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: www.multiquip.com THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
ST-4125D/ST-6125D — TABLE OF CONTENTS Multiquip ST-4125D/ ST-6125D Submersible Pumps Table Of Contents ..................................................... 2 Parts Ordering Procedures ....................................... 3 Safety Message Alert Symbols ................................. 5 Rules For Safe Operation ...................................... 6-7 Dimensions ............................................................... 8 Specifications (Pump) ...............................................
www.multiquip.com 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): If you have an MQ Account, to obtain a Username and Password, E-mail us at: parts@multiquip.com. Order parts on-line using Multiquip’s SmartEquip website! ■ View Parts Diagrams ■ Order Parts ■ Print Specification Information To obtain an MQ Account, contact your District Sales Manager for more information.
NOTES PAGE 4 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
ST-4125D/ST-6125D — SAFETY MESSAGE ALERT SYMBOLS FOR YOUR SAFETY AND THE 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. NOTE This Owner's Manual has been developed to provide complete instructions for the safe and efficient operation of the Multiquip Models ST4125D/ST6125D Submersible Pumps.
ST-4125D/ST-6125D — RULES FOR SAFE OPERATION WARNING - Read This Manual 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. The following safety guidelines should always be used when operating the ST-4125D/ST-6125D Submersible Pump: GENERAL SAFETY ■ NEVER use gas piping as an electrical ground.
ST-4125D/ST-6125D — RULES FOR SAFE OPERATION local codes before operating pump. Severe injury or death by electrocution can result from operating an ungrounded pump. ■ 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.
ST-4125D/ST-6125D — DIMENSIONS 13.5 in (343 mm) 11 in (279 mm) 13.5 in (343 mm) 39 in (991 mm) ST-4125D SUBMERSIBLE PUMP 33.5 in (851 mm) ST-6125D 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.
ST-4125D/ST-6125D — SPECIFICATIONS TABLE 1. SPECIFICATIONS Model ST-4125D ST-6125D Type Centrifugal Submersible Pump Centrifugal Submersible Pump Impeller Cast Ductile Iron Cast Ductile Iron Suction & Discharge Size 2.00 in. (51 mm) 2.00 in. (51 mm) Maximum Pumping Capacity 464 gallons/minute (1,756 liters/minute) 610 gallons/minute (2,309 liters/minute) Max Head 125 ft. (38 meters) 125 ft (38 meters) 10 HP (7.
ST-4125D/ST-6125D — GENERAL INFORMATION The Multiquip Model ST-4125D and ST-6125D submersible pumps are designed to pump water. These pumps work best when faced with high head applications where you need an appreciable flow. The mechanical seal of these pumps operates within an oilfilled chamber that provides positive lubrication. This helps prevent damage in the event the pump is run dry for short periods of time.
ST-4125D/ST-6125D 5 — SUBMERSIBLE PUMP COMPONENTS 6 5 6 4 4 3 3 2 ST-4125D SUBMERSIBLE PUMP ST-6125D SUBMERSIBLE PUMP 2 7 1 ST-4125D 7 1 8 ST-6125D 8 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. 1. Strainer Base – This strainer base is made of stainless steel which is resistant to hardware corrosion.
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.
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. Refer to Table 2 for the control box model that meets your pumping requirements.
ST-4125D/ST-6125D — CONTROL BOX INSTALLATION DANGER - Hazardous Voltage To place the ST-4125D/ST6125D submersible pumps into operation requires the use of a control box. The 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 contains hazardous voltages. Disconnect all sources of power before installing or servicing.
ST-4125D/ST-6125D — 230/460 VAC VOLTAGE SELECTION 230/460 VAC Voltage Selection 5. Remove the sleeving covering the large red wire and separate the 2 wires labeled 1 and 7. 6. 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. 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. 7.
