
ed s
truc
tura
l m
embe
rs a
nd w
elds
. •
Che
ck t
o se
e an
ti-tw
o bl
ock
wor
ks c
orre
ctly
(if
equi
pped
w
ith
optio
nal
win
ch).
•
Che
ck a
ll ro
pe g
uide
s an
d ca
ble
keep
er (
if eq
uipp
ed
with
opt
iona
l w
inch
).
• C
heck
all
shea
ves
for
free
tur
ning
(if
equi
pped
w
ith o
ptio
nal
win
ch).
•
Che
ck t
he l
oadl
ine
cabl
e fo
r ki
nks,
bro
ken
stra
nds
or o
ther
dam
age
in a
ccor
danc
e w
ith i
nstr
uctio
ns i
n th
e “L
ubric
atio
n &
Mai
nten
ance
” se
ctio
n (if
equ
ippe
d w
ith o
ptio
nal
win
ch).
•
Che
ck t
o se
e th
at t
he h
ydra
ulic
hos
es a
nd f
ittin
gs a
re i
n go
od
cond
ition
and
sho
w n
o si
gns
of l
eaki
ng.
The
hos
es s
houl
d be
fre
e fr
om c
uts
and
abra
sion
s an
d th
ere
shou
ld b
e no
evi
denc
e of
bi
ndin
g. A
ny d
amag
e or
lea
kage
sho
uld
be r
epai
red
imm
edia
tely
.
NO
TE
: C
ON
SU
LT T
RU
CK
MA
NU
FA
CT
UR
ER
’S M
AN
UA
L F
OR
V
EH
ICLE
CH
EC
KS
.
WO
RK
SIT
E P
OS
ITIO
N
Alw
ays
seek
the
bes
t po
ssib
le w
ork
site
w
hen
park
ing
the
cran
e. A
n id
eal
park
ing
loca
tion
at a
job
site
is
firm
, le
vel,
dry
grou
nd o
r pa
vem
ent
loca
ted
in
clos
e pr
oxim
ity t
o th
e w
ork
stat
ion.
Avo
id u
neve
n, r
ocky
or
mud
dy t
erra
in,
stee
p gr
ades
or
loca
tions
w
ith u
nnec
essa
ry o
verh
ead
obst
ruct
ions
. Lo
catio
n sh
ould
be
sele
cted
suc
h th
at o
utrig
gers
can
be
fully
ext
ende
d ho
rizon
tally
an
d ve
rtic
al l
eg c
omes
dow
n on
firm
lev
el
surf
ace.
Par
ticul
ar c
are
mus
t be
ta
ken
in s
elec
ting
site
pos
ition
to
the
loca
tion
of o
verh
ead
pow
er l
ines
so
that
pr
oper
cle
aran
ce c
ondi
tions
can
be
ma
inta
ined
. Id
eally
, on
e sh
ould
sel
ect
a
loca
tion
at
whi
ch t
he b
oom
cou
ld n
ot c
ome
with
in t
he m
inim
um
reco
mm
ende
d di
stan
ce o
f th
e po
wer
lin
es.
It is
bes
t to
sel
ect
a lo
cati
on o
n th
e si
te s
uch
that
mos
t of
the
lift
ing
can
be
done
ove
r th
e ou
trig
ger
supp
ort or
rea
r of
the
tru
ck.
BE
FO
RE
LE
AV
ING
TH
E C
AB
1.
S
et t
he t
ruck
han
d br
ake
secu
rely
and
tur
n th
e fr
ont
whe
els
into
the
cu
rb,
if ap
plic
able
. W
heel
cho
cks
may
be
requ
ired
unde
r ce
rtai
n co
nditi
ons.
2.
W
ith t
he g
ear
shift
in
neut
ral,
depr
ess
clut
ch (
if eq
uipp
ed
with
a
man
ual
tran
smis
sion
), a
nd e
ngag
e th
e po
wer
tak
e-of
f by
pul
ling
out
the
shift
ing
knob
. 3.
