Doc No: OMM50002312 
Rev:  C Page 1 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. 
 
 
 
OPERATION AND MAINTENANCE MANUAL, W11 TRIPLEX PUMPS 
 
 
 
 
 
 
 
Summary: 
This is a manual for FMC W11 triplex piston pumps. These pumps include a pinion drive 
for internal gear reduction; they have a stroke length of 2.75 inches, and maximum 
continuous duty power ratings ranging from 20 horsepower (15 kilowatts) for the W1118 
to 30 horsepower (22 kilowatts) for the W1122. The maximum intermittent duty rating is 
24 horsepower (18 kilowatts) for the W1118 to 36 horsepower (27 kilowatts) for the 
W1122. Refer to part number 5266226 for printing information.