OPERATION AND PARTS MANUAL
Submersible Pumps
Model ST4125D
Model ST6125D
Revision #1 (06/12/08)
To find the latest revision of this
publication, visit our website at:
THIS MANUAL MUST ACCOMPANYTHE EQUIPMENT AT ALLTIMES.
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PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
Effective:
January 1st, 2006
Best Deal!
Order via Internet (Dealers Only)
Orderpartson-lineusingMultiquip’sSmartEquipwebsite!
:
If you have an MQ Account, to obtain a
Username and Password, E-mail us at:
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View Parts Diagrams
Order Parts
PrintSpecificationInformation
To obtain an MQ Account, contact your
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
Gotowww.multiquip.comandclickon
to log in and save!
Order Parts
Note: Discounts Are Subject To Change
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Order via Fax (Dealers Only)
:
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Note: Discounts Are Subject To Change
Domestic (US) Dealers Call:
1-800-427-1244
Order via Phone:
Non-Dealer Customers:
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
When ordering parts, please supply:
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Specify Preferred Method of Shipment:
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Dealer Account Number
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UPS/Fed Ex
✓ DHL
Dealer Name and Address
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Priority One
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Truck
Shipping Address (if different than billing address)
Return Fax Number
Applicable Model Number
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Second/ThirdDay
Quantity, Part Number and Description of Each Part
All orders are treated asStandard Orders
andwillshipthesamedayifreceivedprior
to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 3
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NOTES
PAGE 4 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — SAFETY MESSAGE ALERT SYMBOLS
HAZARD SYMBOLS
Rotating Parts
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!
Safety precautions should be followed at all times when
operating this equipment. Failure to read and understand the
Safety Messages and Operating Instructions could result in
injury to yourself and others.
NEVER operate equipment with covers,
This Owner's Manual has been
developed to provide complete
instructions for the safe and efficient
or guards removed. Keep fingers, hands,
hair and clothing away from all moving
parts to prevent injury.
operation of the Multiquip Models ST-
4125D/ST6125D
Submersible
Pumps. Before using these pumps,
ensure that the operating individual
has read and understands all
instructions in this manual.
Accidental Starting
ALWAYS place the power source circuit
breaker or ON/OFF switch in the OFF
position, when the pump is not in use.
SAFETY MESSAGE ALERT SYMBOLS
The three (3) Safety Messages shown below will inform you
about potential hazards that could injure you or others. The
Safety Messages specifically address the level of exposure to
the operator, and are preceded by one of three words: DANGER,
WARNING, or CAUTION.
Sight and Hearing hazard
ALWAYS wear approved eye and
hearing protection, if required.
DANGER
You WILL be KILLED or SERIOUSLY injured if you DO
NOT follow directions.
Respiratory Hazard
WARNING
You CAN be KILLED or SERIOUSLY injured if you DO
NOT follow directions.
ALWAYS wear approved respiratory
protection, if required.
CAUTION
Equipment Damage Messages
Other important messages are provided throughout this manual
to help prevent damage to your submersible pump, other property,
or the surrounding environment.
You CAN be INJURED if you DO NOT follow directions.
Potential hazards associated with the submersible pump's
operation will be referenced with Hazard Symbols which appear
throughout this manual, and will be referenced in conjunction
with Safety Message Alert Symbols.
This submersible pump, other
property, or the surrounding
environment could be damaged if
you do not follow instructions.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 5
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ST-4125D/ST-6125D —RULES FOR SAFE OPERATION
■
NEVER use gas piping as an electrical ground.
WARNING - ReadThis Manual
■
DO NOT place hands or fingers inside pump when pump is
running.
Failure to follow instructions in this manual may lead to serious
injury or even death! This equipment is to be operated by
trained and qualified personnel only! This equipment is for
industrial use only.
■
ALWAYS make certain that the voltage supplied to the pump
is correct. Always read the pump's nameplate to determine
what the power requirements are. The ST-4125D
and ST-6125D submersible pumps require 230 or 460VAC
(three-phase) for normal operation.
The following safety guidelines should always be used when
operating the ST-4125D/ST-6125D Submersible Pump:
■
DO NOT restrict the flow of the discharge hose as it may
cause overheating.
GENERAL SAFETY
■
■
Be careful of discharge whipping under pressure.
■
DO NOT operate or service this equipment
before reading this entire manual.
Make sure pump installation is in accordance with national
and local electrical codes.
■
■
ALWAYS have a qualified electrician perform the pump
■
■
This equipment should not be operated by
persons under 18 years of age.
wiring installation.
ALWAYS mount the control box in a vertical position
protected from the elements.
NEVER operate this equipment without proper protective
clothing, shatterproof glasses, steel-toed boots and other
protective devices required by the job.
■
■
■
NEVER handle pump's AC power cord with wet hands.
NEVER let an extension cord or plug connection lay in water.
NEVER stand in water while AC power cord is connected
to a power source.
■
■
■
■
■
NEVER use a pump with a defective, frayed power cord.
■
■
NEVER operate this equipment when not feeling
Check the power cord on the pump for cuts in the insulation.
well due to fatigue, illness or taking medicine.
NEVER use a extension cord that is frayed or damaged
where the insulation has been cut.
NEVER operate this equipment under the
influence or drugs or alcohol.
ALWAYS make certain that proper extension cord has been
selected for the job.
NEVER attempt to use the power cord as a lifting or lowering
device for the submersible pump.
When raising or lowering of the submersible pump is
required, always attach an adequate rope or lifting device
to the correct lifting point (handle) on the pump.
■
NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to the
equipment and/or injury to user may result.
■
ALWAYS place the pump in an upright position on a platform
before using. The platform will prevent the pump from
burrowing itself on soft sand or mud.
■
■
■
■
Manufacturer does not assume responsibility for any accident
due to equipment modifications.
Whenever necessary, replace nameplate, operation and safety
decals when they become difficult read.
■
■
■
■
NEVER operate pump on its side.
DO NOT allow the pump to freeze in water.
NEVER leave an open pump chamber unattended.
ALWAYS check the machine for loosened threads or bolts before
starting.
The electrical voltage required to operate the pump can
cause severe injury or even death through physical contact
with live circuits. ALWAYS disconnect the electrical power
from the pump before performing maintenance on the pump.
NEVER operate the submersible pump in an explosive
atmosphere or near combustible materials. An explosion or fire
could result causing severe bodily harm or even death.
■
ALWAYS make sure submersible pump is grounded.
■
ALWAYS make sure that electrical circuits are properly
grounded per the National Electrical Code (NEC) and
PAGE 6 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D
—
RULES FOR SAFE OPERATION
Emergencies
local codes before operating pump. Severe injury or death
by electrocution can result from operating an ungrounded
pump.
■
ALWAYS know the location of the nearest fire extinguisher.
■
■
■
ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using
submersible pump.
ALWAYS check pump oil level only when pump is cool.