B
ring
the
hydr
aulic
sys
tem
up
to
oper
atin
g te
mpe
ratu
re (
oil
rese
rvoi
r w
arm
to
the
touc
h) b
y al
low
ing
the
syst
em t
o op
erat
e w
ith
all
cont
rols
at
neut
ral.
SE
TT
ING
TH
E O
UT
RIG
GE
RS
1.
B
efor
e co
nduc
tion
any
boom
ope
ratio
ns,
exte
nd b
oth
outr
igge
rs t
o fu
ll ho
rizon
tal
then
dow
nwar
d to
mak
e fir
m c
onta
ct
with
the
gro
und.
P
rovi
de b
lock
s, i
f ne
cess
ary,
to
leve
l th
e un
it on
slo
ping
gro
und
or
bear
ing
pads
if
the
outr
igge
rs t
end
to s
ink
into
sof
t te
rrai
n or
hot
as
phal
t. S
ome
conc
rete
or
asph
alt
surf
aces
are
rel
ativ
ely
thin
and
ca
nnot
with
stan
d ou
trig
ger
load
ing.
Con
cret
e ca
n br
eak
thro
ugh
and
caus
e in
stab
ility
. 2.
A
ll ou
trig
gers
sha
ll be
ext
ende
d fu
lly o
ut t
hen
dow
n to
a f
irm
surf
ace.
Par
k th
e ve
hicl
e on
lev
el
fron
t to
bac
k an
d us
e ou
trig
gers
as
nec
essa
ry t
o le
vel
the
truc
k si
de t
o si
de.
If th
e ou
trig
gers
are
not
vi
sibl
e at
the
ope
rato
r’s s
tatio
n, a
sig
nal
pers
on s
houl
d be
use
d to
be
sur
e th
e ou
trig
gers
are
set
saf
ely.
It is
not
rec
omm
ende
d to
rem
ove
all
the
vehi
cle
wei
ght
from
whe
els.
E
xtre
me
caut
ion
mus
t be
use
d w
hen
oper
atin
g in
are
as a
roun
d th
e tr
uck
not
supp
orte
d by
out
rigge
rs b
ecau
se o
f cu
shio
n of
tire
s an
d sp
rings
. A
lso,
w
hen
swin
ging
loa
ds f
rom
are
as s
uppo
rted
by
outr
igge
rs t
o ar
eas
not
supp
orte
d by
out
rigge
rs,
extr
eme
caut
ion
mus
t be
use
d be
caus
e of
a p
oten
tial
sudd
en
shift
ing
of t
he s
uppo
rt p
oint
. A
lway
s ke
ep t
he l
oad
as c
lose
to
the
grou
nd a
s po
ssib
le
whe
n op
erat
ing.
National N-55 Page 3 of 5
BO
OM
UN
ST
OW
ING
PR
OC
ED
UR
E
1.
Pus
h th
e fo
ld c
ontr
ol l
ever
dow
n,
rais
e th
e ou
ter
boom
as
high
as
it w
ill g
o.
2.
Rai
se t
he l
ift c
ylin
der
cont
rol
leve
r w
hich
w
ill c
ause
the
inn
er b
oom
to
lift
. R
aise
it
to a
pos
ition
tha
t w
ill a
llow
the
out
er b
oom
to
unfo
ld.
3.
Rai
se t
he f
old
cont
rol
leve
l an
d un
fold
the
out
er b
oom
. 4.
B
efor
e us
ing
the
cran
e, u
nhoo
k th
e lo
ad h
ook
from
its
slo
w p
in s
o th
at t
he h
ydra
ulic
ext
ensi
ons
may
be
exte
nded
and
ret
ract
ed.
BE
FO
RE
MA
KIN
G T
HE
LIF
T
1.