ST-4125D/ST-6125D — CONTROL BOX WIRING DIAGRAM EXTERNAL 3-PHASE (230 OR 460 VOLT) POWER SOURCE CB-12/CB-14 POWER INPUT CIRCUIT BREAKER L2 L2 L3 L3 GREEN L2 L3 M L1 L1 RED WHITE BLACK L1 THREE PHASE WIRING CONNECTIONS H1 BLK RED AWG 8 RED RED AWG 8 WHT H3 H2 T1 GRN PUMP T2 MOTOR T3 H4 SEE TABLE 2 FOR CORRECT HEATER SELECTION CONTROL TRANSFORMER 50VA CPT GROUND F1 XF FUSE 1/2 AMP O/L RED AWG 8 WHT X2 X1 GRN OVERLOAD RELAY MAN 2 BLK 1 OFF O/L X2 NC AUTO 4 ON INDICATOR LAM
ST-4125D/ST-6125D — 3-PHASE POWER INSTALLATION 3-PHASE POWER CORD (INPUT TO BOX) INSTALLATION 3-PHASE POWER INSTALLATION (OUTPUT TO PUMP) 1. The three phase input power cord should have four wires. Each wire is color coded. The colors are RED, WHITE, BLACK and GREEN. 1. The three phase output power cord should have four wires. Each wire is color coded. The colors are RED, WHITE, BLACK and GREEN. 2.
ST-4125D/ST-6125D — 3-PHASE POWER INSTALLATION MOUNT CONTROL BOX IN AN UP-LEFT VERTICAL POSITION AS SHOWN. H1 H3 75VA TEMP. CL. U.S. PAT. NO. 3516040 C FNM-8/10 XF 50/60HZ 105 -3 ImperviTRAN(R) B075BTZ13JK 4- CAT. NO.
ST-4125D/ST-6125D — SETUP Control Box Setup 1. 2. From the voltage source set the circuit breaker or quick disconnect switch to the ON position. For manual operation of the pump, place the 3-position operation switch (Figure 9) on the control box in the MANUAL position. Figure 9. Manual-Off-Auto SW. (Manual Position) 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. Reset 1.
ST-4125D/ST-6125D — OPERATION Operation 2. Make sure the pump is always placed in an upright position, not tilted (Figure 15). Never position the pump directly on a soft, loose bottom. Remember to attain maximum pumping capacity and prevent excessive wear, position the pump so it will not burrow itself into sand or clay. LOWER LOWER 1. Attach a suitable lifting chain to the eye bolts (Figure 14) on the pump and using a crane, or similar equipment, lower the pump into place.
ST-4125D/ST-6125D — OPERATION 4. NEVER grab or touch a live power cord (Figure 16) with wet hands, the possibility exists of electrical shock, electrocution and even death. WET HANDS Pump Shut-Down/Clean-up 1. Remove the power from the pump by turning off the circuit breaker or switch that provides power to the pump. Remember to make sure that hands are dry (not wet), and feet are not standing in water when removing disconnecting power from the pump. 2.
ST-4125D/ST-6125D — MAINTENANCE LUBRICATION 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. 2. Remove oil fill plug. 3. Visually inspect oil plug hole to verify that oil cavity is full enough to cover seal spring. Check every 300 hours, change hydraulic oil every 6 months (1,000 hours) or as needed. 5. If oil level is low fill with SAE 10 weight non-detergent hydraulic oil (i.e. Shell Turbo 32 or equivalent).
ST-4125D/ST-6125D — TROUBLESHOOTING Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, use Table 6 (Pump Troubleshooting) as a basic guideline for troubleshooting the pump. If the problem cannot be remedied, contact Multiquip's service department. TABLE 6. PUMP TROUBLESHOOTING SYMPTOM Pump Fails To Start POSSIBLE PROBLEM SOLUTION Incorrect voltage/amps? Check that proper voltage (230/460 3Ø) is being supplied to the pump.
ST-4125D/ST-6125D — PERFORMANCE CURVES ST4125D Performance Curve 140 120 100 Total Head (Feet) 80 60 TOTAL HEAD Max 125 ft CAPACITY Max 464 G.P.M 40 20 0 100 200 300 400 500 600 Capacity(US.G.P.M) ST6125D Performance Curve 140 120 100 Total Head (Feet) 80 60 TOTAL HEAD Max 125 ft CAPACITY Max 610 G.P.M 40 20 0 100 200 300 400 500 600 Capacity(US.G.P.M) Figure 18. Pump Performance Curves PAGE 24 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
NOTES ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
EXPLANATION OF CODE IN REMARKS COLUMN The following section explains the different symbols and 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. 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. * * Numbers Used - Item quantity can be indicated by a number, a blank entry, or A/R.
