FMC Corporation - Talstar FMC L06 - Manual (Page 23)

Doc No: OMM50000903
Rev: B Page 23 of 65
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Type A Type B
10.0 Service Procedures
FMC pumps are designed to simplify all required maintenance. The following sections
illustrate step-by-step instructions for performing most common service procedures of a
pump. Read each section before starting service work on the pump.
Refer to Figures 3 and 4 for location of components.
WARNING:
Many accidents occur every year through careless use or service of
mechanical equipment. You can avoid hazards associated with high-
pressure equipment by always following the safety precautions listed in
Section 1.0.
10.1 Replacing Cup Pistons
Service Tip - Due to the large uninstalled diameter,
Type B piston cups on L0918 pumps
(2.25” nominal bore diameter) cannot
be inserted through the fluid end
without the risk of damaging the
sealing surface of the cup. Any
pump with Type A cups are not
affected, and you can skip directly to
step 1 in this section.
Service Tip – To perform service on L0918 pumps
equipped with Type B pistons, the
fluid end must be removed and the
liners taken to a bench or other
suitable work area for assembly.
Follow the steps outlined in section
9.2, “Removing the Fluid Cylinder”,
for information about this procedure.
Service Tip – Type B pistons in L0918 pumps
must be installed in the piston liners
using a press or vice as shown to the
right. Be sure to protect both ends of
the assembly with soft vice jaws,
wood blocks, or a suitable non-
marring material to insure the
components are not damaged during
this process.
Service Tip – Press the piston assembly into the liner until the sealing lip has just entered the
front of the liner. Use a small amount of glycerin on the ID of the liner to help
lubricate the piston during installation. After the liner has been installed in the
pump power frame, drive the piston assembly fully to its stop using the FMC
piston tool (A5049) and a rubber mallet.