Che
ck a
ll co
ntro
ls f
or p
rope
r op
erat
ion
by o
pera
ting
each
sys
tem
th
roug
h on
e co
mpl
ete
cycl
e. T
his
is p
artic
ular
ly i
mpo
rtan
t af
ter
the
unit
has
been
ser
vice
d or
rep
aire
d. I
f an
y ab
norm
al o
pera
tions
are
de
tect
ed,
corr
ect
the
cond
ition
bef
ore
cont
inui
ng.
2.
D
urin
g al
l op
erat
ions
, th
e co
ntro
ls s
houl
d be
met
ered
w
hen
begi
nnin
g or
ter
min
atin
g a
mov
emen
t to
pre
vent
sud
den
star
ting
or
stop
ping
w
hich
im
pose
s un
due
shoc
k lo
ads
on t
he e
quip
men
t. T
his
met
erin
g ca
n be
per
form
ed b
y m
eter
ing
the
cont
rol
leve
r.
3.
Che
ck t
he o
pera
ting
area
for
ele
ctric
po
wer
lin
es.
RE
AD
ING
AN
D U
ND
ER
ST
AN
DIN
G T
HE
CA
PA
CIT
Y C
HA
RT
T
he s
truc
ture
s an
d co
mpo
nent
s of
you
r un
it ar
e de
sign
ed t
o pr
ovid
ed
satis
fact
ory
serv
ice
if th
e un
it is
not
loa
ded
in e
xces
s of
the
max
imum
ca
paci
ties
spec
ified
on
the
capa
city
cha
rt.
Ove
rload
ing
can
crea
te s
erio
us
pote
ntia
l sa
fety
haz
ards
and
can
als
o s
hort
en t
he s
ervi
ce l
ife o
f yo
ur u
nit.
It is
im
port
ant
that
you
kno
w t
he w
eigh
t of
any
loa
d th
at y
ou a
re a
ttem
ptin
g to
ha
ndle
. T
his
shou
ld b
e do
ne b
y us
e of
a d
ynam
omet
er o
r by
con
tact
ing
your
su
perv
isor
. O
verlo
adin
g a
cran
e ca
n ca
use
man
y ty
pes
of f
ailu
re d
epen
ding
on
the
conf
igur
atio
n an
d w
orki
ng p
ositi
on o
f th
e cr
ane,
i.e
. st
ruct
ural
dam
age
to
alm
ost
any
part
of
the
cran
e, w
inch
or
cabl
e fa
ilure
and
tip
ping
ove
r th
e un
it.
The
cap
acity
cha
rt s
how
s th
e m
axim
um r
ated
lo
ads
incl
udin
g lo
ad (
wei
ght
bein
g lif
ted)
, lo
ad
hand
ling
equi
pmen
t su
ch a
s sl
ings
, bu
cket
s,
and
dow
nhau
l w
eigh
ts,
etc.
whi
ch c
an b
e ha
ndle
d by
the
cra
ne a
nd t
he w
inch
. T
he
wei
ght
of t
he l
oad
hand
ling
equi
pmen
t an
d bo
om a
ttach
men
ts m
ust
be d
educ
ted
from
the
m
axim
um l
oad
ratin
g sh
own
on t
he c
apac
ity
char
t to
det
erm
ine
the
payl
oad
whi
ch c
an
be l
ifted
. A
dditi
onal
red
uctio
n m
ay
be n
eces
sary
to
mak
e al
low
ance
for
su
ch f
acto
rs a
s th
e ef
fect
s of
fre
ely
susp
ende
d lo
ads,
win
d, g
roun
d co
nditi
ons,
out
-of-
leve
l co
nditi
ons
and
oper
atin
g sp
eeds
.
The
rat
ings
sho
wn
on t
he c
apac
ity c
hart
are
bas
ed o
n th
e st
ruct
ural
int
egrit
y of
the
cra
ne a
nd w
inch
and
rep
rese
nt a
st a
bilit
y tip
ping
fac
tor
of 8
5%
whe
n:
1.