Expansion due to heat may cause hot! oil to spray from the oil
plug when the oil plug is removed.
DO NOT attempt to thaw-out a frozen pump by using a torch
or other source of flame. Application of heat in this manner
may heat the oil in the seal cavity above the critical point,
causing pump damage.
■
ALWAYS know the location of the nearest and first aid kit.
■
■
DO NOT pump water greater than 104 degrees Fahrenheit.
Also DO NOT pump liquids containing acid or alkali.
ALWAYS check strainer before pumping. Make sure strainer
is not clogged. Remove any large objects, dirt or debris from
the strainer to prevent clogging.
■
■
ALWAYS use a large basket strainer when pumping water
that contain large debris.
■
In emergencies always know the location of the
nearest phone or keep a phone on the job site.
Also know the phone numbers of the nearest
ambulance, doctor and fire department. This
information will be invaluable in the case of an
emergency.
ALWAYS flush pump after use when pumping water
concentrated with heavy debris. Flush with clean fresh
water. It is very important to always flush the pump before
turning it off to prevent clogging.
■
■
ALWAYS store equipment properly when it is not being used.
Equipment should be stored in a clean, dry location out of the
reach of children.
ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
Maintenance Safety
■
NEVER lubricate components or attempt service on a running
machine.
■
ALWAYS allow the machine a proper amount of time to cool
before servicing.
■
■
Keep the machinery in proper running condition.
Fix damage to the machine immediately and always replace
broken parts.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 7
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ST-4125D/ST-6125D —DIMENSIONS
13.5 in
(343 mm)
11 in
(279 mm)
13.5 in
(343 mm)
39 in
(991 mm)
33.5 in
(851 mm)
ST-4125D
ST-6125D
SUBMERSIBLE
PUMP
SUBMERSIBLE
PUMP
11.75 in
(298 mm)
11.75 in
(298 mm)
ST-4125D
ST-6125D
Figure 1. Submersible Pump Dimensions
PAGE 8 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D —SPECIFICATIONS
TABLE 1. SPECIFICATIONS
Model
ST-4125D
ST-6125D
Type
Centrifugal Submersible Pump Centrifugal Submersible Pump
Impeller
Cast Ductile Iron
2.00 in. (51 mm)
Cast Ductile Iron
2.00 in. (51 mm)
Suction & Discharge Size
464 gallons/minute
(1,756 liters/minute)
610 gallons/minute
(2,309 liters/minute)
Maximum Pumping Capacity
Max Head
Power
125 ft. (38 meters)
10 HP (7.5 kw)
230/460 3Ø
125 ft (38 meters)
15 HP (11 kw)
230/460 3Ø
Voltage/Phase
149 (230V)
75 (460V)
215 (230V)
108 (460V)
Starting Amps
Running Amps
27 (230V)
14 (460V)
39 (230V)
19.7 (460V)
Control Box Required
Power Cable Length
Dry Net Weight
Height
See Note 3
50 ft. (15.2 m)
330 lb (150 kg)
32.7 in (83.1 cm)
14.2 in (36 cm)
See Note 3
50 ft. (15.2 m)
390 lb (177 kg)
38.8 in (98.6 cm)
14.2 in (36 cm)
Diameter
1. Motor Rotation – Upon start-up, the pump "kicks" in the opposite direction of motor rotation. The correct rotation is
counterclockwise (CCW) as viewed from the impeller end of the pump.
2. Mechanical Seal Oil – Use a good grade 10 weight non-detergent hydraulic oil (i.e.ShellTurbo 32 or equivalent).Fill oil cavity
75% to 85% full (allow air space for expansion).
3. Control Box - Control box (Table 2) is required for use to provide thermal overload protection to the pump.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 9
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ST-4125D/ST-6125D —GENERAL INFORMATION
The Multiquip Model ST-4125D and ST-6125D submersible
The mechanical seal of these pumps operates within an oil-
filled chamber that provides positive lubrication. This helps
prevent damage in the event the pump is run dry for short periods
of time.
pumps are designed to pump water. These pumps work best
when faced with high head applications where you need an
appreciable flow.
The ST-4125D and ST-6125D submersible pumps have dual
voltage, easily switched between 230 and 460 volts.
These pumps have a heavy-duty cast iron body that is very
durable and able to withstand rough handling. The ST-4125D
comes with NPT threads for standard hose connections while
the ST-6125D is equipped with 6-inch flange fittings.
PAGE 10 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D —SUBMERSIBLE PUMP COMPONENTS
6
5
4
5
6
4
3
3
ST-4125D
ST-6125D
SUBMERSIBLE
PUMP
SUBMERSIBLE
PUMP
2
2
7
7
1
1
8
8
ST-6125D
ST-4125D
Figure 2. Submersible Pump Components
Figure 2 shows the location of the basic components, for
the ST-4125D and ST-6125D submersible pumps.Listed below
is a brief explanation of each component.
5
.
AC Power Cable – These pumps are supplied with a
50 ft. (15.2 meters) AC power cable. Always check the
cable for signs of wear. NEVER use a defective power
cable. Replace the cable immediately if the cable is
worn or defective.
1. Strainer Base – This strainer base is made of stainless
steel which is resistant to hardware corrosion. For
dewatering purposes, always place the strainer base
on a platform.
6. Eye Bolts – Always lift the submersible pump by the
eye bolts using a chain and lifting device capable of
lifting about 400 lbs. NEVER lift the pump by its power
cord! Lifting the pump by the power cord will cause
undue stress on the cord and ultimately the cord will
become dislodged from the pump.
2. Volute/Impeller – Impellers are constructed of cast
ductile iron to minimize wear and prolong service life.
3. Electric Motor –The ST-4125D pump utilizes a 60 Hz,
three-phase, 230/460 VAC, 10 HP electric motor and
the ST-6125D pump utilizes a 60 Hz, three-phase, 230/
460VAC, 15 HP electric motor.Consult with a licensed
electrician before connecting motor to a power source.
Observe all city and local safety codes.
7. Mechanical Seal Oil – This oil-filled seal provides
lubrication when running the pump dry.NEVER run the
pump dry! Running the pump dry will cause severe
damage to the pump.
8. Mechanical Seal Oil Plug – Remove this plug to
check and add hydraulic oil (Shell 32 or equivalent) to
the oil cavity. This oil protects the mechanical seal. Oil
cavity should be full enough to cover seal spring.
4. Discharge Port – Connect a 4-inch hose (ST-4125D)
or 6-inch hose (ST-6125D) to this port. Remember to
adequately support the discharge hose to avoid stress
on the pump.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 11
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ST-4125D/ST-6125D — FLOAT SWITCHES
Float Switch Theory
Float Switch (Dual)
There is a tilt-sensitive mercury switch hermetically sealed within
each float. As the liquid level (water) rises or falls, the float changes
its angle until the mercury switch makes (close) or breaks (open)
the circuit.
