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FMC Technologies W11 - User Manual

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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
Rev
ECN No.
Date
Reviewed By
Approved By
Status
C
5041126
30-SEP-2016
Rothe, Michael
Kowalski, Christopher
RELEASED
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.

Table of Contents

Questions and Answers

  • D
    David HollowayAug 4, 2025
    How to troubleshoot no flow from FMC Technologies Water Pump?
    • E
      elaineschneiderAug 4, 2025
      If your FMC Technologies Water Pump is experiencing no flow, several factors could be at play. First, ensure the lines are connected and the tank is adequately filled with liquid, as the reservoir might be empty. Second, check that the inlet line valve is open and properly connected. A clogged inlet strainer can also impede flow, so clean or replace it as needed. Finally, verify that the crankshaft is turning by checking the power supply and drive connections.
  • C
    Chris OrtizAug 9, 2025
    Why is my FMC Technologies Water Pump pressure so low?
    • P
      Patrick CantuAug 9, 2025
      If your FMC Technologies Water Pump is exhibiting insufficient pressure, start by checking the belt tightness or power to the motor, as the pump speed may be too low. Inspect the relief valve and adjust its setting, as it may be improperly adjusted or worn. Also, ensure the system resistance is adequate, addressing issues like a worn nozzle through proper servicing. Check the check valves, repairing or replacing them if worn. Finally, address excessive leakage from the pump seals by adjusting or replacing the packing or any damaged parts.
  • S
    Stephanie MillerAug 13, 2025
    What to do if my FMC Technologies W11 Water Pump has insufficient flow?
    • T
      Tom WilliamsAug 13, 2025
      If your FMC Technologies Water Pump has insufficient flow only, begin by checking the belt tightness or power to the motor, as the pump speed might be too low. Inspect the relief valve and adjust its setting, as it may be improperly adjusted or worn. Additionally, inspect the pump valves and repair or replace them if worn. Address excessive leakage from the pump seals by adjusting or replacing the packing or any damaged parts. If the plunger or piston is worn, replace it. Lastly, if the valve seat is washed out in the fluid cylinder, repair or replace the fluid cylinder.
  • J
    James CaseyAug 18, 2025
    Why is my FMC Technologies Water Pump leaking fluid?
    • M
      Matthew HarrisAug 18, 2025
      If your FMC Technologies Water Pump is leaking fluid, it could be due to several reasons. The piston cups may be worn and need replacement. Alternatively, the piston to rod o-ring might be damaged, requiring replacement. Ensure that the fluid cylinder bolts are properly tightened and torqued. Lastly, inspect the fluid cylinder o-rings or gaskets for damage and replace them as necessary.
  • M
    michaelandersonAug 28, 2025
    What causes crankshaft jerking in FMC Technologies Water Pump?
    • M
      mcrawfordAug 29, 2025
      If the crankshaft of your FMC Technologies Water Pump jerks or starts and stops rotation, check if the drive belts are loose and slipping (if equipped) and correctly adjust the belt tension. Also, the system relief valve pressure might be set too high, so reduce the relief valve pressure setting. Lastly, clear any obstructions from the piping system, as the discharge line may be blocked or partially blocked.
  • C
    Carrie RamirezNov 23, 2025
    Why is my FMC Technologies Water Pump vibrating and losing pressure?
    • G
      Gwendolyn ParkNov 23, 2025
      If your FMC Technologies Water Pump is experiencing insufficient flow or pressure along with rough operation (pump pounds or vibrates), there are several potential causes to investigate. First, ensure all pump cylinders are primed. If a bypass or relief is piped back to suction, redirect it to the reservoir (tank). An inlet line that is too long or too small in diameter can also cause these issues, so increase the suction pipe size. Insufficient NPSHA can be a factor, so provide more NPSH. Air leaks in the suction line or fittings should be corrected through proper installation to stop leaks. A vortex in the tank near the inlet pipe opening can also contribute, so increase submergence or use a baffle to stop the vortex. If a booster pump is in use, ensure it is correctly installed to preve...

Summary

Important Safety Instructions

Storage Instructions

Short Term Storage

Guidelines for storing the FMC pump for less than six months in a controlled environment.

Short Term Storage for Severe Environments

Procedures for storing the pump for short periods in harsh environmental conditions.

Long Term Storage

Detailed steps for storing the pump for periods exceeding six months to prevent damage.

Returning a Stored Pump to Operation

Steps to safely bring a stored FMC pump back into operational condition.

Precautions during Freezing Weather

Essential measures to prevent damage from freezing when the pump is idle or stored.

Installation Guidelines

General Location

Recommendations for selecting an optimal and level mounting location for the pump.

Mounting Pump to Foundation and Power Source

Instructions on securely mounting the pump and aligning it with the power source.

Suction Piping Recommendations

Best practices for designing and installing suction piping for optimal pump performance.

Discharge Piping Recommendations

Guidelines for correctly routing and installing discharge piping to ensure safety and efficiency.

Multiple Pump Systems

Considerations for installing FMC pumps in systems with multiple reciprocating units.

How to Start a Pump

Lubrication of the Power End

Recommended Lubricants

Guidance on selecting appropriate oils and lubricants for the power end based on service.

Oil Changes

Procedures and intervals for performing essential oil changes in the power end.

Inspection and Preventative Maintenance Chart

Service Procedures

Replacing Cup Pistons

Step-by-step instructions for replacing worn or damaged piston cups in the pump.

Removing the Fluid Cylinder

Detailed procedure for safely removing the fluid cylinder for inspection or repair.

Replacing Valves

Instructions for servicing and replacing suction and discharge valves in the pump.

Servicing the Power End

Procedures for maintenance and repair of the pump's power end components.

Troubleshooting Your FMC Pump

FMC Technologies W11 Specifications

General IconGeneral
BrandFMC Technologies
ModelW11
CategoryWater Pump
LanguageEnglish

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