All
outr
igge
rs a
re e
xten
ded
with
pos
itive
con
tact
on
firm
, le
vel
surf
ace.
2.
The
pro
per
amou
nt o
f co
unte
rwei
ght
has
been
ins
talle
d, i
f re
quire
d.
3.
The
uni
t is
mou
nted
in
acco
rdan
ce
with
fac
tory
ins
truc
tions
on
a ve
hicl
e w
ith p
rope
r sp
ecifi
catio
ns.
4.
Tire
s ar
e in
flate
d to
the
pro
per
pres
sure
. 5.
T
he w
eigh
t of
loa
d ha
ndlin
g de
vice
s is
con
side
red
as a
par
t of
the
lo
ad b
eing
lift
ed.
6.
Adv
erse
env
ironm
enta
l co
nditi
ons
such
as
win
d ar
e no
t pr
esen
t. 7.
T
he o
pera
tor
cont
rols
the
load
s sm
ooth
ly.
A s
tabi
lity
test
sho
uld
have
bee
n pe
rfor
med
on
this
cra
ne a
nd c
an b
e re
peat
ed b
y a
refe
renc
e to
the
ins
tal la
tion
Sec
tion
of t
he O
pera
tion
and
Mai
nten
ance
man
ual.
Thi
s cr
ane
is r
efer
red
to a
s a
“hoo
k po
int
mac
hine
” w
hen
disc
ussi
ng
capa
citie
s. T
hat
is,
the
capa
citie
s ar
e sh
ow
n on
the
cap
acity
cha
rt a
s th
e ca
paci
ties
at s
peci
fic h
ook
poin
ts r
athe
r th
an a
s at
spe
cific
loa
ds r
adiu
s or
co
mbi
natio
ns o
f bo
om a
ngle
s an
d bo
om l
engt
hs.
Bec
ause
thi
s is
a h
ook
poin
t m
achi
ne,
a lo
ad c
an b
e lif
ted
if th
e lo
ad f
alls
w
ithin
the
cap
acity
of
the
part
icul
ar h
ook
poin
t us
ed t
o po
sitio
n th
e lo
ad.
If th
e lo
ad i
s w
ithin
the
ca
paci
ty o
f th
e ho
ok p
oint
tha
t is
use
d to
rai
se t
he l
oads
, th
e lo
ad c
an b
e po
sitio
ned
anyw
here
the
hoo
k ar
c pe
rmits
. T
he c
apac
ity c
hart
is
loca
ted
near
the
ope
rato
r’s s
tatio
n fo
r qu
ick
refe
renc
e co
ncer
ning
loa
ds
whi
ch c
an o
r ca
nnot
be
hand
led.
The
fol
low
ing
proc
edur
e is
a t
ypic
al m
etho
d w
hich
mus
t be
use
d to
de
term
ine
the
cran
e’s
abili
ty t
o ha
ndle
a l
oad:
1.
Det
erm
ine
the
wei
ght
of t
he l
oad
and
load
han
dlin
g eq
uipm
ent.
2.
Det
erm
ine
the
radi
us f
rom
cen
ter l
ine
of c
rane
rot
atio
n to
pos
ition
of
load
. 3.
D
eter
min
e th
e ra
dius
fro
m c
ente
rlin
e of
cra
ne r
otat
ion
to c
ente
r of
po
int
whe
re l
oad
is b
eing
mov
ed t
o.
4.
Ref
er t
o C
apac
ity C
hart
for
cra
ne a
nd d
eter
min
e w
hat
hook
poi
nt
will
be
used
to
insu
re t
hat
the
load
doe
s no
t ex
ceed
the
cap
acity
of
the
hook
poi
nt.
5.
Ref
er t
o C
apac
ity C
hart
for
win
ch,
if
equi
pped
, to
ins
ure
the
load
do
es n
ot e
xcee
d th
e w
inch
cap
acity
.