Float switches (Figure 3) are used for the unattended operation
of the submersible pump.The ST-4125D and ST-6125D pumps
require the use of a control box to perform this function. Shown
in Figure 3 is an example of a dual float control switch application.
The length of cord between the float and point of attachment
determines the amount of water to be pumped.
The Models ST-4125D and ST-6125D submersible pumps
require one each of the Model SW-1WOPA float type mercury
switches.These switches have a pumping range level between
5.5~18 feet (1.67~5.5 meters). All float switch connections are
bare wire (no plug). The ST-4125D/ST-6125D uses the CB12
control box for 230V and the CB14 control box for 460 V
when float switches are required for the job application.
Contact Multiquip sales department to order float switches.
EXTERNAL 3-PHASE
(230 OR 460 VOLT)
POWER SOURCE
CIRCUIT
BREAKER
L1
RED
WHITE
BLACK
L2
L3
GROUND
CONTROL
BOX
CAUTION!
HIGH
VOLTAGE!
RESET
CB12/14
LIFTING
CHAIN
4 or 6-INCH
DISCHARGE
HOSE
POWER
CORD
PUMP
ON
FLOAT
SWITCHES
PUMP
OFF
SUPPORT
PLATFORM
ST-6125D
SUBMERSIBLE
PUMP
Figure 3. Dual Float Control Switch
PAGE 12 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — CONTROL BOXES
Control Boxes
Control boxes (Figure 4) are required for remote control
and thermal shutdown capability for the submersible
pump.
CAUTION!
HIGH
VOLTAGE!
These water-resistant control boxes provide electronic overload
protection, watertight housing and glands to prevent water from
leaking into the box, and a float switch interface.
OFF
Refer to Table 2 for the control box model that meets your
pumping requirements.
MAN
AUTO
Contact Multiquip sales department to order control boxes as
listed in Table 2.
RESET
CB12/14
ALWAYS have a qualified
licensed electrician perform the
installation of the control box.
NOTE
Figure 4. Electrical Control Box
(Model CB12/14)
Table 2. Control Box Specifications
Thermal
Overload
Protection Capability
Float
Switch
Control Box
Model No.
Used With
Pump Model
Heater
Size
Full Load UL/CSA
VoltageType
Amps
Listed
YES
YES
YES
YES
230 VAC
Three-Phase
CB12
CB12
CB14
CB14
ST-4125D
ST-6125D
ST-4125D
ST-6125D
K67
K73
K56
K62
27
YES
YES
YES
YES
YES
YES
YES
YES
230 VAC
Three-Phase
39
460 VAC
Three-Phase
14
460 VAC
Three-Phase
19.7
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 13
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ST-4125D/ST-6125D — CONTROL BOX INSTALLATION
POWER CORD REQUIREMENTS
DANGER - Hazardous Voltage
To place the ST-4125D/ST6125D
submersible pumps into operation
requires the use of a control box.The
When routing the three phase power via a power cord to the
controlbox,ALWAYSusethecorrectwiresize.Pleasereference
Table 3 below (Cord Length and Wire Size) to determine the
correct wire size. Incorrect wire size can adversely affect the
performanceofthepump.
control box contains the necessary
electronics (thermal overload module,
float switch connections and 230/460
voltage transformer) to operate the
pump. Remember this control box
TABLE 3. CORD LENGTH AND WIRE SIZES
contains hazardous voltages. Disconnect all sources of
power before installing or servicing. There exists the
possibilityofelectrocution, electricshockorburn, whichcan
cause severe bodily harm or even death!
AMPS
6
50 FT.
100 FT.
16 AWG
14 AWG
14 AWG
14 AWG
12 AWG
12 AWG
150 FT.
14 AWG
12 AWG
12 AWG
12 AWG
10 AWG
10 AWG
16 AWG
16 AWG
16 AWG
14 AWG
14 AWG
12 AWG
8
CAUTION - Installation
10
12
14
16
This control box should only be installed or serviced by a
licensed electrician or qualified personnel.
CONTROL BOX MOUNTING
Mountthecontrolboxinanuprightverticalposition.Makesure
the control box is securely fastened to a flat surface, that is free
of dust, dirt, moisture or any elements that may contaminate or
erode the electronic components of the control box.
FLOAT SWITCH INSTALLATION
1. Remove the float switch input connector housing, then
route the float switch wires through the cable gland on the
control box. Attach the wires to the float switch terminal
block as indicated by Table 4. Refer to Figures 7 and 8.
3-Phase Power Installation (Input)
The ST-4125D/ST6125D submersible pump requires 230/
460V3-phasepowerfornormaloperation.Thepumpisshipped
from the factory in the 230 VAC configuration. To change the
voltagesettingfrom230 VACto460VACrefertothe230/460VAC
Selectionsection.
TABLE 4. FLOAT SWITCH CONNECTIONSS
If you cannot determine what your pump's power
requirements are, look at the vendor supplied identification
name tag attached to the pump or please contact Multiquip's
Service/Technical Assistance department.
FLOAT SWITCH TERMINAL
FLOAT SWITCH
BLOCK NUMBER
START
STOP
TERMINALS 1 AND 2
TERMINALS 3 AND 4
CAUTION - Voltage Phasing
Applying incorrect power (voltage phasing) to the
submersible pump can cause severe damage to the pump.
Please make sure that the correct voltage and phase are
transferred to the pump at all times.
2. Tighten the connector housing to ensure a tight fit between
the cord and the connector body.This will prevent the cable
from pulling out of the terminal block and also prevent
moisture from entering the control box.
3. Determine the length of the float switch wires, then secure
float switch wires to pump discharge hose.
PAGE 14 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — 230/460VACVOLTAGE SELECTION
230/460VACVoltage Selection
5. Remove the sleeving covering the large red wire and
separate the 2 wires labeled 1 and 7.
The ST-4125D/ST-6125D submersible pump is factory set
at 230 VAC. To change the voltage from 230 VAC to 460
VAC, perform the following (refer to Figure 5):
6. Connect the wire labeled 4 from step 4 to the wire labeled
7 from step 5 and join them with the large red wire. Cover
the wires with sleeving.
1. Place pump in a suitable area free of dirt and debris.
2. Remove the four retaining screws, using a 19 mm socket,
and the two Allen screws using an 8 mm socket, that secure
the pump casing.
7. Repeat steps 5 and 6 for the large black wire and the large
white wire. Refer to the table in Figure 5 for wires to separate
(column 2) and wires to connect (column 4).
3. Lift the top of the pump by attaching a chain on the eye
bolts and using a crane or similar equipment. Be careful
not to fully stretch the cable connections inside the pump.
8. Using electrical tape, bind the 3 wires that were separated
and disconnected (labeled 1, 2, and 3). Place these wires
neatly inside the housing.
4. Cut the tie-wrap holding the 460VAC motor winding wires
as shown in Figure 5.Then remove the protective covering
from the wires (labeled 4, 5, and 6).
