Wilo American-Marsh Pumps SXU 490 Series Installation And Operating Manual

Wilo American-Marsh Pumps SXU 490 Series Installation And Operating Manual

6” self-priming pumps

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A WILO BRAND
490 Series SXU 6"
Self-Priming Pumps
Installation and Operating Manual

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Summary of Contents for Wilo American-Marsh Pumps SXU 490 Series

  • Page 1 A WILO BRAND 490 Series SXU 6” Self-Priming Pumps Installation and Operating Manual...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ........................- 4 - SAFETY SECTION A ........................- 5 - INSTALLATION SECTION B ......................- 7 - Pump Dimensions ......................... - 7 - Outline Drawing ........................- 7 - PREINSTALLATION INSPECTION ....................- 8 - POSITIONING PUMP ........................
  • Page 3 Strainer Check ........................- 18 - Pump Vacuum Check ......................- 18 - STOPPING ..........................- 18 - Cold Weather Preservation ....................- 19 - BEARING TEMPERATURE CHECK .................... - 19 - TROUBLESHOOTING SECTION D ..................... - 19 - PREVENTIVE MAINTENANCE ....................- 21 - PUMP MAINTENANCE AND REPAIR SECTION E ..............
  • Page 4: Introduction

    INTRODUCTION Thank You for purchasing an American-Marsh Pump. Read this manual carefully to learn how to safely install and operate your pump. Failure to do so could result in personal injury or damage to the pump. Because pump installations are seldom identical, this manual cannot possibly provide detailed instructions and precautions for every aspect of each specific application.
  • Page 5: Safety Section A

    HAZARD AND INSTRUCTION DEFINITIONS The following are used to alert maintenance personnel to procedures which require special attention, to those which could damage equipment, and to those which could be dangerous to personnel: DANGER: Immediate hazards which WILL result in severe personal injury or death. These instructions describe the procedure required and the injury which will result from failure to follow the procedure.
  • Page 6 This pump is designed to handle most non‐volatile, non‐flammable liquids containing specified entrained solids. Do not attempt to pump volatile, corrosive, or flammable materials which may damage the pump or endanger personnel as a result of pump failure. After the pump has been positioned, make certain that the pump and all piping connections are tight, properly supported and secure before operation.
  • Page 7: Installation Section B

    INSTALLATION SECTION B Review all SAFETY information in Section A. Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and arrange the pump and piping. Most of the information pertains to a standard static lift application where the pump is positioned above the free level of liquid to be pumped.
  • Page 8: Preinstallation Inspection

    PREINSTALLATION INSPECTION The pump assembly was inspected and tested before shipment from the factory. Before installation, inspect the pump for damage which may have occurred during shipment. Check as follows: Inspect the pump for cracks, dents, damaged threads, and other obvious damage. b.
  • Page 9: Clearance

    Clearance It is recommended that 24 inches (610 mm) of clearance be provided in front of the back cover to permit removal of the cover and easy access to the pump interior. A minimum clearance of 11.5 inches (292 mm) must be maintained to permit removal of the cover. SUCTION AND DISCHARGE PIPING Pump performance is adversely effected by increased suction lift, discharge elevation, and friction losses.
  • Page 10: Strainers

    to avoid creating air pockets. Valves are not normally used in suction lines, but if a valve is used, install it with the stem horizontal to avoid air pockets. Strainers If a strainer is furnished with the pump, be certain to use it; any spherical solids which pass through a strainer furnished with the pump will also pass through the pump itself.
  • Page 11: Discharge Lines

    Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity DISCHARGE LINES Siphoning Do not terminate the discharge line at a level lower than that of the liquid being pumped unless a siphon breaker is used in the line. Otherwise, a siphoning action causing damage to the pump could result.
  • Page 12: Bypass Lines

    Bypass Lines Self‐priming pumps are not air compressors. During the priming cycle, air from the suction line must be vented to atmosphere on the discharge side. If the discharge line is open, this air will be vented through the discharge. However, if a check valve has been installed in the discharge line, the discharge side of the pump must be opened to atmospheric pressure through a bypass line installed between the pump discharge and the check valve.
  • Page 13: Automatic Air Release Valve

    AUTOMATIC AIR RELEASE VALVE Theory of Operation When properly installed, an Automatic Air Release Valve (ARV) will permit air to escape through the bypass line and then close automatically when the pump is fully primed and pumping at full capacity. Some leakage (1 to 5 gallons [3.8 to 19 liters] per minute) will occur when the valve is fully closed.
  • Page 14: Alignment

