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Fimco PRO Series - User Manual

Fimco PRO Series
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Page 1
Model: LG-50-TRL-PRO-BL
(5302930)
(50 Gallon Professional
Lawn & Garden Trailer Sprayer)
Assembly Instructions
Make sure the contents of the sprayers carton match the
items shown on page 2 of the manual.
Follow the steps on pages 3, 4, 5 & 6 to properly assemble
the sprayer.
After assembly is complete and before testing your sprayer,
connect the wiring harness to the rear of the pump. Clip the
alligator clip ends to a fully charged 12 Volt battery.
www.fimcoindustries.com
1000 FIMCO Lane, P.O. Box 1700, North Sioux City, SD 57049
Toll Free Phone: 800-831-0027 : Toll Free Fax: 800-494-0440
[5194549 (11/20)]
Professional Grade Pump (4.0 GPM):
Ideal for Harsh Chemicals & Oil
Based Chemicals with Surfactants
Long Range 22” PRO SERIES Handgun
38’ Horizontal Spray & 27’ Vertical
Roundup® Ready
Technical Specifications
50 Gal. Corrosion-Resistant Polyethylene Tank
Pro Series 4.0 GPM, 45 PSI, 12 Volt Pump
Adjustable Height Boomless Boom (30’ Spray Coverage)
Corrosion-Resistant Nozzles
18 x 8.5 x 8 Turf Tires
Multi-Lid
OWNER’S MANUAL
BEFORE RETURNING THIS PRODUCT
FOR ANY REASON, PLEASE CALL
1-800-831-0027
MONDAY-FRIDAY, 8:00 AM TO 5:00 PM CST
If you should have a question or experience a problem with
your Fimco Industries Product: Visit our website @
www.fimcoindustries.com or call the Toll free number above. Our
technical support representatives will be happy to help you.
In most cases a customer service rep. can resolve
the problem over the phone.
To obtain prompt, efficient service, always remember to give the
following information....
• Correct Part Description and/or part number
• Model number and Serial Number
Part descriptions and numbers can be obtained from the
illustrated parts list section(s) of this manual.
General Information
Thank you for purchasing this product. The purpose of this
manual is to assist you in operating and maintaining your lawn
& garden Trailer sprayer.
Retain a copy of your receipt for your unit, as it will be required
to validate any warranty service.
Warranted against manufacturer or workmanship defects from
date of purchase with copy of receipt:
Homeowner Usage: One Year.
Commercial Usage: 90 Days.