ST-4125D/ST-6125D — SUGGESTED SPARE PARTS ST-4125D/ST-6125D SUBMERSIBLE PUMP 1 TO 3 UNITS Qty. 1 1 P/N 1027620 1027622 Description KIT, MECHANICAL SEAL, SLEEVE, O-RINGS KIT, MECHANICAL SEAL, SLEEVE, O-RINGS Remarks ST4125D ST6125D ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
ST-4125D — SUBMERSIBLE PUMP ASSY. ST-4125D SUBMERSIBLE PUMP ASSY. 1 50 3 2 4 6 19 5 MECHANICAL SEAL, SLEEVE, O-RINGS KIT 18 33 46 28 20 27 7 29 32 36 30 23 22 43 21 16 9 44 31 49 8 12 13 45 42 41 14 15 37 38 17 34 35 40 11 10 25 48 47 26 39 PAGE 28 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
ST-4125D — SUBMERSIBLE PUMP ASSY. ST-4125D SUBMERSIBLE PUMP ASSY.
ST-6125D — SUBMERSIBLE PUMP ASSY. ST-6125D SUBMERSIBLE PUMP ASSY. 1 3 24 18 2 24 4 50 6 5 19 33 46 28 MECHANICAL SEAL, SLEEVE, O-RINGS KIT 20 27 7 29 32 36 30 23 22 43 21 16 9 44 31 49 8 12 13 45 42 41 14 15 37 38 17 34 35 40 11 10 25 48 47 26 39 PAGE 30 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
ST-6125D — SUBMERSIBLE PUMP ASSY. ST-6125D SUBMERSIBLE PUMP ASSY. NO PART NO PART NAME QTY. 1 1035149 CABLE, POWER, 24 MM 50' 1 2 1042637 CABLE GLAND, DIA.38 1 3 ST6125D031 BOLT, M12X25L 2 4 1042638 CABLE BUSH, DIA.34 1 5 1042639 CABLE ENTRY ASSY. 1 6 ST6125D061 BOLT 7 7 1042640 MOULDING TUBE 1 8 1042641 VOLUTE, HOUSING 1 9 ST6125D02011 BOLT, M12X40L 1 10# ST6125D0204 O-RING, DIA.
ST-6125D — SUBMERSIBLE PUMP ASSY. ST-6125D SUBMERSIBLE PUMP ASSY. 1 3 24 18 2 24 4 50 6 5 19 33 46 28 MECHANICAL SEAL, SLEEVE, O-RINGS KIT 20 27 7 29 32 36 30 23 22 43 21 16 9 44 31 49 8 12 13 45 42 41 14 15 37 38 17 34 35 40 11 10 25 48 47 26 39 PAGE 32 — ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
ST-6125D — SUBMERSIBLE PUMP ASSY. (CONTINUED) ST-6125D SUBMERSIBLE PUMP ASSY. (CONTINUED) NO PART NO PART NAME QTY. REMARKS 31 1042653 BALL BEARING, UPPER, #6306ZZC3 1 32 1042617 THERMAL SENSOR 3 33# TBD GASKET, DISCHARGE CONNECTION 1 34 1042655 NUT, IMPELLER, M20X2.5P 1 35 1042654 ROTOR UNIT 1 36 1042663 STATOR 1 37 1042664 BALL BEARING, LOWER, #6308/#7308 2 38 1042665 BEARING HOUSING, LOWER 1 39 ST6125D0601 BOLT, M8X20L 6 40# ST6125D0604 O-RING, DIA.3.
TERMS AND CONDITIONS OF SALE — PARTS PAYMENT TERMS 5. Parts must be in new and resalable condition, in the original Multiquip package (if any), and with Multiquip part numbers clearly marked. 6. The following items are not returnable: Terms of payment for parts are net 30 days. FREIGHT POLICY All parts orders will be shipped collect or prepaid with the charges added to the invoice. All shipments are F.O.B. point of origin.
NOTES ST-4125D/ST-6125D SUBMERSIBLE PUMPS — OPERATION AND PARTS MANUAL — REV.
OPERATION AND PARTS MANUAL HERE’S HOW TO GET HELP PLEASE HAVE THE MODEL AND SERIAL NUMBER ON-HAND WHEN CALLING UNITED STATES Multiquip Corporate Office 18910 Wilmington Ave. Tel. (800) 421-1244 Carson, CA 90746 Fax (800) 537-3927 Contact: mq@multiquip.
