Magnum ProLTS 17 - 24N906

Magnum ProLTS 17

Sprayer is Not Priming

Clearing a Tip Clog

Basic Trouble Shooting

Is the sprayer turning on?

Is it priming?

Does it spray at all?

Reverse the spray tip and clear the clog.

Did this resolve the issue?

The issue is resolved.

Strain the paint.

Use a larger spray tip if available.

Clean the gun filter.

Powerflush the sprayer.

Did this resolve the issue?

The issue is resolved.

Clean and inspect the inlet and outlet valve.

Replace if the issue is not solved or a defect is found.

There are several causes:
1. The needle is held open with debris.
2. The grey nut at the back of the gun is turned too tight, loosen it slightly.
3. The needle may be worn and needs to be replaced. Have the gun serviced or install a new repair kit for the specific gun you are using.

Is it a new sprayer?

Jog the motor.

Did this resolve the issue?

The issue is resolved.

Powerflush the sprayer.

Did this resolve the issue?

The issue is resolved.

Remove the inlet and outlet valve and verify the ball can move freely.
If this does not fix it, you will need to create a Salesforce case to escalate the call to a Graco tier II tech.

Please advise the customer they will be contacted back by a Tier II Technician.

Powerflush the sprayer.

Did this resolve the issue?

The issue is resolved.

Clean and inspect inlet and outlet valve.

Replace if not solved or defect found.

Have you already been spraying today?

Check the following:

  1. Turn up the pressure control knob.
  2. Plug directly into a non-GFCI outlet.
  3. Check for a burnt fuse (ProX models only).

Did this resolve the issue?

The issue is resolved.

You will need to create a Salesforce case to escalate the call to a Graco tier II tech.

Please advise the customer they will be contacted back by a Tier II Technician.

Reverse the spray tip and try to clear a tip clog.

Did this resolve the issue?

The issue is resolved.

Check the following:

  1. If you sprayed a lot today allow motor to cool for 30 minutes and try again.
  2. Verify extension cord is at least 14 gauge and no longer than 50 ft.
  3. Turn up the pressure control knob.
  4. Plug directly into a non-GFCI outlet.
  5. Check for a burnt fuse (ProX models only).

Did this resolve the issue?

The issue is resolved.

You will need to create a Salesforce case to escalate the call to a Graco tier II tech.

Please advise the customer they will be contacted back by a Tier II Technician.

Follow these steps:

  • Make sure the suction tube (the larger, braided tube) and the strainer are completely submerged in the paint.
  • Some paints are very thick and require the pump to slow down to prime. Turn the on/off switch ON and then OFF until the pump is about to stops and then turn the sprayer ON and then OFF again. You may need to do this a few times until paint works its way into the pump and out the drain tube (smaller clear tube).
  • Remove the suction tube (larger, braided tube). Insert the pointed end of a pencil into the inlet and push up to free the inlet valve ball.
  • Remove and clean the outlet valve. (See component identification and troubleshooting in your owner’s manual.)
  • Remove and clean the inlet valve. (See component identification and troubleshooting in your owner’s manual.) Be sure not to lose the inlet ball (some models have a spring as well).
  • Remove the strainer and connect the Power Flush adapter and a garden hose to the suction tube. Following the directions in your owner’s manual, flush the sprayer with water for one minute. Reinstall the strainer on the suction tube, submerge the suction tube in the paint and prime the sprayer.

Make sure the unit is plugged into a working outlet. If it is, turn the sprayer on and then turn the sprayer’s pressure control knob clockwise until the motor starts running.

When the gun trigger is released, the motor and pump will automatically turn off. Once you pull the gun trigger and start spraying, the motor and pump will turn on again. This is normal operation and eliminates constant motor noise and reduces wear for longer life.

If the motor continues to run when the gun trigger is released, it is not primed.

Make sure the Prime/Spray Valve is pointed forward in the Spray position

The spray tip is likely clogged. Turn the spray tip 180 degrees to the unclog position, aim the spray gun into a bucket and pull the trigger for one second to clear the clog. Turn the spray tip back to the spray position and resume spraying.

The best way to reduce tip clogs is to strain you paint of the larger debris.

Make sure the pressure control is turned up to a higher spray pressure. Try moving closer to the surface. If you continue to see lines in your pattern, you may need a larger tip size if you sprayer can support it (the largest tip that the Project Painter Plus and X5/LTS15 can support is the tip that is included). Otherwise, add a small amount of water or solvent, depending upon your material. Be sure to work the water or solvent into the paint that is in your paint hose by reversing the tip and spraying the paint back into the paint bucket until the thinner material is worked into the paint hose. Don’t forget to turn your spray tip back to the spray position.

