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Graco LineLazer 3400 - User Manual

Graco LineLazer 3400
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For the application of line striping materials. For professional use only. For outdoor use
only. Not approved for use in explosive atmospheres or hazardous locations.
Models: 25M224, 25P341 (China Model Only)
3300 psi (22.8 MPa, 228 bar) Maximum Operating Pressure
Important Safety Instructions
Read all warnings and instructions in this manual, related manuals, and on the
equipment. Be familiar with the controls and the proper usage of the equipment.
Save these instructions.
Related Manuals:
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309250 Pump
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Questions and Answers

  • R
    ryan98Sep 10, 2025
    Why is fluid spitting from the gun of my Graco LineLazer 3400?
    • C
      Christopher NovakSep 10, 2025
      If fluid is spitting from the gun of your Graco Construction Equipment, it could be due to: * Air in the pump or hose. Check and tighten all fluid connections and reprime the pump. * A partially clogged tip. Clear the tip. * Low or empty fluid supply. Refill the fluid supply, prime the pump, and check the fluid supply often to prevent running the pump dry.
  • T
    Thomas DunnSep 12, 2025
    Why is my Graco Construction Equipment pump difficult to prime?
    • E
      Erin KellySep 12, 2025
      If you're finding that your Graco Construction Equipment pump is difficult to prime, here are a few things to check: * Make sure there's no air in the pump or hose. Check and tighten all fluid connections, and reduce the engine speed, cycling the pump as slowly as possible during priming. * The intake valve might be leaking. Clean the intake valve, ensuring the ball seat isn't nicked or worn and that the ball seats well. Then, reassemble the valve. * The paint could be too thick. Thin the paint according to the supplier's recommendations. * Engine speed may be too high. Decrease throttle setting before priming pump.
  • W
    wswansonSep 13, 2025
    Why is there excessive paint leakage into the throat packing nut of my Graco LineLazer 3400?
    • R
      robert90Sep 13, 2025
      If there's excessive paint leakage into the throat packing nut of your Graco Construction Equipment, the following could be the cause: * The throat packing nut might be loose. Remove the throat packing nut spacer and tighten the throat packing nut just enough to stop the leakage.
  • Y
    ycarrSep 15, 2025
    What causes high engine speed at no load in Graco LineLazer 3400?
    • C
      Chelsea ToddSep 16, 2025
      If your Graco Construction Equipment has a high engine speed at no load, it could be due to: * A misadjusted throttle setting. Reset the throttle to 3300 engine rpm at no load.
  • J
    John RiceSep 18, 2025
    Why does the clutch squeak on my Graco LineLazer 3400 Construction Equipment?
    • B
      bwoodardSep 18, 2025
      If the clutch squeaks each time it engages on your Graco Construction Equipment, it may be because the clutch surfaces are new and not yet matched. The noise should dissipate after a day of run time as the surfaces wear into each other.
  • J
    James KingNov 25, 2025
    Why is the pump output low on my Graco Paint Sprayer?
    • L
      Lisa RussellNov 25, 2025
      If the Graco Paint Sprayer pump output is low, start by cleaning the strainer. Other possible causes include a piston ball not seating correctly, worn or damaged piston packings or O-rings in the pump. Also, the intake valve ball might not be seating properly or could be packed with material, so clean the intake valve. Ensure the engine speed isn't too low by increasing the throttle setting. Check if the clutch is worn or damaged and adjust or replace it if necessary. Also, ensure the pressure setting isn't too low by increasing the pressure. A clogged fluid filter, tip filter, or tip can also cause low output, so clean them. Finally, if you're using heavy materials, a large pressure drop in the hose could be the issue. Use a larger diameter hose and/or reduce the overall length of the hos...

Summary

Warnings

Skin Injection Hazard

High-pressure spray can inject toxins, causing serious injury. Avoid spraying people or animals.

Fire and Explosion Hazard

Flammable fumes can ignite. Use in ventilated areas, eliminate ignition sources, and ground equipment.

Equipment Misuse Hazard

Misuse can cause death or serious injury. Do not operate fatigued, exceed pressure, or alter equipment.

Pressurized Aluminum Parts Hazard

Incompatible fluids can cause chemical reactions and equipment rupture. Avoid specific solvents.

Moving Parts Hazard

Moving parts can pinch or amputate. Keep clear and do not operate with guards removed.

Carbon Monoxide Hazard

Exhaust contains poisonous carbon monoxide. Do not operate in enclosed areas.

Toxic Fluid or Fumes Hazard

Toxic fluids/fumes cause injury if splashed, inhaled, or swallowed. Read SDS and store fluids properly.

Burn Hazard

Equipment surfaces and fluid can be very hot. Avoid touching hot fluid or equipment.

Personal Protective Equipment

Wear appropriate PPE like eyewear, hearing protection, respirators, clothing, and gloves.

Grounding Procedure

Pressure Relief Procedure

Operation

Gun Placement

Paint Stripe Width

Troubleshooting

Displacement Pump

Drive Housing and Connecting Rod

Pinion Assembly;Clutch Armature;Clamp

Clutch Housing

Engine

Pressure Control Transducer

Pressure Control (On;Off Switch)

Pressure Adjust Potentiometer

Control Board

Gun Arm Parts

Pressure Control;Filter Assembly

Technical Data

Graco LineLazer 3400 Specifications

General IconGeneral
BrandGraco
ModelLineLazer 3400
CategoryConstruction Equipment
LanguageEnglish

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