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PAGE
T
P
L 7
OPER TION
M INTEN N E
OF
MATERIAL
H NDLING
EQUIPMENTS
MODULE
8
EOT CRANES
Course
Name
OPERATION
MAINTENANCE
OF
MATERIAL
HANDLING
EQUIPMENTS
Course
Number
L 7
Module
Number
8
Module
Title
EOT
Cranes
Objtcth
es
rarticipants
wll
be
able to
understaod
Operation
Components
of
Cranes
Duration
25
days
Two
sessions
of
45Min
each
Number
of
Pages
8
Necessary
Facilities
Class
Room
Necessary
Instruments
35
mmSlide
projector
S T U N T
S
GUIDE
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PAGE
TLOT
OPERATION
MAINTENANcE
OF
MATERIAL
HANDuNG
QUIPMENTS
MODULE
8
EOT
CRANES
Table
o
Contents
EOT
CRANES
8
INTRODUCTION
Page
J
J
J
8
8 2
TYPES OF
CRANES
8 3
OMPONENTS
8
4
OPERATION
8
5
CONCLUSION
STUDENTS
GU
oe
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PAGE
T
P
L 7
OPERAnoN
M INTEN N E
oF MATERIAL
HANDlJNG
EQUIPMENTS
MODULE
EOT
cRANES
In
this Chapter
we
shall
give
a
broad
outline
of
the components
general
working
principles
maintenance
and
safety
practices
onthe
following
equipments
EOTCRANE
8
INTRODU TION
An
OverheadTravell ing
Crane
shall
consist
essentially
of
a
girder
supported
ateacll
CllJ
on
c
l lKges
capabie
of
travellmg
on
elevated
fixed
tracks
and
trolley
e q u i p p e d
wttb
hoisting
mechanismcapable
oftravclling
from
end
tond
on
such
a
girder
I
8
TYPES
OF
CRANES
Over
Head
Traveling
Cranes
can
be
classified
as
a
Nonlectric
floor
controlled
Cranes
b Semi
Electric
OHT
Cranes
c
Electric
om
ranes
8 3
MAIN
OM PONENTS
The
main
parts
of
anElectric
EOT
Crane
are
Cabin
2
Track
Rail
3
Wheel
4
arriage
5
Flexible
Cable
6 Auxillary
Hoist
7
Hoisting
mechanism
S T U N T
UlOE
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PAGE
T
P LD7
OPER TION
M INTEN NcE
OF
M TERI L
HANOUNG
QUJPMENTS
MOOULE
8
EOT
CRANes
8
Trolley
9
atenary
wire
Special
platfonn
II
Platfonn
2
Cross
Traverse
Mechanism
3
Travel
Mechanism
They
are
i l lustrated
in
the
Fig
8
I a
The
main
part
o
a
Crane
is
the
Hoisting mechanism and
a
typical
set
is
lJustrat
in
Fig
8
h
Th
m
m
put
o
theI
vistiu
Mechanism
are
I
Brake
2
Sheaves
3
Upper
Block
4
Electric
Motor
5
Standing
Reducer
6
Drive
wheel
7
Striker
8
Drum
8
Trolley
Frame
to
Limit
switch
II
Idle
Wheel
2
Hook
Block
uxiliary
Hoist
3
Reducer
4
Hook
Block Main
Hoist
For
moe
clarity
Standard
units
o
Hoisting
Installations
are
illustrated
n
8
c
8 4
OPERATION
The
operation
o
a
Crane is
a
very
important
aspect
because
the
smooth
functioning
and
trouble
free
operation
depends
on
the
knowledge
skill
nd
practice
o
he
Crane
operator
The
yard
sticko
identifying