You most likely have a tip plug. Turn the spray tip 180 degrees to the unclog position, aim the spray gun into a bucket and pull the trigger for one second to clear the clog. Turn the spray tip back to the spray position and resume spraying.

The pump needs to be serviced or replaced.

The spray hose connection is not tight. Use a wrench to tighten the spray hose to the sprayer and to the gun.

Turn Pressure Control Knob clockwise to increase pressure setting

  • Check that lighted plug on sprayer is lit (this indicates electric power at outlet).
  • Reset building circuit breaker or replace fuse.

Check for broken insulation or wires. Replace electric cord if damaged.

Take sprayer to Graco/MAGNUM authorized service center.

 Replace extension cord. Read Grounding and Electric Requirements, page 10.

Turn Prime/Spray Valve to PRIME position (pointing down).

Clean debris off inlet strainer and make sure suction tube is immersed in paint.

Remove inlet housing. Clean or replace ball and seat.

Remove suction tube and place a pencil into the inlet section to dislodge the ball, allowing pump to prime properly. Or, Power Flush sprayer, see Operation manual 313034.

AutoPrime may need replacement. Turn power switch ON and listen for “tap” in pump. If you do not hear “tap”, AutoPrime is damaged. Take sprayer to Graco/MAGNUM authorized service center.

Check suction tube for cracks and cuts. Make sure suction tube clamp is on hose. Replace suction tube if cracked or damaged.

ProLTS 17 and ProLTS 19: Insert screw driver in slot and remove Easy-Access door, page 8. Unscrew outlet valve with a 3/4 in. socket. Remove and clean assembly.

LTS 15 and LTS 17: Remove outlet fitting and clean outlet check ball. 

Remove suction tube from paint. Prime pump with water or solvent-based flushing fluid, see Operation manual 313034.

Check for worn pump valves.
a. Prime sprayer with paint
b. Trigger gun momentarily.
When trigger is released, pump should cycle momentarily and stop. If pump continues to cycle, pump valves may be worn.

Thin material per manufacturer recommendations.

Momentarily turn power switch OFF to allow pump to slow and stop. Repeat as necessary.

Clean debris off inlet screen and make sure suction tube is immersed in fluid.

Take sprayer to Graco/MAGNUM authorized service center.

 Prime pump, see Operation manual 313034.

Clean debris off inlet screen and make sure suction tube is immersed in fluid.

Check suction tube for cracks and cuts. Make sure suction tube clamp is on hose. Replace suction tube if cracked or damaged.

Read Pump does not prime section in Troubleshooting, page 14.

Slowly turn pressure control knob clockwise to increase pressure setting which will turn motor on to build pressure.

Unclog spray tip, see Operation manual 313034.

Clean or replace InstaClean fluid filter, see Operation manual 313034.

Clean or replace gun fluid filter, see Operation manual 313034.

Replace tip.

Material is going on too thick.

Move gun faster.
Choose a spray tip with smaller hole size.
Choose spray tip with wider fan.
Make sure gun is far enough from surface.

Material is going on too thin.

Move gun slower.
Choose spray tip with larger hole size.
Choose spray tip with narrower fan.
Make sure gun is close enough to surface.

Pressure control switch is worn and causing excessive pressure variation.

Take sprayer to Graco/MAGNUM authorized service center.

Spray gun trigger lock is locked.

Rotate trigger safety lever to unlock trigger lock, page 11.

Pressure control switch is worn.

Take sprayer to Graco/MAGNUM authorized service center.

System is over pressurizing.

Take sprayer to Graco/MAGNUM authorized service center.

Pump packings are worn.

Take sprayer to Graco/MAGNUM authorized service center.

Keep vent holes clear of obstructions and overspray and keep sprayer open to air.

Replace extension cord. Read Grounding and Electrical Requirements, page 10.

Use electrical generator with a proper voltage regulator. Sprayer requires 120VAC, 60 Hz, 1500-Watt generator.

Spray tip is clogged.

Unclog spray tip, see Operation manual 313034.

Rotate arrow-shaped handle on spray tip so it points forward on gun.

Select smaller spray tip.

Replace spray tip.

Replace extension cord. See Grounding and Electrical Requirements, page 10.

Clean or replace spray gun fluid filter, see Operation manual 313034.

Clean debris off inlet screen.

Check for worn pump valves.
a. Prime sprayer with paint
b. Trigger gun momentarily. When trigger is released, pump should cycle momentarily and stop. If pump continues to cycle, pump valves may be worn.

Thin material.

Remove section of hose.

Clean or replace InstaClean fluid filter, see Operation manual 313034.

Pressure control switch is worn and causing excessive pressure variation.

Take sprayer to Graco/MAGNUM authorized service center.