2. TSURUMI PUMP
  3. LB-800A

TSURUMI PUMP LB-800A, LB-480A, LB-800, LBT-250, LBT-480 Operating instructions

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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).
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).
: Operating the equipment improperly by failing to observe this precaution may possibly
cause injury to humans and other physical damage.
: Operating the equipment improperly by failing to observe this precaution may possibly
lead to death or injury to humans.
: Gives information that does not fall in the WARNING or CAUTION categories.
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).
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
CAUTION
NOTE
Explanation of Symbols:
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Do not operate the product under any conditions other than those for which it is speci-
fied. Failure to observe the precaution can lead to electrical leakage, electrical
shock, fire, water overflow or other problems.
CAUTION
Frequency
Voltage
WARNING
Power
Supply
Capacity
When transporting the product, pay
close attention to its center of
gravity and mass. Use an appropri-
ate 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.
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.
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.

CAUTION
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, short-
circuit, electrical shock, or fire.
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 electri-
cal shock.
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.
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.
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.
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.
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CAUTION
WARNING
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.
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 acciden-
tally. Failure to do so may lead to
a serious accident.
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 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.
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.
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.
For water
only
Rated
Voltage
STOP

CAUTION
!
!
Failure to observe
this caution could cause it to
malfunction or to operate abnor-
mally, which may lead to electri-
cal leakage or electrical shock.

! doing so
will damage the product, which
may lead to electrical leakage or
electrical shock.
!
"
!#

