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Be sure to thoroughly read and understand the SAFETY PRECAUTIONS given in this section before using
the equipment in order to operate the equipment correctly.
The precautionary measures described in this section are intended to prevent danger or damage to you or
to others. The contents of this manual that could possibly be performed improperly are classified into two
categories:
WARNING, and
CAUTION. The categories indicate the extent of possible damage
or the urgency of the precaution. Note however, that what is included under
CAUTION may at times
lead to a more serious problem. In either case, the categories pertain to safety-related items, and as such,
must be observed carefully.
WARNING : Operating the equipment improperly by failing to observe this precaution may possibly
lead to death or injury to humans.
CAUTION : Operating the equipment improperly by failing to observe this precaution may possibly
● NOTE
cause injury to humans and other physical damage.
: Gives information that does not fall in the WARNING or CAUTION categories.
● Explanation
of Symbols:
：The mark indicates a WARNING or CAUTION item. The symbol inside the mark describes the
precaution in more detail ("electrical shock", in the case of the example on the left).
：The mark indicates a prohibited action. The symbol inside the mark, or a notation in the vicinity of
the mark describes the precaution in more detail ("disassembly prohibited", in the case of the
example on the left).
：The mark indicates an action that must be taken, or instructs how to perform a task. The symbol
inside the mark describes the precaution in more detail ("provide ground work", in the case of the
example on the left).
35(&$87,216727+(352'8&763(&,),&$7,216
CAUTION
Do not operate the product under any conditions other than those for which it is specified. Failure to observe the precaution can lead to electrical leakage, electrical
shock, fire, water overflow or other problems.
Frequency
Voltage
35(&$87,216'85,1*75$163257$1',167$//7,21
When transporting the product, pay
close attention to its center of
gravity and mass. Use an appropriate lifting equipment to lift the unit.
Improper lifting may result in the fall
of the product which could cause
damage of the product or human injury.
Electrical wiring should be
performed in accordance with all
applicable regulations in your
country. Imperfect wiring or
neglecting the installation of
proper equipment will cause
electrical leakage or fire.
WARNING
Install the product properly in
accordance with this instruction
manual. Improper installation
may result in electrical leakage,
electrical shock, fire, water
leakage, or injury.
Provide a secure grounding
dedicated for the product. Never
fail to provide an earth leakage
circuit breaker and a thermal
overload relay in your starter or
control panel (Both available on
the market). If an electrical
leakage occurs by due to a
product failure, it may cause
electrical shock.
Use a power outlet that has a sufficient rating and has been exclusively
provided for the pump. If the power outlet is shared with other equipment,
it can lead to an abnormal heat of the outlet and can cause fire as a
result.
Power
Supply
Capacity
CAUTION
Be sure to provide a ground wire
securely. Do not connect the
ground wire to a gas pipe,
water pipe, lightening rod, or
telephone ground wire. Improper
grounding could cause electrical shock.
Prevent a metallic object or dust
from sticking to the power plug.
Adhesion of foreign object to the
plug could cause electrical
shock, short-circuit, or fire.
Do not use the cabtyre cable, power
plug, or power outlet if it is damaged
or it is not closely fitted. Connect
every conductor of the cabtyre cable
securely to the terminals. Failure to
observe this can lead to electrical
shock, short-circuit, or fire.
Do not scratch, fold, twist, make
alterations, or bundle the cable, or
use it as a lifting device. The cable
may be damaged, which may
cause electrical leakage, shortcircuit, electrical shock, or fire.
This pump is neither dust-proof nor
explosion-proof. Do not use it at a
dusty place or at a place where
toxic, corrosive or explosive gas is
present. Use in such places
could cause fire or explosion.
When the product will be carried by
hand, decide the number of persons
considering the mass of the product.
When lifting up the product, do
not attempt to do it by simply
bowing from the waist. Use the
knees, too, to protect your back.
35(&$87,216'85,1*7(6723(5$7,21$1'23(5$7,21
Never try to operate the pump if
somebody is present in the pump
sump. If an electrical leakage
occurs, it can cause electrical
shock.
When changing power connection is
needed to correct the direction of
rotation, be sure to turn off the
power supply (earth leakage circuit
breaker, etc.), and perform the work
after making sure that the impeller
has stopped completely. Failure to
do so may lead to electrical
shock, short-circuit, or injury.