    NOTE For multiple pump installations, it is recommended that each Air Release Valve be fitted with an independent bleeder line directed back to the wet well. If multiple Air Release Valves are installed in a system, DO NOT direct bleeder lines to a common manifold pipe. ALIGNMENT The alignment of the pump and its power source is critical for trouble‐free mechanical operation.
  • Page 15: Drive Belts

    Align spider insert type couplings by using calipers to measure the dimensions on the circumference of the outer ends of the coupling hub every 90°. The coupling is in alignment when the hub ends are the same distance apart at all points (see Figure 4). Align non‐spider type couplings by using a feeler gauge or taper gauge between the coupling halves every 90°.
  • Page 16: Priming

    Ideal drive belt tension is the lowest tension at which the belt will not slip under peak load conditions. Do not over‐tension drive belts. Over‐tensioning will shorten both drive belt and bearing life. Under‐tensioning will cause belt slippage. Always keep belts free from dirt, grease, oil and other foreign material which may cause slippage.
  • Page 17: Rotation

    Rotation The correct direction of pump rotation is counterclockwise when facing the impeller. The pump could be damaged and performance adversely affected by incorrect rotation. If pump performance is not within the specified limits (see the curve in SECTION E), check the direction of power source rotation before further troubleshooting.
  • Page 18: Strainer Check

    allow it to cool before servicing it. Refill the pump casing with cool liquid. Allow an over‐heated pump to completely cool before servicing. Do not remove plates, covers, gauges, or fittings from an over‐heated pump. Liquid within the pump can reach boiling temperatures, and vapor pressure within the pump can cause parts being disengaged to be ejected with great force.
  • Page 19: Cold Weather Preservation

    Do not operate the pump against a closed discharge throttling valve for long periods of time. If operated against a closed discharge throttling valve, pump components will deteriorate, and the liquid could come to a boil, build pressure, and cause the pump casing to rupture or explode. Cold Weather Preservation In below freezing conditions, drain the pump to prevent damage from freezing.
  • Page 20 TROUBLE POSSIBLE CAUSE PROBABLE REMEDY PUMP FAILS TO Not enough liquid in casing. Add liquid to casing. See PRIMING. PRIME Suction check valve contaminated or Clean or replace check valve. damaged. Air leak in suction line. Correct leak. Lining of suction hose collapsed. Replace suction hose.
  • Page 21: Preventive Maintenance

    PREVENTIVE MAINTENANCE Since pump applications are seldom identical, and pump wear is directly affected by such things as the abrasive qualities, pressure and temperature of the liquid being pumped, this section is intended only to provide general recommendations and practices for preventive maintenance. Regardless of the application however, following a routine preventive maintenance schedule will help assure trouble‐free performance and long life from your AMP pump.
  • Page 22: Pump Maintenance And Repair Section E

    PUMP MAINTENANCE AND REPAIR SECTION E MAINTENANCE AND REPAIR OF THE WEARING PARTS OF THE PUMP WILL MAINTAIN PEAK OPERATING PERFORMANCE. PERFORMANCE CURVE * STANDARD PERFORMANCE FOR PUMP MODEL SXU-6” Based on 70°F (21° C) clear water at sea level with minimum suction lift. Since pump installations are seldom identical, your performance may be different due to such factors as viscosity, specific gravity, elevation, temperature, and impeller trim.
  • Page 23: Illustration

    ILLUSTRATION Figure 1b. Pump Model SXU-6” - 23 IOM 490 SXU 6”_0522...
  • Page 24: Parts List

    PARTS LIST Pump Model SXU-6” Contact AMP to verify part numbers. PART NAME PART NAME PART NAME Capscrew Pump Casing Seal Plate Gasket Spring Washer Pipe Plug Inboard Oil Seal Suction Flange Capscrew Inboard Oil Seal Pipe Plug Spring Washer O-Ring Check Valve Pin CVR Plate Handle...
  • Page 25: Pump And Seal Disassembly And Reassembly

    PUMP AND SEAL DISASSEMBLY AND REASSEMBLY Review all SAFETY information in Section A. Follow the instructions on all tags, label and decals attached to the pump. This pump requires little service due to its rugged, minimum‐maintenance design. However, if it becomes necessary to inspect or replace the wearing parts, follow these instructions which are keyed to the illustration (see Figure 1b.) and the accompanying parts lists.
  • Page 26: Back Cover And Wear Plate Removal

    Back Cover and Wear Plate Removal (Figure 1b.) The wear plate (43) is easily accessible and may be serviced by removing the back cover (37). Before attempting to service the pump, remove the pump casing drain plugs (29) and drain the pump.
  • Page 27: Impeller Removal