Deterioration of the insulation
may lead to electrical leakage,
electrical shock, or fire.
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CAUTION
WARNING
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.
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.
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 representa-
tive. Continuing to operate the
product under abnormal condi-
tions may result in electrical
shock, fire, or water leakage.
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 representa-
tive. Improper repairs can
result in electrical leakage,
electrical shock, fire, or water
leakage.
Test
operation
STOP
OFF
OFF
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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.
WARNING
power
outage
OFF
CAUTION
Never use the product for potable water. It may present a danger to human
health.
Potable
Water
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Handle
Hose Coupling
Oil Plug
Oil Lifter
Suction Cover
Strainer Stand
Cabtyre Cable
Mechanical Seal
Lubricant
Shaft Sleeve
V-Ring
Oil Casing
Rear Liner
Impeller
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Bore
mm
Model Output
kW
Phase
Max.capacity
m3/min
GPM
Starting
Method
WHT
kg
40 LB-250 0.25 1 Capacitor-Run 10.4
40 LBT-250 0.25 3 Direct-on-line 10.0
50 LB-480 0.48 1 Capacitor-Run
Capacitor-Run
Capacitor-Run
10.4
50 LBT-480 0.48 3 Direct-on-line 10.0
40 LB-250A 0.25 1 11.0
50 LB-480A 0.48 1 11.0
50 LB-800 0.75 1 Capacitor-Run 13.2
50 LB-800A 0.75 1
Max.Head
m
ft.
8.8/8.6
28.9/28.2
8.8/8.6
28.9/28.2
11.0/12.0
36.1/39.5
11.0/12.0
36.1/39.5
8.8/8.6
28.9/28.2
11.0/12.0
36.1/39.5
15.0/18.0
49.0/59.0
15.0/18.0
49.0/59.0
0.190
50.2
0.190
50.2
0.220/0.240
58.1/63.4
0.220/0.240
58.1/63.4
0.190
50.2
0.220/0.240
58.1/63.4
Capacitor-Run 50 LBZ-480 0.48 1 10.4
11.0/12.0
36.1/39.5
0.220/0.240
58.1/63.4
0.31
82.0
50 LBT-800 0.75 3 Direct-on-line 12.8
15.0/18.0
49.0/59.0
0.31
82.0
0.31
82.0
Capacitor-Run 13.8
50 LBZ-800 0.75 1
15.0/18.0
49.0/59.0
0.31
82.0
Capacitor-Run 13.2
,167$//$7,21
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CAUTION
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CAUTION
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ingle Phase
L1-Red(Brown) G-Green
(Green/Y
ellow)
L2-White(Blue)
L1 L2 G Ground
Three Phase
U-Red(Brown) G-Green
(Green/Yellow)
W-Black(Black)
V-White
(Blue or Grey)
U V W G
Ground
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Non-Automatic Circuit
LB-250 , LB-480
White(Blue)
Power Supply: Three-Phase
Non-Automatic Circuit
LBT-250 , LBT-480 , LBT-800
Red(Brown) Red
Black
White(Blue or Grey)
Black(Black)
White
Green(Green/Yellow)
Green
Frame
Grounding
Ground
Circle Thermal
Protector
Coil
Coil
Coil
Heater
Heater
U
V
W
Red Blue
Black
Capacitor
Aux.Coil
Main Coil
Miniature Protector
Power Supply:Single-Phase
Non-Automatic Circuit
LB-800
Power Supply:Single-Phase
Red(Brown) Red
White
Green
(Green/Yellow) Green
Frame Grounding
Ground
L1
L2
Automatic Operation Circuit ( Level Relay Uint)
LB-250A , LB-480A
Automatic Operation Circuit (for float type)
Automatic Operation Circuit (for float type)
LBZ-480
LBZ-800
Level Relay Unit
Red Red
Ground
Red(Brown)
Black Triac
Black
White(Blue)
White
White
Green
(Green/Yellow)
Green
Frame
Grounding
L1
L2
Blue
Red
Black
Blue
Capacitor
Aux.
Coil
Main
Coil
Miniature
Protector
Transformer
Electrode
Automatic Operation Circuit (for electrode type)
LB-800A
Power Supply: Single-Phase
Level Relay Unit
Red
Ground
Red(Brown)
Black Triac
White(Blue)
White
White
Green
(Green/Yellow)
Green
Frame
Grounding
L1
L2
Capacitor
Aux.
Coil
Main
Coil
Transformer
Electrode
Power Supply: Single-Phase
Power Supply:
Single-Phase
Power Supply:
Single-Phase
Miniature
Protector
Red
Ground
Red(Brown)
White(Blue) White
Green
(Green/Yellow)
Green
Frame
Grounding
Capacitor
Aux.
Coil
Main
Coil
Circle Thermal Protector
Circle Thermal Protector
Float Switch (Normally open contact)
Red
Ground
Red(Brown)
White(Blue) White Heater
Heater
Green
(Green/Yellow)
Green
Frame
Grounding
Capacitor
Aux.Coil
Main
Coil
Circle Thermal Protector
Red
Ground
Red(Brown)
White(Blue) White
Heater
Green
(Green/Yellow)
Green
Frame
Grounding
Capacitor
Aux.Coil
Main
Coil
L1
L2
L1
L2
L1
L2
Float Switch (Normally open contact)
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CAUTION
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Note:
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CAUTION
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COUNTERMEASURE
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Note:
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Interchanging
phases V and W
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COUNTERMEASURE
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COUNTERMEASURE
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Note:
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CAUTION
V
U V G
W
Ground
C.W
.L.
Pump Model C.W.L.
(mm)
LB-250 50
LBT-250 50
LB-480 50
LBT-480 50
50
LBT-800
50
LB-800
UVWG
Ground
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Check float switch operation
Move
Float Switch
115mm (LB-250A/480A)
170mm (LB-800A)
The lowest starting level
In case o
f
f
orced starting
Level Relay Unit
Screw driver
more than one (1) second
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Start
Operation
(Drainage)
Level Relay Unit Pump
Water
Level Condition
Drop
[Switch on]
Operation
(Drainage)
Stop
Operation
(Drainage)
Start
Operation
(Drainage)
Drop
Drop
Rise
Drop
The draining of water by the timer lasts
approximately 1 minute.
(Detection Time : more than one (1) second)
(Electrodes open Trips the timer)
(Detection Time : more than one (1) second)
Level Relay
Unit
Level Relay Unit
Electrode
※
※
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.
The pump will stop 1 minute later.
The pump will also stop after a continuous
dry run, in some cases.
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.
As the water level drops and the water
surface recedes from the electrodes, the
timer trips to drain water.
The electrodes of the level relay unit are
submerged, causing the current to operate
the pump.
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Note:
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Note:
0$,17(1$1&($1',163(&7,21
Interval
Monthly
Daily
Semi-yearly
Inspection Item
Yearly
Once every
2 to 5 years
Measuring the operating current To be within the rated current
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.
Inspecting oil
[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.
1,000 hours or 6 months, whichever comes first.
Changing oil
Changing the mechanical seal
2,000 hours or 12 months, whichever comes first.
Power supply voltage variation
= within ±10% of the rated voltage
Measuring the power voltage
Inspection of liffting rope Replace if damage, corrosion, or wear has occurred to the rope.
Remove if foreign object is attaching to it.
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Note:
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Hex Key W
rench
Oil Plug
Packing
Oil Inlet
Mechanical Seal
Lubricant ; Turbine Oil VG 32 (non-additive)
Packing, O-Ring
Part Replacement condition
V-Ring
Shaft sleeve
When oil in oil compartment becomes milky.
Every 12 mouths or after 2,000 hours of use, whichever comes first.
Each time pump is disassembled or inspected
When ring is worn, and each time pump is disassembled or inspected
When it becomes worn
LB-250, LBT-250, LB-250A
LB-480, LBT-480, LB-480A, LBZ-480
155
155
LB-800, LBT-800, LB-800A, LBZ-800
155
Pump Model Specified
Volume
Unit :
Specified Oil: Turbine Oil VG32 (non-additive)
m
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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.
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.
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.
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.
Replace the bearings. Motor bearings are damaged.
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.
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.
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.
The impeller is worn.
The hose is clogged or kinked at its
midspan.
The strainer stand is clogged or is buried.
The motor rotates in reverse.
A 60Hz pump is used at 50Hz.
Pump fails to start; or, starts
but stops immediately.
Pump generates vibration or noise.
The pump does not stop
automatically.
Problem Possible cause Countermeasure
Pump starts but stops
immediately, causing the
motor protector to trip.
The pumping volume is low.
Remarks
Purchase date
Manufacturing number
Product model
/