Do not operate the product under
any voltage other than described
on the nameplate with the voltage
variation limit within ±10%. If it is
operated with a generator, it is
strongly suggested not to operate
other equipment with the same
generator. Failure to observe
this caution may cause
malfunction and breakdown of
the product, which may lead to
electrical leakage or electrical
shock.
Do not use the product in a liquid
other than water. Use in oil, salt
water or organic solvents will
damage it, which may lead to
electrical leakage or electrical
shock.
WARNING
Never start the pump while it is
suspended, as the unit may jerk
and could lead to injury.
When inspecting the pump, be sure
to turn off the power supply (earth
leakage circuit breaker, etc.) so that
the pump may not start accidentally. Failure to do so may lead to
a serious accident.
OFF
STOP
CAUTION
Do not touch the product with bare
hands during or immediate after
the operation, as the product may
become very hot during operation.
Failure to observe this caution
may lead to be burned.
Rated
Voltage
For water
only
Do not run the product dry or
operate it with its gate valve
closed, as doing so will damage
the product, which may lead to
electrical leakage or electrical
shock.
OFF
CAUTION
! doing so
will damage the product, which
may lead to electrical leakage or
electrical shock.
!
!
Failure to observe
this caution could cause it to
malfunction or to operate abnormally, which may lead to electrical leakage or electrical shock.
!
"
!#
Deterioration of the insulation
may lead to electrical leakage,
electrical shock, or fire.
%$$
35(&$87,216'85,1*0$,17(1$1&($1',163(&7,21
Absolutely turn off the power
supply or disconnect the plug
before starting maintenance or
inspection. Do not work with wet
hands. Failure to observe these
cautions may lead to electrical
shock or injury.
In case any abnormality (excessive
vibration, unusual noise or odor) is
found in the operation, turn the
power off immediately and consult
with the dealer where it was
purchased or Tsurumi representative. Continuing to operate the
product under abnormal conditions may result in electrical
shock, fire, or water leakage.
WARNING
Do not disassemble or repair any
parts other than those designated
in the operation manual. If repairs
are necessary in any other than
the designated parts, consult with
the dealer where it was
purchased or Tsurumi representative. Improper repairs can
result in electrical leakage,
electrical shock, fire, or water
leakage.
OFF
STOP
OFF
CAUTION
After reassembly, always perform a test operation before resuming use of the
product. Improper assembly can result in electrical leakage, electrical
shock, fire, or water leakage.
Test
operation
35(&$87,217232:(5287$*(
WARNING
In case of power outage, turn off the power supply. The product will resume
operation when the power is restored, which presents serious danger to
people in the vicinity.
power
outage
OFF
27+(535(&$87,21
CAUTION
Never use the product for potable water. It may present a danger to human
health.
Potable
Water
3$571$0(6
([DPSOH
Handle
Hose Coupling
Cabtyre Cable
Mechanical Seal
Lubricant
V-Ring
Shaft Sleeve
Oil Casing
Rear Liner
Impeller
Oil Lifter
Oil Plug
Suction Cover
Strainer Stand
35,257223(5$7,21
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Model
LB-250
LBT-250
LB-480
LBT-480
LB-250A
LB-480A
LBZ-480
Bore
mm
Phase
Starting
Method
kW
Max.Head
m
ft.
0.25
8.8/8.6
28.9/28.2
Output
Capacitor-Run
0.25
50
1
Capacitor-Run
0.48
11.0/12.0
36.1/39.5
0.220/0.240
58.1/63.4
1
Capacitor-Run
8.8/8.6
28.9/28.2
0.190
50.2
50
40
50
50
3
1
1
Direct-on-line
Direct-on-line
0.48
0.25
0.48
0.48
Capacitor-Run
Capacitor-Run
50
1
Capacitor-Run
0.75
LB-800A
50
1
Capacitor-Run
0.75
LBZ-800
10.4
1
3
50
50
3
1
Direct-on-line
Capacitor-Run
11.0/12.0
36.1/39.5
kg
10.4
40
40
WHT
0.190
50.2
8.8/8.6
28.9/28.2
LB-800
LBT-800
Max.capacity
m3/min
GPM
0.190
50.2
0.220/0.240
58.1/63.4
10.0
10.0
11.0
11.0/12.0
36.1/39.5
11.0/12.0
36.1/39.5
0.220/0.240
58.1/63.4
0.220/0.240
58.1/63.4
15.0/18.0
49.0/59.0
0.31
82.0
13.2
15.0/18.0
49.0/59.0
0.31
82.0
13.8
0.75
15.0/18.0
49.0/59.0
0.75
15.0/18.0
49.0/59.0
0.31
82.0
0.31
82.0
11.0
10.4
12.8
13.2
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Hose
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Hose Coupling
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Rope
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Single Phase
L1 L2
L1-Red(Brown)
L2-White(Blue)
Ground
G-Green
(Green/Yellow)
Three Phase
U
U-Red(Brown)
V-White
(Blue or Grey)
G
V
W
G
Ground
G-Green
(Green/Yellow)
W-Black(Black)
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Non-Automatic Circuit
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Non-Automatic Circuit
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U
Capacitor
Red
Blue
L1
V
Black
W
White
L2
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Frame Grounding
Green
(Green/Yellow) Green
White(Blue)
L1
Green
(Green/Yellow)
White
Green
(Green/Yellow)
Ground
Aux.Coil
L1
Black
White
Green
(Green/Yellow)
Ground
Power Supply:
Single-Phase
Red(Brown)
L1
White(Blue)
Triac
L2
Electrode
Green
(Green/Yellow)
Transformer
Circle Thermal Protector Capacitor
Red
White
Frame
Grounding
Green
Level Relay Unit
Triac
Electrode
Ground
Red
Red
Capacitor
Blue
Black
White
Miniature
Frame
Grounding Protector
Aux.