9. Reinstall the top of the pump and reinsert the six screws
and tighten securely.
BLACK
WHITE
CUT
TIE-WRAP
(SMALL)
(SMALL)
WHITE
(LARGE)
BLACK
CONNECT
BLACK
(SMALL)
TO GROUND
SCREW IN
UPPER CASING
RED
GREEN
REMOVE PROTECTIVE
COVERING TO GAIN
ACCESS TO 460 VAC
WIRES 4, 5, AND 6.
460 VAC
MOTOR
WINDINGS
4
5
6
4
5
6
9
230/460 VAC
MOTOR
8
REMOVE SLEEVING
WINDINGS
COMMON
7
2
9
1
8
3
7
1
2
3
230 VAC
MOTOR
WINDINGS
460 VAC
(HIGH VOLTAGE)
U
X
7
230 VAC
(LOW VOLTAGE)
W
U
9
7
X
Z
Y
8
9
Z
Y
MOTOR
WINDING
STAR WITH
NEUTRAL
MOTOR
WINDING
STAR WITH
NEUTRAL
W
V
8
V
MOTOR WINDING CONFIGURATION
MOTOR
WINDINGS
MOTOR
WINDINGS
230 VAC
INPUT 3Ø
460 VAC
INPUT 3Ø
U (RED)
1 AND 7
U (RED)
4 AND 7
V (WHITE)
W (BLACK)
V (WHITE)
W (BLACK)
2 AND 8
3 AND 9
5 AND 8
6 AND 9
PUMP IS SHIPPED FROM THE FACTORY FOR 230 VAC OPERATION.
FOR 460 VAC OPERATION SEE ABOVE WIRING ILLUSTRATION AND TABLE.
NOTE
Figure 5. 230/460 VAC Pump Voltage Selection
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 15
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ST-4125D/ST-6125D — CONTROL BOXWIRING DIAGRAM
THREE PHASE WIRING
EXTERNAL 3-PHASE
(230 OR 460 VOLT)
POWER SOURCE
CB-12/CB-14
CONNECTIONS
POWER
INPUT
M
O/L
CIRCUIT
BREAKER
RED AWG 8
BLK
L1 L1
T1
L1
RED
WHITE
BLACK
PUMP GRN
MOTOR
RED AWG 8
RED AWG 8
RED
WHT
T2
T3
L2 L2
L3 L3
L2
L3
H1
H3
H2
H4
SEE TABLE 2
FOR CORRECT
HEATER SELECTION
CONTROL
TRANSFORMER
50VA CPT
GROUND
F1
WHT
X2
XF
X1
FUSE
1/2 AMP
GRN
OVERLOAD
RELAY
MAN
2
4
1
BLK
OFF
O/L
AUTO
X2
NC
ON
INDICATOR
LAMP
WHT
AWG 10
RED
AWG 10
G
CONTACTOR
5 HP
NO
RED
AWG 10
4
WHT AWG 10
3
M
A1
A2
RED
AWG 10
TERMINAL
BLOCK
1
4
3
2
STOP
FLOAT
SWITCH
START
FLOAT
SWITCH
SELECTABLE 230 OR 460 VAC
VOLTAGE INPUTS
L1
L2
L1
L2
F U S E
230V INPUT
460V INPUT
X 1
X F
X 2
JUMPER
T R A N S F O TR M AE BR
1 2 0
1 1
1 1
5
X 1
0
H4
H2
H3
H1
H2 H4
H3
H2
H4
H1
H1 H3
CB-12
CB-14
Figure 7. Control Box Wiring Diagram
PAGE 16 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — 3-PHASE POWER INSTALLATION
3-PHASE POWER INSTALLATION (OUTPUTTO PUMP)
3-PHASE POWER CORD (INPUTTO BOX) INSTALLATION
1. The three phase output power cord should have four wires.
Each wire is color coded. The colors are RED, WHITE,
BLACK and GREEN.
1. The three phase input power cord should have four wires.
Each wire is color coded. The colors are RED, WHITE,
BLACK and GREEN.
2. Remove the 3-phase AC output power connector housing
on the control box, then route the three phase output power
cable through the cable gland on the control box. Attach
the wires to the AC terminal blocks on the overload relay
as indicated by Figure 8.
2. Remove the 3-phase AC input connector housing from the
control box, then route the three phase input power cable
through the cable gland on the control box. Attach the
wires to the AC terminal block inside the control box as
indicated by Table 5 and Figure 8.
TABLE 5. 3-PHASE AC INPUT POWER CONNECTIONS
S
Electrical connections to the power
source should only be performed by
a licensed electrician or qualified
personnel.
NOTE
CABLE WIRE COLOR
AC TERMINAL BLOCK #
RED
L1
L2
WHITE
BLACK
GREEN
L3
GROUND
3. Tighten the connector housing to ensure a tight fit between
the power cord and the connector body. This will prevent
the cable from pulling out of the terminal block and also
prevent moisture from entering the control box.
It is recommended that the power being supplied to the control
box ALWAYS be connected to a circuit breaker or a quick
disconnect switch.Thissafetyfeatureallowsforquickremoval
of power from the control box in the event of an emergency.
4. Connect the other end of the 3-phase input power cord to
the voltage source. Remember to provide a means of
disconnecting the power from the control box (circuit breaker
or quick disconnect switch). Also make sure to provide a
good earth ground to the control box.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 17
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ST-4125D/ST-6125D — 3-PHASE POWER INSTALLATION
MOUNT CONTROL
BOX IN AN UP-LEFT
VERTICAL POSITION
AS SHOWN.
1L1
5L3
3
L2
1-
2-
3-
4-
CONTROLLER
F
N
M
-
-3
TRANSFORMER
F U S E
U E D L - E L E
F
S U
-4
AC POWER
TERMINAL BLOCK
1-
2-
3-
4-
OFF/ON
LAMP
2T1
4T2
6T3
AEG
6
1
3
0
1
3
MANUAL/AUTO
SWITCH
/
L
LL
22
L
2
0
1
3
5
0
-
0
FLOAT SWITCH
TERMINAL BLOCK
2
R
E
S
E
T
M
A
I
OVERLOAD
RELAY
N
T
R
I
P
EXTERNAL 3-PHASE
(230 OR 460 VOLT)
POWER SOURCE
4
3
2
1
T
1
T
T
L1 L2
RED
L3
2
3
BLK
BLACK
HEATER
SEE TABLE 2
CIRCUIT
BLK
RED
WHT
BREAKER
WHITE
L1
RED
GRN
WHITE
BLACK
GRN
L2
L3
GROUND
3 PHASE
AC OUTPUT
POWER CABLE
FLOAT
SWITCH
INPUTS
3 PHASE
AC INPUT
POWER CABLE
1.SECURE FLOAT SWITCH
WIRES TO PUMP
DISCHARGE HOSE
2. START FLOAT
SWITCH. CONNECT
TO TERMINALS 1 AND 2
3. STOP FLOAT
SWITCH. CONNECT
TO TERMINALS 3 AND 4
PUMPING
RANGE
WARNING
INSTALLATION OF THIS CONTROL
BOX IS TO BE PERFORMED ONLY BY
A LICENSED ELECTRICIAN OR
QUALIFIED PERSONNEL.