    (Figure 1b.) Remove the inner hardware (66 and 67) from the casing ring (65). Install three of the inner capscrews in the jacking holes in the casing ring, and use them to press the rotating assembly into the pump casing until the bearing housing is free. Remove the jacking screws from the casing ring.
  • Page 28: Shaft And Bearing Removal And Disassembly

    Use a pair of stiff wires with hooked ends to remove the stationary element and seat. An alternate method of removing the stationary seal components is to remove the hardware (59 and 60) and separate the seal plate (53) and gasket (54) from the bearing housing (44). Position the seal plate on a flat surface with the impeller side down.
  • Page 29: Shaft And Bearing Reassembly And Installation

    The bearing tolerances provide a tight press fit onto the shaft and a snug slip fit into the bearing housing. Replace the bearings, shaft, or bearing housing if the proper bearing fit is not achieved. If bearing replacement is required, remove the outboard bearing snap ring (74) and use a bearing puller to remove the bearings from the shaft.
  • Page 30: Seal Installation

    When installing the shaft and bearings into the bearing bore, push against the outer race. Never hit the balls or ball cage. It is recommended that a sleeve be positioned against the inboard oil seal (56) to prevent the lip of the oil seal from rolling as the shaft and bearings are installed in the bearing housing.
  • Page 31 If a replacement seal is being used, remove it from the container and inspect the precision finished faces to ensure that they are free of any foreign matter. To ease installation of the seal, lubricate the shaft sleeve O‐ring and the external stationary seat O‐ ring with a very small amount of light lubricating oil.
  • Page 32 Most new cartridge seal assemblies are equipped with mylar storage tabs between the seal faces. These storage tabs must be removed before installing the seal. Lubricate the external stationary seat O‐ring with light oil. Slide the seal assembly onto the shaft until the external stationary seat O‐ring engages the bore in the seal plate.
  • Page 33: Impeller Installation And Adjustment

    to avoid scratching the faces. Carefully wash all metallic parts in fresh cleaning solvent and allow to dry thoroughly. Do not attempt to separate the rotating portion of the seal from the shaft sleeve when reusing an old seal. The rubber bellows will adhere to the sleeve during use, and attempting to separate them could damage the bellows.
  • Page 34: Rotating Assembly Installation

    After the rotating assembly is installed in the pump casing, coat the threads of the impeller capscrew (47) with `Never‐Seez' or equivalent compound, and install the impeller washer (48) and capscrew; torque the capscrew to 90 ft. lbs. (1080 in. lbs. or 12,4 m. kg.). Rotating Assembly Installation (Figure 1b.) Install the seal plate and bearing housing O‐rings (52 and 57) and lubricate them with light grease.
  • Page 35 Figure 7. Installing and Adjusting Back Cover Hand Nut (35) Adjusting Studs (36) Eye Bolts (33) Screw the four adjusting studs (36) into the tapped holes in the back cover plate until they are just flush with the machined surface on the back side of the cover plate. Align the back cover plate over the two eye bolts (33) and slide it into the pump casing.
  • Page 36: Pressure Relief Valve Maintenance

    the back cover. Remove the rotating assembly adjusting shims, then reinstall the hardware securing the rotating assembly to the pump casing. Perform the back cover adjustment procedure described above to obtain the proper face clearance. PRESSURE RELIEF VALVE MAINTENANCE (Figure 1b) The back cover is equipped with a pressure relief valve (34) to provide additional safety for the pump and operator (refer to Liquid Temperature and Overheating in OPERATION).
  • Page 37: Bearings

    The white reflector in the sight gauge must be positioned horizontally to provide proper drainage. Bearings (Figure 1b) The bearing housing has not been lubricated from the factory. Lubrication must be added to the seal and bearing sump prior to running. Check the oil level regularly through the sight gauge (62, the lower one) and maintain it at the middle of the gauge.
  • Page 38: Warranty

    WARRANTY American-Marsh Pumps guarantees that only high-quality materials are used in the construction of our pumps and that machining and assembly are carried out to high standards. The pumps are guaranteed against defective materials and/or faulty craftsmanship for a period of one (1) year from the date of shipment unless specifically stated otherwise.
  • Page 39 WILO USA LLC American-Marsh Pumps T +1 262 204 6600 www.wilo-usa.com T +1 901 860 2300 www.american-marsh.com info.us@wilo.com F +1 901 860 2323 amp.cs@wilo.com A WILO BRAND...

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