Table of Contents

Questions and Answers

  • Z
    Zachary SnyderAug 19, 2025
    What to do if Fimco PRO Paint Sprayer motor does not run?
    • M
      millermarkAug 19, 2025
      If the motor of your Fimco Paint Sprayer isn't running, here are a few things to check: * Make sure the wiring connections are secure. * Ensure the 'ON/OFF' switch on the lead wire assembly is in the 'ON' position ('I'). 'O' is the 'OFF' position. * Verify the pressure switch isn't defective and that you're connected to a good 12-volt power source. Also, check that any on/off switches are in the 'on' position. * You can also remove the cap to the pressure switch, pull both red wires off of their terminals, and touch the two ends together. If your pump runs when you do this, your pressure switch will need to be replaced. * Inspect the fuse. * Check for low voltage at the power supply.
  • A
    Ashley PhelpsAug 21, 2025
    Why does my Fimco PRO Paint Sprayer motor continue to run after discharge is shut off?
    • D
      dvillarrealAug 21, 2025
      If the motor of your Fimco Paint Sprayer continues to run after you shut off the discharge, consider the following potential causes: * Check if the product supply is empty. * Inspect the bypass valve to ensure it is not open (if your sprayer is equipped with one). * Verify that the voltage is not low. * Look for any leaks in the discharge line. * Examine the check valve for defects or dirt. * Check the pressure switch for any defects.
  • J
    Jessica PerezAug 23, 2025
    Why is my Fimco PRO pump not priming?
    • S
      Shawn GomezAug 23, 2025
      If your Fimco Paint Sprayer pump isn't priming, it could be due to several reasons: * Check the supply line for air leaks. * Inspect the check valve assembly for any debris. * Check for a defective check valve. * Make sure the strainer/filter isn't clogged. * Look for cracks in the pump housing. * Ensure that the product supply isn't empty.
  • D
    Diane StevensAug 26, 2025
    What to do if the Fimco Paint Sprayer motor does not run?
    • K
      Kelly CharlesAug 26, 2025
      If the motor of your Fimco Paint Sprayer isn't running, there are several things you can check: * Ensure that all wiring connections are secure. * Verify the 'ON/OFF' switch on the lead wire assembly is in the 'ON' position ('I'). * Check the fuse. * Confirm there is sufficient voltage at the power supply. * Inspect the pressure switch; ensure you're connected to a 12-volt power source and that any on/off switches are 'on'. To test the pressure switch, disconnect the wires from their connections, and short them together using a wire. If the pump runs, the pressure switch needs replacement.
  • M
    Mr. Dustin RyanAug 28, 2025
    Why is there low pressure/low flow in my Fimco PRO Paint Sprayer?
    • A
      Arthur MasseyAug 28, 2025
      If you're experiencing low pressure or low flow with your Fimco Paint Sprayer, consider the following: * Check for any leaks or restrictions in the discharge line. * Inspect the nozzle orifice for debris. * Examine the strainer for clogs. * Ensure proper voltage by trying another 12-volt battery.
  • S
    Stephen MccoyAug 30, 2025
    How to fix a Fimco Paint Sprayer when the pump does not prime?
    • J
      johnleeAug 30, 2025
      If the pump on your Fimco Paint Sprayer isn't priming, try these steps: * Check the supply line for air leaks. * Inspect the check valve assembly for debris and ensure the check valve isn't defective. * Look for a clogged strainer/filter. * Check the pump housing for cracks. * Make sure that the product supply is not empty.
  • T
    triciajonesSep 1, 2025
    What to do if Fimco Paint Sprayer motor runs after shutting off discharge?
    • J
      Judy HolmesSep 2, 2025
      If the motor of your Fimco Paint Sprayer continues to run after the discharge is shut off, check these items: * Ensure the product supply isn't empty. * Inspect for an open bypass valve (if equipped). * Check for low voltage and leaks in the discharge line. * Inspect the pressure switch for defects. * Check the system for leaks.
  • T
    Tara RichardsonSep 4, 2025
    How to stop pulsating flow (surging) in my Fimco PRO Paint Sprayer?
    • J
      Jaclyn ReyesSep 4, 2025
      To address pulsating flow (surging) in your Fimco Paint Sprayer, consider these potential causes and solutions: * Low flow may cause the pump to surge. * The spray wand might be adjusted for too fine a spray pattern. * Slightly open the bypass (if applicable). * Adjust the pressure switch a quarter turn clockwise until the surging stops, if needed. * Check for a defective pressure switch, leaks or restrictions in the discharge line, debris in the nozzle orifice, a discharge hose that is too long or a clogged strainer.
  • A
    Alyssa SolisSep 6, 2025
    Why does the fuse keep blowing in my Fimco PRO Paint Sprayer?
    • M
      Mark LeSep 6, 2025
      A fuse blowing in your Fimco Paint Sprayer could be due to: * Excessive voltage. * Improper adjustment of the pressure switch. * A damaged or defective wiring harness. * The half-moon & counterweight sticking.
  • S
    Samuel CoxSep 8, 2025
    Why does the motor continue to run after I shut off the discharge on my Fimco PRO Paint Sprayer?
    • J
      Julie CraigSep 8, 2025
      If the motor continues to run after the discharge is shut off on your Fimco Paint Sprayer, several issues could be the cause. First, ensure that your product supply is not empty. If your sprayer is equipped with a bypass valve, check to see if it's open. Low voltage could also be a factor. Inspect the discharge line for any leaks. Also, examine the check valve for defects or dirt, and check the pressure switch for any defects.

Summary

General Information and Support

Customer Support and Returns

Contact Fimco for assistance, returns, and problem resolution via phone or website.

Warranty Information

Details on retaining receipts and warranty periods for homeowner and commercial use.

Technical Specifications

Assembly Instructions

End Nozzle Assembly Procedure

End Nozzle Information

Details on nozzle mounting stem, ratcheting motion, and optimal spray angle.

On;Off Valve Positions

Explains valve states (Open, Closed, Service, On/Off knob) for the nozzle.

Sprayer Testing and Operation

Sprayer Testing Procedure

Steps for testing the sprayer with water before chemical application to check for leaks.

Safety and Application Notes

Advice on weather, terrain, chemical labels, and protective clothing for safe spraying.

Pump and Sprayer Operation

How the pumping system works, connecting power, and pump activation.

Pressure Adjustment and Calibration

Methods for adjusting sprayer pressure and calibrating output based on speed and tips.

Boom Nozzle Usage and Maintenance

Boom Nozzle Usage Considerations

Key factors for effective boom nozzle spraying: chemical mix, rate, pressure, and speed.

Post-Spraying Maintenance

Procedures for cleaning, flushing, and maintaining the pump and sprayer after use.

Winter Storage Procedure

Steps for preparing the sprayer for winter storage using RV antifreeze.

Long Range Pro Series Handgun

Handgun Operation and Adjustment

How to adjust the spray pattern and lock the trigger lever on the handgun.

Pump Troubleshooting and Care

Pump Usage Guidelines

Recommended practices and prohibitions for pump operation, including what not to pump.

Troubleshooting Pump Issues

Common pump problems like no run, no prime, pulsating flow, or continuous running.

Pressure Switch Caution

System Component Details

Parts Identification

Comprehensive list of all parts for the sprayer model with part numbers.

Plumbing Assembly Details

Explains the plumbing layout and components with detailed diagrams.

Manifold and Intake Assembly

Details on manifold, intake assembly, and associated fittings shown in diagrams.

Limited Warranty Information

Warranty Coverage and User

Defines who is covered, what the warranty covers, and the warranty period.

Exclusions and Limitations

Lists what the warranty does not cover and limitations on implied warranties.

Obtaining Warranty Service

Steps to obtain warranty service and available remedies for defects.

Fimco PRO Series Specifications

General IconGeneral
BrandFimco
ModelPRO Series
CategoryPaint Sprayer
LanguageEnglish

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