ST-6125D
SUBMERSIBLE
PUMP
Figure 8.Three Phase
Control Box/Pump System Diagram
PAGE 18 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — SETUP
ControlBoxSetup
Reset
1. From the voltage source set the circuit breaker or quick
1. When the overload module detects an overload, the unit
will shut down. Check the unit and remove cause of overload.
disconnect switch to the ON position.
2. For manual operation of the pump, place the 3-position
operation switch (Figure 9) on the control box in the
MANUAL position.
2. Let the unit cool down and press the RESET button (see
Figure 12) on the front of the control box to reset the unit
(restore power).
Figure 9. Manual-Off-Auto SW. (Manual Position)
Figure 12. RESET Button
Shut-Down
3. Verify that the ON indicator (Figure 10) on the control box
is LIT.This means that power is being supplied to the control
box.
1. Place the 3-position operation switch on the control box to
the OFF position (Figure 13).
Figure 10. Control Box Power ON Indicator
4. In the manual mode the pump will run continuously. Pay
close attention when running the pump in this mode.
DAMAGE to the pump may occur if pump is not immersed
in water.
Figure 13. Manual-Off-Auto SW. (OFF Position)
2. Verify that the control box power ON light is OFF.
3. Turn the circuit breaker or quick disconnect switch to the
5. To operate the pump automatically (float switches), place the
OFF position.
3-position operation switch in the AUTO position (Figure 11).
Figure 11. Manual-Off-Auto SW. (Auto Position)
6. In the AUTO mode the pump will run as long as there is a
sufficient amount of water.This amount is determined by
the setting of the float switches. The stop float switch
contacts will open when the water level is low and power
will be removed from the pump's motor.
Once the water level has risen back to the appropriate
level the start float switch contacts will close and power
will be restored to the pump's motor.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 19
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ST-4125D/ST-6125D —OPERATION
Operation
2. Makesurethepumpisalwaysplacedinanuprightposition,
not tilted (Figure 15). Never position the pump directly on a
soft,loosebottom.Remembertoattainmaximumpumping
capacityandpreventexcessivewear, positionthepumpso
it will not burrow itself into sand or clay.
1. Attachasuitableliftingchaintotheeyebolts(Figure14)on
thepumpandusingacrane,orsimilarequipment,lowerthe
pump into place. For applications where there is an exces-
siveamountofmud,gritorsilt,theuseofasupportplatform
isdesirable.
LIFTING
CONNECT
CHAIN
TO CONTROL
BOX
POWER
CORD
4 or 6-INCH
DISCHARGE
HOSE
SUPPORT
PLATFORM
ST-6125D
SUBMERSIBLE
PUMP
Figure 14. Placing the Submersible Pump
(Correct Upright Position)
Figure 15. Incorrect Tilted Position
3. After the pump has been positioned correctly into place,
power can be applied to the pump's electric motor.
CAUTION - Pump Use
DO NOT use this pump for swimming pool applications!
PAGE 20 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D —OPERATION
4. NEVERgrabortouchalivepowercord (Figure16)withwet
hands,thepossibilityexistsofelectricalshock,electrocu-
tion and even death.
Pump Shut-Down/Clean-up
1. Remove the power from the pump by turning off the circuit
breakerorswitchthatprovidespowertothepump.Remem-
bertomakesurethathandsaredry(notwet),andfeetarenot
standinginwaterwhenremovingdisconnectingpowerfrom
thepump.
WET
HANDS
2. Using the chain and lifting crane, lift the pump up from its
current position. Remove the discharge hose from the dis-
charge port on the pump.
3. Removeallpowercablesandfloatswitchesfromthecontrol
box. Placecablesandfloatswitchesinasuitablecontainer
where they will not get damaged.
POWER
CORD
(POWER ON)
4. Ifthepumpwasusedtopumpmud,gritorsilt,flush vigorously
with clean water.
5. Removethepumpfromthewater.Wipeoffanymudordebris
that might have attached itself to the pump.
Figure 16. Power Cord (Wet Hands)
6. Store pump in a clean dry place away from dirt and debris.
DANGER - Electrocution Hazard
NEVER grab or touch a live power cord. DO NOT stand in
water when connecting the pump's power cord into a voltage
source.The possibility exist of electrical shock, electrocution
and possibly death!
3. If all of the pump's electrical requirements have been met,
insert the power plug on the pump into the power source
receptacle.
4. Waitafewsecondsandwatershouldbegintoflowfromthe
dischargehose.
5. Ifwaterisnotflowingfromthedischargehoseornotflowing
freelyafterafewminutes,removethepowerfromthepump
and check the system for leaks.
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 21
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ST-4125D/ST-6125D
—
MAINTENANCE
LUBRICATION
5. If oil level is low fill with SAE 10 weight non-detergent
hydraulicoil(i.e.ShellTurbo32 orequivalent). Filloilcavity
75% to 85% full (allow air space for expansion). Pump oil
cavity capacity is approximately 180 cc.
To check the oil level of the mechanical seal perform the
following:
1. Lay the pump (Figure 17) on its side with the oil plug facing
upwards.
IMPELLER
1. Make sure the clearance between the impeller and the
frictiondiskisapproximately.012-.020inches(.304-.508
mm.)
2. Remove oil fill plug.
3. Visually inspect oil plug hole to verify that oil cavity is full
enoughtocoversealspring.Checkevery300hours,change
hydraulic oil every 6 months (1,000 hours) or as needed.
2. Ifimpellerisdefectiveorbadlyworn,replaceimpellerimme-
diately.
4. While checking the hydraulic oil level, also check the
condition of the hydraulic oil in the seal cavity . Block the
opening with a finger and roll pump to one side to drain
oil into a small transparent container.If oil is cloudy or has
water in it, drain oil from pump cavity and replace hydrau-
lic oil. Check the seal for wear damage.
REMOVE FILL PLUG, AND
VISUALLY INSPECT THAT
OIL CAVITY IS FULL ENOUGH
TO COVER SEAL SPRING.
FILL TO 75-80% CAPACITY
(APPROXIMATELY 180 CC.)
FILL WITH 10 WEIGHT NON-
DETERGENT HYDRAULIC
OIL. USE SHELL TURBO 32
OR EQUIVALENT.
LAY PUMP FLAT
ON ITS SIDE
CHECK HYDRAULIC OIL
EVERY 300 HOURS. CHANGE
EVERY 6 MONTHS OR AS
NEEDED.