a
good
perator
is
the
smoothness
with
which
the
various
movementso
therane
are
to
e
carried
out
STUOENrs
GUIDE
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PAGE
5
T P
L 7
OPERATION
M INTEN N E
OF
MATERIAL
HANDLING
EQUIPMENTS
MODULE
8
EOT
CRANES
A
I
CA8
N
TRACK
RAl
J WtiEEl
4
CARRIAGE
5
FLEXIBLE
CABLE
AUX L
IARY
o
T
HOIS
liNG
MECtiAhl
TROLLEY
9
HlY
WIRE
SPECIAL
PlATFORIo4
PLATFOAtoI
CROSS
T
AVERSE
MECHANI
J
TRAVEL
MECHANlStoI
f
a
ElEC
TRIC OVERHEAD
BRIDGE
CRAN
STUDENT
S
GUIDE
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TP
L 7
OPERATION
MAINTENANcE
Of
MATERIAL
HANOUNG
EQU PMENTS
MODUlE
8
EOT
CRANES
I
IIRAIIE
StifAYFS
3
UPPER BLOCK
4
ELECC
OTOR
5
BRAIll
6
S
T
A
G
REDUC
fR
7 ORI
Y
HEfl
I
StRIKER
9
fLfCTI
IC
MOIOR
ORUI
II
mOUEY
fR
u
E
2
LIIoIIT
SWITCH
3 lI IT
S
WIT
CH
4
IDLE
WHEEl
IS
lEe
TRIC
IoIOTOIl
6
HOOII
BLOCK
AUlllARY
HOI
T
7
RU
e
REDUCE R
REOJCf II
HOCltI
BLOCK t
HOIST
l
WO
HOIST
TROLLEY
OF
AN
OVERHEAD
BRIDGE
CRANE
STUDENTS
GUIDE
PAGE
6
t
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PAGE
7
TP
L 7
OPERATION MAINTENANCE
OF
MATERIAL
HANDLING
EQUIPMENTS
MODULE 8
EOT CRANES
j
2
I
4
@OM
t
2 J 4
8
I
TRAVELLING
W
HL
WITH
BEARING
BOll
2ENO CAIIAIAC
E
WITH TRAVELLING WHEELS
J HOOlI BLOC
4 STANDING PULLh
S
DOC CQJP
IN
6 COHTHO
ONSOLE
OPERATOR
S
CAe
CLAIo4P
TYP
E
CRANE
ORAC f
BRAKE
WTH
ELECTRQ
HYORAl
iLlC
AELUSE
BRAKEWTh
SH
T
STIOKE ELECTROo4AliHET
RELEASE
II ElEe
rAe
OTOR
n
HOlsrlNc
ORU
CABLE
REEL
4
SPRI
G BUFF R
s fH
us
6
HORIZO
ALly
RA GEO
R
OUCTION CURING
7
yERTlCAllY
A EO
EDUCTION GURING
I SLWING
CE
EOuCER
I
BALL
OUNfED
TUIlNTI
8 E
c
STANDARD UNITS OF HOISTING INSTALLATIONS
STUDENT
S GUIOE
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PAGE
8
T P
L 7 OPERATION MAINTENANCE OF
MATERIAL
HANDlING
EQUPMENTS
MODULE
8 EOTCRANES
8 5 CONCLUSION
The
Hydraulic
Pump
actuates
the
Cylinders
which
operates
the
Fork
and
the
tilting
o
the
vertical
frame
The
Frame
can
betilted
forward
by
3
to
5
degrees
for
simplifying
theload
gripping
and
canbe
tilted backward
by
o
Thenonnal
speed
o
he
Fork
Lft
Truck
is 7 5
km
hen there
is
no
oad
and
canbe 6
kmIhr
when
loaded
The
maximum
possible
lift
oftheFork
is
nonnally
2 75
m
and
the
weightcarrying
capacity
is
nonnally
restricted
to
within
2
5
to
3
tonnes
The
operation
ofthe
Fork
Lift is
very
simple
and
the
driver
shall
befamiliar
wth the
normal
procedures including
tbe
steering
mechanism
The
DOnna maintenance
procedures
applicable
to
Hydraulic system
Chain
Sprocket
system
are
applicable
forFork
Lift
also
STUDENT
S
GUIDE
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