Coil
Main
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L1
White(Blue)
Aux.
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L2
Green
(Green/Yellow)
Ground
Float Switch (Normally open contact)
Red
Red
Capacitor
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Black
White
Frame
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Miniature
Protector
Main
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Aux.
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Automatic Operation Circuit (for float type)
LBZ-800
Power Supply:
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Red(Brown)
Heater
Main
Coil
Transformer
Green
Level Relay Unit
White(Blue)
L2
Coil
Automatic Operation Circuit (for float type)
LBZ-480
Automatic Operation Circuit (for electrode type)
LB-800A
Power Supply: Single-Phase
Red(Brown)
Green
White(Blue)
Main
Coil
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Ground
Black
L2
Capacitor
Heater
White
Frame
Grounding
Frame
Grounding
Power Supply: Single-Phase
Red(Brown)
Power Supply:Single-Phase
L2
Heater
Automatic Operation Circuit ( Level Relay Uint)
LB-250A , LB-480A
Non-Automatic Circuit
LB-800
Circle Thermal Protector
Red
Coil
Black Heater
Black(Black)
Green(Green/Yellow)
Aux.Coil
Miniature Protector
Red(Brown)
White(Blue or Grey) White
Ground
Ground
L1
Circle Thermal
Protector
Power Supply: Three-Phase
Red
Red(Brown)
Power Supply:Single-Phase
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Red
White(Blue)
Coil
Float Switch (Normally open contact)
Circle Thermal Protector
Capacitor
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White
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Aux.Coil
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50
LBT-250
50
LBT-480
LB-800
50
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LBT-800
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Level Relay Unit
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Screw driver
more than one (1) second
The lowest starting level
115mm (LB-250A/480A)
170mm (LB-800A)
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Level Relay Unit
The electrodes of the level relay unit are
submerged, causing the current to operate
the pump.
Level Relay Unit
Pump
Water
Level
Start
Operation
(Drainage)
Drop
Operation
(Drainage)
Drop
Operation
(Drainage)
Drop
Stop
Rise
Start
Operation
(Drainage)
Drop
Electrode
(Detection Time : more than one (1) second)
As the water level drops and the water
surface recedes from the electrodes, the
timer trips to drain water.
(Electrodes open Trips the timer)
The draining of water by the timer lasts
approximately 1 minute.
※ If the water surface comes in contact for more than
one (1) second with the electrodes within 1 minute,
the pump will operate continuously even though the
timer has tripped.
The pump will stop 1 minute later.
※ The pump will also stop after a continuous
dry run, in some cases.
When the water level rises and the water
surface comes in contact for more than one
(1) second with the electrodes, the pump will
restart.
(Detection Time : more than one (1) second)
Condition
[Switch on]
Level Relay
Unit
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Interval
Daily
Monthly
Inspection Item
To be within the rated current
Power supply voltage variation
= within ±10% of the rated voltage
Measuring the insulation resistance Insulation resistance reference value = 1MΩ minimum
[NOTE] The motor must be inspected if the insulation resistance is considerably lower
than the last inspection.
Measuring the operating current
Measuring the power voltage
Inspecting oil 1,000 hours or 6 months, whichever comes first.
