Wilo American-Marsh Pumps SXU 490 Series User manual

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

IOM 490 SXU 6”_0522
- 2 -
TABLE OF CONTENTS
INTRODUCTION ........................................................................................................................ - 4 -
SAFETY SECTION A ................................................................................................................... - 5 -
INSTALLATION SECTION B ........................................................................................................ - 7 -
Pump Dimensions ................................................................................................................. - 7 -
Outline Drawing .................................................................................................................... - 7 -
PREINSTALLATION INSPECTION ............................................................................................... - 8 -
POSITIONING PUMP .................................................................................................................. - 8 -
Lifting ................................................................................................................................... - 8 -
Mounting .............................................................................................................................. - 8 -
Clearance .............................................................................................................................. - 9 -
SUCTION AND DISCHARGE PIPING ........................................................................................... - 9 -
Materials ............................................................................................................................... - 9 -
Line Configuration ................................................................................................................ - 9 -
Connections to Pump ........................................................................................................... - 9 -
Gauges .................................................................................................................................. - 9 -
SUCTION LINES ......................................................................................................................... - 9 -
Fittings .................................................................................................................................. - 9 -
Strainers ............................................................................................................................. - 10 -
Sealing ................................................................................................................................ - 10 -
Suction Lines In Sumps ....................................................................................................... - 10 -
Suction Line Positioning ..................................................................................................... - 10 -
DISCHARGE LINES ................................................................................................................... - 11 -
Siphoning ............................................................................................................................ - 11 -
Valves ................................................................................................................................. - 11 -
Bypass Lines ....................................................................................................................... - 12 -
AUTOMATIC AIR RELEASE VALVE ........................................................................................... - 13 -
Theory of Operation ........................................................................................................... - 13 -
Air Release Valve Installation ............................................................................................. - 13 -
ALIGNMENT ............................................................................................................................. - 14 -
Coupled Drives ................................................................................................................... - 14 -
Drive Belts .......................................................................................................................... - 15 -
PRIMING .................................................................................................................................. - 16 -
STARTING ................................................................................................................................ - 16 -
Rotation .............................................................................................................................. - 17 -
OPERATION ............................................................................................................................. - 17 -
Lines With a Bypass ............................................................................................................ - 17 -
Lines Without a Bypass ....................................................................................................... - 17 -
Leakage .............................................................................................................................. - 17 -
Liquid Temperature And Overheating ................................................................................ - 17 -

IOM 490 SXU 6”_0522 - 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 ...................................................................... - 22 -
PERFORMANCE CURVE ........................................................................................................... - 22 -
ILLUSTRATION ........................................................................................................................ - 23 -
PARTS LIST .............................................................................................................................. - 24 -
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY ............................................................... - 25 -
Back Cover and Wear Plate Removal .................................................................................. - 26 -
Rotating Assembly Removal .............................................................................................. - 26 -
Impeller Removal ................................................................................................................ - 27 -
Seal Removal ...................................................................................................................... - 27 -
Shaft and Bearing Removal and Disassembly ..................................................................... - 28 -
Shaft and Bearing Reassembly and Installation ................................................................. - 29 -
Seal Installation .................................................................................................................. - 30 -
Impeller Installation and Adjustment ................................................................................. - 33 -
Rotating Assembly Installation .......................................................................................... - 34 -
Back Cover and Wear Plate Installation and Adjustment ................................................... - 34 -
PRESSURE RELIEF VALVE MAINTENANCE .............................................................................. - 36 -
Final Pump Assembly .......................................................................................................... - 36 -
LUBRICATION .......................................................................................................................... - 36 -
Seal Assembly ..................................................................................................................... - 36 -
Bearings .............................................................................................................................. - 37 -
Power Source ...................................................................................................................... - 37 -
WARRANTY ............................................................................................................................. - 38 -

IOM 490 SXU 6”_0522 - 4 -
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. Therefore, it is the
responsibility of the owner/installer of the pump to ensure that applications not addressed in this
manual are performed only after establishing that neither operator safety nor pump integrity are
compromised by the installation. Pumps and related equipment must be installed and operated
according to all national, local and industry standards.
If there are any questions regarding the pump or its application which are not covered in this
manual or in other literature accompanying this unit, please contact your AMP distributor:
American-Marsh Pumps
550 E. South St.
Collierville, TN 38017
Phone: [phone]
For information or technical assistance on the power source, contact the power source
manufacturer's local dealer or representative.
RECORD YOUR PUMP MODEL AND SERIAL NUMBER
Please record your pump model and serial number in the spaces provided below.
Your American-Marsh Pumps (AMP) distributor needs this information when you require parts or service.
Pump Model:
Serial Number:

IOM 490 SXU 6”_0522
- 5 -
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.
WARNING: Hazards or unsafe practices which COULD result in severe personal injury or
death. These instructions describe the procedure required and the injury which could
result from failure to follow the procedure.
CAUTION: Hazards or unsafe practices which COULD result in minor personal injury or
product or property damage. These instructions describe the requirements and the
possible damage which could result from failure to follow the procedure.
NOTE
Instructions to aid in installation, operation, and maintenance or which clarify a procedure.
SAFETY SECTION A
This information applies to the 490 Series SXU 6” pumps. AMP has no control over or particular
knowledge of the power source which will be used. Refer to the manual accompanying the power
source before attempting to begin operation.
This manual will alert personnel to known procedures which require special attention, to those
which could damage equipment, and to those which could be dangerous to personnel. However,
this manual cannot possibly provide detailed instructions and precautions for each specific
application or for every situation that might occur during maintenance of the unit. Therefore, it is
the responsibility of the owner, installer and/or maintenance personnel to ensure that applications
and/or maintenance procedures
NOT addressed in this manual are performed ONLY after
establishing that neither personal safety
NOR pump integrity are compromised by such
applications or procedures.
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
2.
Disconnect or lock out the power source to ensure that the pump will remain
inoperative.
3.
Allow the pump to completely cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5.
Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump.