Doc No: OMM50002312 
Rev:  C Page 2 of 54 
Subject to contractual terms and conditions to the contrar
y, this document and all the information contained herein are the confidential and exclusive  
property of FMC Technologies, and may not be reproduced
, disclosed, or made public in any manner prior to express written authorization by FMCTI. 
Table of Contents 
1.0  Important Safety Instructions ...................................................................... 6 
2.0  W11 Pump Features ...................................................................................... 7 
3.0  Storage Instructions ..................................................................................... 8 
3.1  Short Term Storage ................................................................................... 8 
3.2  Short Term Storage for Severe Environments ........................................... 8 
3.3  Long Term Storage .................................................................................... 8 
3.4  Returning a Stored Pump to Operation ...................................................... 9 
3.5  Precautions during Freezing Weather ....................................................... 9 
4.0  Installation Guidelines ................................................................................ 11 
4.1  General Location ..................................................................................... 11 
4.2  Mounting Pump to Foundation and Power Source .................................. 11 
4.3  Suction Piping Recommendations ........................................................... 12 
4.4  Discharge Piping Recommendations ....................................................... 13 
4.5  Multiple Pump Systems ........................................................................... 14 
5.0  How to Start a Pump ................................................................................... 15 
6.0  Lubrication of the Power End .................................................................... 17 
6.1  Recommended Lubricants ....................................................................... 17 
6.2  Oil Changes ............................................................................................. 17 
7.0  Inspection and Preventative Maintenance Chart ...................................... 19 
8.0  Estimated Life of Wearing Components ................................................... 20 
9.0  Component Parts List ................................................................................. 21 
10.0  Service Procedures ..................................................................................... 25 
10.1  Replacing Cup Pistons............................................................................. 25 
10.2  Removing the Fluid Cylinder .................................................................... 28 
10.3  Replacing Valves ..................................................................................... 30 
10.3.1  Valve Assembly and Knock Out Tool ....................................................... 31 
10.3.2  Replacing W11 Disc Type Valves ............................................................ 32 
10.3.3  Valve Removal and Installation Tools ...................................................... 33 
10.3.4  Installation of Disc Valves ........................................................................ 34 
10.4  Servicing the Power End .......................................................................... 35 
10.4.1  Replacing Piston Rod Oil Seals ............................................................... 35 
10.4.2  Rebuilding the Power End ....................................................................... 36 
11.0  Fastener Torque Requirements ................................................................. 42 
12.0  Critical Clearances ...................................................................................... 43 
13.0  Special Service Tools ................................................................................. 44 
14.0  Troubleshooting Your FMC Pump ............................................................. 45 
15.0  Ordering Parts ............................................................................................. 48