Semi-yearly Inspection of liffting rope
Replace if damage, corrosion, or wear has occurred to the rope.
Remove if foreign object is attaching to it.
Changing oil
Yearly
Once every
2 to 5 years
2,000 hours or 12 months, whichever comes first.
Changing the mechanical seal
[NOTE] The inspection and replacement of the mechanical seal requires specialized
equipment. To have this operation performed, contact the dealer where this
equipment was purchased, or the Tsurumi sales office in your area.
Overhaul
The pump must be overhauled even if the pump appears normal during operation.
Especially, the pump may need to be overhauled earlier if it is used continuously.
[NOTE] To overhaul the pump, contact the dealer where it was purchased, or the
Tsurumi sales office in your area.
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Oil Inlet
Packing
Hex Key Wrench
Oil Plug
Specified Oil: Turbine Oil VG32 (non-additive)
Unit : m
Pump Model
Specified
Volume
155
LB-250, LBT-250, LB-250A
LB-480, LBT-480, LB-480A, LBZ-480
LB-800, LBT-800, LB-800A, LBZ-800
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Replacement condition
Part
Mechanical Seal
When oil in oil compartment becomes milky.
Lubricant ; Turbine Oil VG 32 (non-additive)
Every 12 mouths or after 2,000 hours of use, whichever comes first.
Packing, O-Ring
Each time pump is disassembled or inspected
V-Ring
When ring is worn, and each time pump is disassembled or inspected
Shaft sleeve
When it becomes worn
155
155
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Pump Casing
Oil Casing
Packing
Suction Cover
V-Ring
Oil Plug
Shaft Sleeve
Rear Liner
Impeller
Strainer Stand
Plain Washer
Spring Washer
Hex. Bolt
Hex. Cap Nut
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Motor Side
Shaft
V-Ring
Do not apply
oil here
Shaft Sleeve
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Problem
Pump fails to start; or, starts
but stops immediately.
Possible cause
No proper power is supplied
(i.e. power outage).
Plug is not inserted.
Open circuit in cabtyre cable or poor
connection.
Malfunction in float.
Electrode is insulated by debris.
Malfunction in level relay unit.
Pump starts but stops
immediately, causing the
motor protector to trip.
Foreign matter is wedged in the impeller,
causing the motor protector to trip.
The movement of the stop float is
obstructed, causing the start float alone to
perform the start and stop operations.
The voltage is too low.
A 50Hz unit is used at 60Hz.
The pump has been operated for a long
time with its strainer stand clogged.
Malfunction of motor (seizure or water
leakage).
The pump is drawing in too much mud.
The impeller is worn.
The hose is clogged or kinked at its
midspan.
The pumping volume is low.
The strainer stand is clogged or is buried.
The motor rotates in reverse.
A 60Hz pump is used at 50Hz.
Pump generates vibration or noise.
The pump does not stop
automatically.
Countermeasure
Contact the electric power company or an electrical
repair shop.
Connect the plug.
Check whether there is an open circuit in the
cabtyre cable or wiring.
Remove obstacles and check the operation of the
float.
Use sandpaper to remove the debris.
Repair or replace the level relay unit.
Inspect the pump and remove the debris.
Remove obstacles and check the operation of the
stop float.
Provide the rated voltage or use an extension
cable that meets the specifications.
Check the nameplate and replace the pump or the
impeller.
Remove the debris from the strainer stand.
Repair or replace.
Place a concrete block under the pump to prevent
the pump from drawing in excess mud.
Replace the impeller.
Minimize the bends of the hose, and if the pump is
used in a dusty area, place it inside a mesh basket
during operation.
Remove the debris from the strainer stand.Place a
concrete block under the pump to prevent the
pump from drawing in excess mud.
Change the power connection.
Check the nameplate and replace the pump or the
impeller.
Motor bearings are damaged.
Replace the bearings.
The movement of the floats is obstructed.
The switch in a float is faulty.
The water level of the (stop) float is set
lower than the pump's minimum possible
operating water level.
Malfunction in level relay unit
Electrode is shorted by debris.
Influence by electrical device in the vicinity
of the pump.
Remove the blockage. Or, replace the part.
Set the water level of the (stop) float higher than the
pump's minimum possible operating water level.
Repair or replace the level relay unit.
Use sandpaper to remove the debris.
Check whether there are any wires that are tangled
around the electrode. Check whether there are any
electrical devices that could generate
electro-magnetic interference, and relocate the unit
as necessary.
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Product model
Manufacturing number
Purchase date
Remarks
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