Doc No: OMM50002312 
Rev:  C Page 29 of 54 
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3.  Rock the fluid cylinder (34) to loosen from the cylinders 
(37), and then pull free of the fluid end studs (59). If the 
piston assemblies have already been removed, take care to 
ensure that the cylinders do not fall off of the front of the 
power end and become damaged. 
4.  To remove the piston assemblies, refer to steps 3 through 7 
of the previous section. 
5.  Inspect all parts for signs of wear or damage. Replace parts 
as necessary in accordance with the previous section. 
6.  Always replace the 
cylinder gaskets (47) 
when the cylinders have 
been moved or replaced. 
7.  Reverse steps 2 through 6 
to install the FMC W11 
fluid cylinder (34).  
8.  Torque all fasteners as outlined in the Fastener Torque 
Requirements, Section 11.0 of this manual. Note that if the 
nuts (52) on the fluid cylinder studs (58, 59) are not 
properly torqued, likelihood of pump failure is greatly 
increased.