Graco LineLazer 3400 User Manual (English)

Other manuals for Graco LineLazer 3400

Operation - Repair - Parts44 pages

Repair26 pages

Installation8 pages

Questions and Answers:

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Jeffrey DavenportAug 20, 2025
How to fix Graco Paint Sprayer when engine will not start?
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  Allison Mullins DVMAug 20, 2025
  If your Graco Paint Sprayer engine won't start, first ensure the engine switch is turned ON. Other potential causes include an empty gasoline tank (refill it), low engine oil level (check and replenish if needed), a disconnected or damaged spark plug (connect or replace it), a cold engine (use the choke), or the fuel shutoff lever being OFF (move it to the ON position). Also, oil seeping into the combustion chamber can prevent starting. Remove the spark plug, pull the starter 3-4 times, clean or replace the spark plug, and then restart the engine, keeping the sprayer upright to prevent further oil seepage.
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patriciabauerAug 22, 2025
Why is fluid spitting from the gun of my Graco Paint Sprayer?
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  George LoweAug 22, 2025
  If you're experiencing fluid spitting from the gun of your Graco Paint Sprayer, it could be due to air in the pump or hose. Check and tighten all fluid connections. Reprime the pump. The tip might also be partially clogged, so clear the tip. Another cause is a low or empty fluid supply, so refill the fluid supply and prime the pump, checking the fluid supply often to prevent running the pump dry.
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Jacob RichardsonAug 25, 2025
How to stop excessive paint leakage into throat packing nut on Graco Paint Sprayer?
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  mendezericaAug 25, 2025
  If you have excessive paint leakage into the throat packing nut of your Graco Paint Sprayer, it could be because the throat packing nut is loose. Remove the throat packing nut spacer and tighten the throat packing nut just enough to stop the leakage. Alternatively, the throat packings could be worn or damaged, or the displacement rod might be worn or damaged.
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Tiffany SimpsonAug 28, 2025
What causes the pump to be difficult to prime on a Graco Paint Sprayer?
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  William MorrisonAug 28, 2025
  If your Graco Paint Sprayer pump is difficult to prime, there might be air in the pump or hose. Check and tighten all fluid connections, and reduce engine speed while cycling the pump slowly during priming. Another cause could be a leaking intake valve; clean the intake valve, ensuring the ball seat is not nicked or worn and that the ball seats well before reassembling the valve. Worn pump packings can also make priming difficult, and if the paint is too thick, thin it according to the supplier's recommendations. Also, ensure the engine speed isn't too high by decreasing the throttle setting before priming the pump.
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Bryan FoleyAug 29, 2025
What to do if the displacement pump does not operate on my Graco Paint Sprayer?
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  Angela JacksonAug 30, 2025
  If your Graco Paint Sprayer engine operates, but the displacement pump doesn't, first check if the pump switch is turned OFF and turn it ON. Also, the pressure setting might be too low, so turn the pressure adjusting knob clockwise to increase pressure. A dirty fluid filter or a clogged tip or tip filter can also prevent the pump from operating. Additionally, the displacement pump piston rod might be stuck due to dried paint. Other potential causes include a worn or damaged connecting rod or drive housing. Check the wiring connections and test for power between clutch test points on the control board. If the clutch is worn, damaged, or incorrectly positioned, it may also cause the pump to not operate. Lastly, a worn or damaged pinion assembly can also be the cause.
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Natasha McgrathAug 31, 2025
What causes high engine speed at no load on my Graco Paint Sprayer?
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  Jessica RomeroAug 31, 2025
  If your Graco Paint Sprayer has 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. Another possible cause is a worn engine governor, which would need to be replaced or serviced.
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paul45Sep 2, 2025
Why does the clutch squeak each time it engages on my Graco Paint Sprayer?
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  cameronjonesSep 2, 2025
  If the clutch squeaks each time it engages on your Graco Paint Sprayer, it is because the clutch surfaces are not matched to each other when new and may cause noise. The clutch surfaces need to wear into each other, and the noise will dissipate after a day of run time.
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Katie NicholsSep 4, 2025
How to fix Graco LineLazer 3400 Construction Equipment when engine will not start?
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  Michael MooreSep 4, 2025
  If your Graco Construction Equipment engine won't start, there are several potential causes: * The engine switch might be OFF. Turn it ON. * The engine could be out of gasoline. Refill the gas tank. * The engine oil level may be low. Check and replenish if necessary. * The spark plug might be disconnected or damaged. Connect or replace it. * If it's a cold engine, use the choke. * The fuel shutoff lever could be OFF. Move it to the ON position. * Oil might be seeping into the combustion chamber. Remove the spark plug, pull the starter 3-4 times, clean or replace the spark plug, and start the engine. Keep the sprayer upright to prevent oil seepage.
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scottteresaSep 6, 2025
Why is the pump output low on my Graco Construction Equipment?
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  Christopher HernandezSep 6, 2025
  If your Graco Construction Equipment's pump output is low, consider these potential causes and solutions: * The strainer might be clogged; clean it. * The engine speed may be too low; increase the throttle setting. * The clutch could be worn or damaged; adjust or replace it. * The pressure setting might be too low; increase the pressure. * The fluid filter or tip could be clogged or dirty; clean the filter or clear the tip. * A large pressure drop in the hose with heavy materials can occur; use a larger diameter hose and/or reduce the overall length of the hose. Note that using more than 100 ft of 1/4 in. hose significantly reduces sprayer performance, so using 3/8 in. hose for optimum performance (50 ft minimum) is recommended.
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Jessica MercadoSep 8, 2025
What to do if Graco LineLazer 3400 engine runs but the pump doesn't?
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  James WadeSep 8, 2025
  If the engine of your Graco Construction Equipment operates but the displacement pump doesn't, check the following: * Ensure the pump switch is ON. If it's OFF, turn it ON. * The pressure setting might be too low. Turn the pressure adjusting knob clockwise to increase the pressure. * If the fluid filter is dirty, clean it.