Figure 17. Checking Hydraulic Oil
PAGE 22 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D —TROUBLESHOOTING
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a
breakdown, useTable 6 (PumpTroubleshooting) as a basic guideline for troubleshooting the pump. If the problem cannot be
remedied, contact Multiquip's service department.
TABLE 6. PUMP TROUBLESHOOTING
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
Check that proper voltage (230/460 3Ø) is being supplied to the pump.
Also check that there is an adequate amount of current (amps) to run
the pump. Check power source circuit breaker.
Incorrect voltage/amps?
If using float switches check wiring, inspect power cord.
Replace fuse, check cause of blown fuse.
Check electrical connections?
Blown power fuse?
Pump Fails To Start
Disconnect power cord and check for clogging and improper impeller
clearance. Unclog pump. Check overload protection device.
Impeller locked?
Use multimeter to check motor insulation. Insulation resistance must
be approximately 15 megaohms. If resistance is low, disassemble
pump motor and bake windings to dry them.
Wet motor windings?
Defective motor and pump
bearings?
Check for excessive bearing wear, if worn replace bearings. Replace
motor if defective.
Twisted or restricted discharge
hose?
Lay hose flat un-kinked. Remove clog from hose line.
Clean strainer.
Clogged pump strainer?
Pump Fails to Deliver
Full Output
Use a voltmeter to check voltage while pump is energized. Voltage
must be within 10%. Check power source (no load and load). If an
extension cord is used, make sure it has adequate current-carrying
capacity for the required length.
Low voltage?
Impeller worn?
Replace impeller.
Replace water seal.
Tighten securely.
Defective water seal?
Loose Oil Fill Plug?
Water in Seal Oil
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 23
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ST-4125D/ST-6125D — PERFORMANCE CURVES
ST4125D Performance Curve
140
120
100
80
60
40
20
TOTAL HEAD
Max 125 ft
CAPACITY
Max 464 G.P.M
Capacity(US.G.P.M)
0
100
200
300
400
500
600
ST6125D Performance Curve
140
120
100
80
60
40
20
TOTAL HEAD
Max 125 ft
CAPACITY
Max 610 G.P.M
Capacity(US.G.P.M)
0
100
200
300
400
500
600
Figure 18. Pump Performance Curves
PAGE 24 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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NOTES
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 25
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EXPLANATION OF CODE IN REMARKS COLUMN
The following section explains the different symbols and
QTY. Column
remarks used in the Parts section of this manual. Use the help
numbers found on the back page of the manual if there are any
questions.
Numbers Used - Item quantity can be indicated by a
number, a blank entry, or A/R.
A/R (As Required) is generally used for hoses or other parts
that are sold in bulk and cut to length.
The contents and part numbers listed in the parts section are
subject to change without notice. Multiquip does not
guarantee the availibility of the parts listed.
A blank entry generally indicates that the item is not sold
separately. Other entries will be clarified in the “Remarks”
Column.
REMARKS Column
Sample Parts List:
Some of the most common notes found in the “Remarks”
Column are listed below. Other additional notes needed to
describe the item can also be shown.
NO. PART NO. PART NAME
QTY. REMARKS
1
2
2
3
4
12345
BOLT ...................... 1 ......INCLUDES ITEMS W/
WASHER, 1/4 IN. .............NOT SOLD SEPARATELY
WASHER, 3/8 IN. ... 1 ......MQ-45T ONLY
HOSE ................... A/R ....MAKE LOCALLY
BEARING ............... 1 ......S/N2345B AND ABOVE
*
*
*
12347
12348
12349
Assembly/Kit - All items on the parts list with the same
unique symbol will be included when this item is purchased.
Indicated by:
“INCLUDES ITEMS W/(unique symbol)”
NO. Column
Unique Symbols - All items with same unique symbol
Serial Number Break - Used to list an effective serial
number range where a particular part is used.
( , #,
+
, %, or >) in the number column belong to the same
*
assembly or kit, which is indicated by a note in the “Remarks”
column.
Indicated by:
“S/N XXXXX AND BELOW”
“S/N XXXX AND ABOVE”
“S/N XXXXTO S/N XXX”
Duplicate Item Numbers - Duplicate numbers indicate
multiple part numbers are in effect for the same general
item, such as different size saw blade guards in use or a
part that has been updated on newer versions of the same
machine.
Specific Model Number Use - Indicates that the part is
used only with the specific model number or model number
variant listed. It can also be used to show a part is NOT
used on a specific model or model number variant.
When ordering a part that has more than one
item number listed, check the remarks column
for help in determining the proper part to order.
Indicated by:
“XXXXX ONLY”
“NOT USED ON XXXX”
“Make/Obtain Locally” - Indicates that the part can be
purchased at any hardware shop or made out of available
items. Examples include battery cables, shims, and certain
washers and nuts.
PART NO. Column
Numbers Used - Part numbers can be indicated by a
number, a blank entry, orTBD.
“Not Sold Separately” - Indicates that an item cannot be
purchased as a separate item and is either part of an
assembly/kit that can be purchased, or is not available for
sale through Multiquip.
TBD (To Be Determined) is generally used to show a part
that has not been assigned a formal part number at time of
publication.
A blank entry generally indicates that the item is not sold
separately or is not sold by Multiquip. Other entries will be
clarified in the “Remarks” Column.
PAGE 26 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D/ST-6125D — SUGGESTED SPARE PARTS
ST-4125D/ST-6125D
SUBMERSIBLE PUMP 1 TO 3 UNITS
Qty.
1
P/N
Description
Remarks
ST4125D
ST6125D
1027620
1027622
KIT, MECHANICAL SEAL, SLEEVE, O-RINGS
KIT, MECHANICAL SEAL, SLEEVE, O-RINGS
1
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 27
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ST-4125D — SUBMERSIBLE PUMP ASSY.
ST-4125D SUBMERSIBLE PUMP ASSY.
1
3
2
50
4
6
19
5
MECHANICAL
SEAL, SLEEVE,
O-RINGS KIT
18
46
28
33
20
27
7
29
32
36
30
23
22
43
21
16
9
11
10
44
49
8
31
17
12
13
34
35
14
45
42
15
41
37
25
48
47
40
38
26
39
PAGE 28 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-4125D — SUBMERSIBLE PUMP ASSY.
ST-4125D SUBMERSIBLE PUMP ASSY.
NO
PART NO
PART NAME
QTY.
1
1
2
1
1
7
1
1
1
4
1
1
1
4
1
1
2
1
4
1
1
1
3
1
3
1
6
1
1
1
3
1
1
1
1
2
1
6
1
1
4
1
2
1
2
1
1
1
REMARKS
1
1025754
CABLE, POWER, 22 MM 50'
CABLE GLAND, DIA.38
BOLT, M12X25L
2
1042600
3
ST4125D031
1040546
4
CABLE BUSH, DIA.34
CABLE ENTRY ASSY.