National N-55 Page 4 of 5
WIN
CH
SY
ST
EM
OP
ER
AT
ION
(OP
TIO
NA
L)
The
win
c his
mou
nted
onth
ere
arbo
ttom
ofth
eou
ter
boom
.It
has
capa
citie
sto
tally
inde
p end
ent
ofth
ere
stof
the
cran
ean
dca
nno
rmal
lypu
llm
ore
than
the
cran
eit s
elf
can
with
sta n
d.T
here
fore
,ca
rem
ust
beta
ken
toin
sure
that
the
load
bein
gli f
ted
isw
ithin
boom
ratin
g.T
olif
tso
me
ofth
ehe
a vie
rlo
ads
o nth
eca
p aci
tych
art,
itw
illbe
nece
ssar
yto
mul
tiple
-par
tre
eve
the
win
chbl
ock
toin
crea
seth
elif
ting
capa
city
ofth
ew
inch
(the
spee
dis
pro p
ortio
nate
lysl
ow
er)
a nd
rem
ain
inth
est
reng
thlim
itati
ons
ofth
ew
inch
and
wire
rope
.
The
win
chlo
adra
ting
char
ton
each
mac
hine
prov
ides
the
info
rmat
ion
for
pull
limita
tions
onth
ew
inch
with
vario
usap
plic
able
part
reev
ings
.T
hese
ratin
gsar
eba
sed
onpr
ovid
ing
the
prop
erop
erat
ing
safe
tyfa
ctor
onth
ew
irero
pesu
pplie
dw
ithth
em
achi
ne.
The
refo
re,
any
repl
acem
ent
rope
mus
tm
eet
the
rope
spec
ifica
tions
for
size
,c
onst
ruct
ion
and
stre
ngth
asou
tline
din
spec
ifica
tion
sect
ions
ofth
ism
anua
l.
GE
NE
RA
LR
ULE
SW
HE
NO
PE
RA
TIN
GW
INC
H
1.A
lway
sop
erat
eth
ew
inch
cont
rol
topa
yout
the
load
line
whi
leex
tend
ing
the
boom
.T
his
will
mai
ntai
ncl
eara
nce
betw
een
the
boom
tipan
dlo
adlin
eho
ok.
2.D
ono
tpu
lllo
adbl
ock
into
boom
tipex
cept
whe
nte
stin
gan
ti-tw
obl
ock
syst
em.
3.M
ake
cert
ain
the
win
chca
ble
isno
ttw
iste
dor
kink
edan
dth
atca
ble
ispr
oper
lyse
ated
onth
edr
uman
din
the
shea
ves.
4.B
efor
elif
ting
alo
ad,
alw
ays
mak
ece
rtai
nth
atth
ree
full
wra
psof
rope
will
rem
ain
onth
edr
umat
all
times
thro
ugho
utth
elif
t.5.
Do
not
drag
load
sin
any
dire
ctio
nw
ithth
ew
inch
.6.
Nev
erat
tem
ptto
lift
load
sw
hic
har
eno
tlo
ose
and
free
,i.e
.fr
ozen
dow
nm
ater
ial
orpo
les
out
ofgr
ound
.7.
Mai
ntai
nte
nsio
non
the
load
lines
atal
ltim
esto
prev
ent
the
cabl
efr
ombe
com
ing
twis
ted
orki
nked
orim
prop
erly
seat
edon
the
win
chdr
umor
shea
ves.
8.T
hew
inch
and
shea
vecl
ocks
mus
tbe
rigge
das
show
nin
the
oper
ator
’sm
anua
l.9.
Ifan
ti-tw
obl
ock
syst
emis
onth
em
achi
neit
mus
tbe
rigge
dan
dte
sted
for
oper
atio
npr
ior
tous
ing
the
win
ch.