BOLT
MOULDING TUBE
VOLUTE, HOUSING
BOLT, M12X40L
O-RING, DIA.35X190
LOWER PACKING
IMPELLER
5
1042601
6
ST4125D061
1042602
7
8
1042604
9
ST4125D0201
ST4125D0204
1042605
10#
11
12
13
14
15
16#
17
18
19
20#
21
22
23
25
26
27
28
29#
30
31
32
33#
34
35
36
37
38
39
40#
41
42
43
44
45
46
47
48
49
50
1042607
1042608
ST4125D0221
1042609
SUCTION COVER
BOLT, M12XM20L
STRAINER
ST4125D025
1040547
ST4125D032
ST4125D0321
ST4125D0324
1040548
1042612
ST4125D0391
1042613
ST4125D0491
1042614
MECHANICAL SEAL
OIL SEAL
HOSE CONNECTION, DISCHARGE 2"
BOLT, M10X25L
O-RING, DIA.3.1X105
OIL PLUG, M12
SEAL STOPPER
BOLT, M5X10L
BOTTOM PLATE
BOLT, M12X120L
MOTOR COVER
ST4125D0501
ST4125D0504
1042615
BOLT, M12X35L, M10X35L
O-RING, DIA.35X232
PACKING, UPPER
1042616
BALL BEARING, UPPER, #6306ZZC3
THERMAL PROTECTOR
GASKET, FLANGE HOSE CONNECTION
NUT, IMPELLER, M20X2.5P
ROTOR, UNIT
1042617
TBD
1042618
ST4125D055
1042619
STATOR
1042620
1042621
ST4125D0601
ST4125D0604
1042623
ST4125D0611
1042624
BALL BEARING (LOWER)#6308/#7308
BEARING HOUSING, LOWER
BOLT, M8X20L
O-RING, DIA.3.1/135
BEARING COVER
BOLT, M6X16L
STATOR HOUSING
BOLT, M10X100L
KEY, 7X7X30
ST4125D0641
1042625
1042627
EYE BOLT, LIFTING,W3/4”
SEAL, LEAKAGE SENSOR
STOP RING
WAVE WASHER, DIA.55X70.5X0.4
KIT, MECHANICAL SEAL, SLEEVE, O-RINGS..........1 ...........INCLUDES ITEMS W/ #
1033125
1040549
ST4125D0157
1027620
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 29
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ST-6125D — SUBMERSIBLE PUMP ASSY.
ST-6125D SUBMERSIBLE PUMP ASSY.
1
3
2
24
18
24
4
50
6
5
19
33
MECHANICAL
SEAL, SLEEVE,
O-RINGS KIT
46
28
20
27
7
29
32
36
30
23
22
43
21
16
9
11
10
44
49
8
31
17
12
34
35
13
14
45
42
15
41
37
25
48
47
40
38
26
39
PAGE 30 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-6125D — SUBMERSIBLE PUMP ASSY.
ST-6125D SUBMERSIBLE PUMP ASSY.
NO
1
2
3
4
5
6
7
PART NO
1035149
1042637
ST6125D031
1042638
1042639
PART NAME
QTY.
1
REMARKS
CABLE, POWER, 24 MM 50'
CABLE GLAND, DIA.38
BOLT, M12X25L
1
2
1
1
7
1
CABLE BUSH, DIA.34
CABLE ENTRY ASSY.
BOLT
ST6125D061
1042640
MOULDINGTUBE
8
9
1042641
VOLUTE, HOUSING
BOLT, M12X40L
O-RING, DIA.35X190
LOWER PACKING
IMPELLER
SUCTION COVER
BOLT, M12XM20L
STRAINER
MECHANICAL SEAL
OIL SEAL
FLANGE, HOSE CONNECTION DISCHARGE
BOLT, M10X25L
O-RING, DIA.3.1X105
OIL PLUG, M12
SEAL STOPPER, (OPTIONAL)
BOLT, M5X10L
HOSE CONNECTION, DISCHARGE
BOTTOM PLATE
BOLT, BOTTOM PLATE, M12X120L
MOTOR COVER
1
1
4
1
1
1
4
1
1
2
1
4
1
1
1
3
1
1
3
1
6
1
1
ST6125D02011
ST6125D0204
1042642
1042643
1042644
ST6125D0221
1042645
ST6125D025
1042646
10#
11
12
13
14
15
16#
17
18
19
20#
21
22
23
24
25
26
27
28
29#
30
1042647
ST6125D0321
ST6125D0324
1042648
1042649
ST6125D0391
1042611
1042650
ST6125D0491
1042651
ST6125D0501
ST6125D0504
1042652
BOLT, M12X35L, M10X35L
O-RING, DIA.35X232
UPPER PACKING
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 31
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ST-6125D — SUBMERSIBLE PUMP ASSY.
ST-6125D SUBMERSIBLE PUMP ASSY.
1
3
2
24
18
24
4
50
6
5
19
33
MECHANICAL
SEAL, SLEEVE,
O-RINGS KIT
46
28
20
27
7
29
32
36
30
23
22
43
21
16
9
11
10
44
49
8
31
17
12
34
35
13
14
45
42
15
41
37
25
48
47
40
38
26
39
PAGE 32 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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ST-6125D — SUBMERSIBLE PUMP ASSY. (CONTINUED)
ST-6125D SUBMERSIBLE PUMP ASSY. (CONTINUED)
NO
31
32
33#
34
35
36
37
38
39
40#
41
42
43
44
45
46
47
48
49
50
PART NO
1042653
1042617
TBD
1042655
1042654
1042663
1042664
1042665
ST6125D0601
ST6125D0604
1042666
ST6125D0611
1042667
ST6125D0641
1042668
1042670
1033125
1042671
ST6125D0157
1027622
PART NAME
BALL BEARING, UPPER, #6306ZZC3
THERMAL SENSOR
GASKET, DISCHARGE CONNECTION
NUT, IMPELLER, M20X2.5P
ROTOR UNIT
QTY.
1
3
1
1
1
1
2
1
6
1
1
4
1
2
1
2
REMARKS
STATOR
BALL BEARING, LOWER, #6308/#7308
BEARING HOUSING, LOWER
BOLT, M8X20L
O-RING, DIA.3.1/135
BEARING COVER
BOLT, M6X16L
STATOR HOUSING
BOLT, M10X100L
KEY, IMPELLER, 7X7X30
EYE BOLT, LIFTING, W3/4”
SEAL LEAKAGE SENSOR
STOP RING, S-40
WAVE WASHER, DIA.55X70.5X0.4
KIT, MECHANICAL SEAL, SLEEVE, O-RINGS .... 1 ....................INCLUDES ITEMS W/ #
1
1
1
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 33
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TERMS AND CONDITIONS OF SALE — PARTS
PAYMENT TERMS
5. Partsmustbeinnewandresalablecon- Multiquipreservestherighttoquoteandsell
dition,intheoriginalMultiquippackage(if directtoGovernmentagencies,andtoOriginal
any), and with Multiquip part numbers Equipment Manufacturer accounts who use
Terms of payment for parts are net 30 days.
FREIGHTPOLICY
clearlymarked.
our products as integral parts of their own
products.
All parts orders will be shipped collect or
prepaidwiththechargesaddedtotheinvoice.
All shipments are F.O.B. point of origin.
Multiquip’sresponsibilityceaseswhenasigned
manifesthasbeenobtainedfromthecarrier,
andanyclaimforshortageordamagemustbe
settledbetweentheconsigneeandthecarrier.
6. Thefollowingitemsarenotreturnable:
SPECIALEXPEDITINGSERVICE
a. Obsolete parts. (If an item is in the
price book and shows as being re- A$35.00surchargewillbeaddedtotheinvoice
placedbyanotheritem,itisobsolete.) forspecialhandlingincludingbusshipments,
insuredparcelpostorincaseswhereMultiquip
mustpersonallydeliverthepartstothecarrier.
(such as gaskets, seals, “O” rings,
b. Any parts with a limited shelf life
andotherrubberparts)thatwerepur- LIMITATIONSOFSELLER’SLIABILITY
MINIMUMORDER
chasedmorethansixmonthspriorto
thereturndate.
Multiquip shall not be liable hereunder for
damagesinexcessofthepurchasepriceofthe
TheminimumchargeforordersfromMultiquip
is $15.00 net. Customers will be asked for
instructionsregardinghandlingofordersnot
meetingthisrequirement.
c. Anylineitemwithanextendeddealer item with respect to which damages are
netpriceoflessthan$5.00.
claimed, and in no event shall Multiquip be
liable for loss of profit or good will or for any
otherspecial,consequentialorincidentaldam-
ages.
d. Special order items.
RETURNEDGOODSPOLICY
e. Electricalcomponents.
f. Paint,chemicals,andlubricants.
g. Decalsandpaperproducts.
h. Itemspurchasedinkits.
Returnshipmentswillbeacceptedandcredit
willbeallowed,subjecttothefollowingprovi-
sions:
LIMITATIONOFWARRANTIES
Nowarranties,expressorimplied,aremade
in connection with the sale of parts or trade
accessoriesnorastoanyenginenotmanufac-
tured by Multiquip. Such warranties made in
connectionwiththesaleofnew,completeunits
are made exclusively by a statement of war-
rantypackagedwithsuchunits,andMultiquip
neitherassumesnorauthorizesanypersonto
assume for it any other obligation or liability
whatever in connection with the sale of its
products.Apartfromsuchwrittenstatementof
warranty, there are no warranties, express,
impliedorstatutory,whichextendbeyondthe
descriptionoftheproductsonthefacehereof.
1. AReturnedMaterialAuthorizationmust
be approved by Multiquip prior to ship-
ment.
7. Thesenderwillbenotifiedofanymaterial
receivedthatisnotacceptable.
2. ToobtainaReturnMaterialAuthorization,
alistmustbeprovidedtoMultiquipParts
Salesthatdefinesitemnumbers,quanti-
ties, and descriptions of the items to be
returned.
8. Suchmaterialwillbeheldforfiveworking
days from notification, pending instruc-
tions.Ifareplyisnotreceivedwithinfive
days,thematerialwillbereturnedtothe
senderathisexpense.
a. Thepartsnumbersanddescriptions
must match the current parts price
list.
9. Creditonreturnedpartswillbeissuedat
dealer net price at time of the original
purchase,lessa15%restockingcharge.
b. The list must be typed or computer
generated.
10. In cases where an item is accepted, for
which the original purchase document
can not be determined, the price will be
basedonthelistpricethatwaseffective
twelvemonthspriortotheRMAdate.
c. The list must state the reason(s) for
thereturn.
Effective: February 22, 2006
d. The list must reference the sales
order(s)orinvoice(s)underwhichthe
itemswereoriginallypurchased.
11. Credit issued will be applied to future
purchasesonly.
e. The list must include the name and
phonenumberofthepersonrequest-
ingtheRMA.
PRICINGANDREBATES
Prices are subject to change without prior
notice.Pricechangesareeffectiveonaspe-
cificdateandallordersreceivedonorafterthat
datewillbebilledattherevisedprice.Rebates
3. AcopyoftheReturnMaterialAuthoriza-
tionmustaccompanythereturnshipment.
4. Freight is at the sender’s expense. All forpricedeclinesandaddedchargesforprice
partsmustbereturnedfreightprepaidto increaseswillnotbemadeforstockonhand
Multiquip’sdesignatedreceivingpoint.
atthetimeofanypricechange.
PAGE 34 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08)
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NOTES
ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV. #1 (06/12/08) — PAGE 35
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OPERATION AND PARTS MANUAL
HERE’S HOW TO GET HELP
PLEASE HAVETHE MODEL AND SERIAL
NUMBER ON-HANDWHEN CALLING
UNITED STATES
Multiquip Corporate Office
18910 Wilmington Ave.
Carson, CA 90746
MQ Parts Department
800-427-1244
Tel. (800) 421-1244
Fax (800) 537-3927
Fax:800-672-7877
Fax:310-637-3284
310-537-3700
Contact: [email protected]
Mayco Parts
800-306-2926
310-537-3700
Warranty Department
800-421-1244, Ext. 279 Fax:310-537-1173
310-537-3700, Ext. 279
Fax:800-672-7877
Fax:310-637-3284
Service Department
800-421-1244
Technical Assistance
800-478-1244
Fax:310-537-4259
Fax:310-631-5032
310-537-3700
MEXICO
MQ Cipsa
UNITED KINGDOM
Multiquip (UK) Limited Head Office
Hanover Mill, Fitzroy Street,
Ashton-under-Lyne,
Carr. Fed. Mexico-Puebla KM 126.5
Momoxpan, Cholula, Puebla72760Mexico
Tel: (52) 222-225-9900
Fax: (52) 222-285-0420
Tel: 0161 339 2223
Fax: 0161 339 3226
Lancashire OL7 0TL
CANADA
Multiquip
BRAZIL
Multiquip
4110IndustrielBoul.
Laval, Quebec, Canada H7L 6V3
Tel: (450) 625-2244
Fax: (450) 625-8664
Av. Evandro Lins e Silva, 840 - grupo 505 Tel: 011-55-21-3433-9055
Barra de Tijuca - Rio de Janeiro Fax: 011-55-21-3433-9055
© COPYRIGHT 2008, MULTIQUIP INC.
Multiquip Inc and the MQ logo are registered trademarks of Multiquip Inc. and may not be used, reproduced, or altered without written permission. All other trademarks are
the property of their respective owners and used with permission.
This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and should remain with the unit if resold.
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations, descriptions, references and technical data
contained in this manual are for guidance only and may not be considered as binding. Multiquip Inc. reserves the right to discontinue or change specifications, design or
the information published in this publication at any time without notice and without incurring any obligations.
Your Local Dealer is:
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