LIF
TIN
GT
HE
LOA
D
Afte
rth
eve
hicl
ean
dcr
ane
have
been
prop
erly
set
upan
dit
has
been
dete
rmin
edth
elo
adto
belif
ted
isw
ithin
the
ratin
gsof
the
cran
ean
dw
inch
reev
ing
syst
em,
ifeq
uipp
ed,
agai
nch
eck
the
wor
kar
eafo
rel
ectr
icpo
wer
lines
and
othe
rob
stru
ctio
nsso
that
prop
ercl
eara
nces
can
bem
aint
aine
d.
(See
Saf
ety
Rul
es.)
Iflo
adis
not
visi
ble
toop
erat
orth
roug
hout
lift,
ape
rson
mus
tbe
appo
inte
dto
use
hand
sign
als
assh
own
onth
ela
stpa
geof
this
sect
ion.
Pro
ceed
with
liftin
gth
elo
ad.
1.S
eten
gine
spee
das
requ
ired,
then
rota
te,
exte
ndor
mov
ebo
omup
ordo
wn
until
boom
tipis
dire
ctly
over
the
load
.2.
Mos
tcr
anes
are
equi
pped
with
390°
rota
tion
stop
.It
isim
port
ant
that
you
beaw
are
ofth
epo
sitio
nof
the
stop
bef o
relif
ting
inor
der
toas
sure
max
imum
rota
tion
and
prev
ent
exce
ssiv
eha
ndlin
gof
the
load
.3.
Dur
ing
oper
atio
ns,
the
cont
rols
shou
ldal
wa
ysbe
met
ered
whe
nbe
ginn
ing
orte
rmin
atin
gm
ovem
ent
topr
even
tsu
dden
star
ting
orst
oppi
ng,
whi
chim
pose
sun
due
shoc
klo
ads
onth
eeq
uipm
ent.
Thi
sis
espe
cial
lytr
uew
hen
hand
ling
heav
ylo
ads.
The
cont
rol
shou
ldbe
slig
htly
actu
ated
tobe
gin
mov
emen
tan
dth
ensl
ow
lyin
crea
sed
tode
sire
dop
erat
ing
spee
d.4.
Low
erbo
omtip
and
atta
chlo
ad.
5.C
ontr
ollo
adby
use
ofa
non-
cond
uctiv
eta
glin
e.6.
Whe
nlif
ting
max
imum
load
s,op
erat
ew
ithth
eou
ter
boom
slig
htly
fold
edin
rela
tions
hip
toth
ein
ner
boom
for
the
grea
test
liftin
gpo
wer
.
ST
OW
ING
PR
OC
ED
UR
E
The
follo
win
gpr
oced
ure
outli
nes
t he
step
-by-
step
proc
ess
that
shou
ldbe
follo
wed
whe
nst
owin
gan
dun
stow
ing
the
boom
.1.
Ret
ract
all
man
ual
and
hydr
aulic
exte
nsio
ns.
Ifth
eun
itis
equi
pped
with
anop
tiona
lw
inch
,cl
am,
grap
ple,
orpe
rson
nel
buck
et,
the
optio
nat
tach
men
tbr
acke
tm
ust
bere
mov
edfr
omth
ebo
omtip
prio
rto
stow
ing
the
boom
.2.
With
the
lift
cylin
der,
rais
eth
ein
ner
boom
toap
prox
imat
ely
horix
onta
l.3.
Rot
ate
cran
eun
tiltu
rnst
ow
arro
ws
are
inal
ignm
ent
onba
seof
mas
t.4.
Use
the
fold
oper
atio
nun
tilth
efo
ldcy
linde
ris
fully
retr
acte
d.5.
The
inne
rbo
omis
low
ered
until
the
sto
wpi
nsw
ings
dow
nan
don
toth
est
owbr
acke
t.6.
To
stow
the
boom
,re
vers
eth
eab
ove
proc
edur
e.
National N-55 Page 5 of 5
