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Graco st pro pump won't stop running not much pressure

The pump just keeps running at high speed not getting much pressure the seat ball has been cleaned there is new packers in it was working every day for five weeks then today it just stopped pumping any ideas

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

john224
  • 1378 Answers

SOURCE: pump stops running on high speed

You have a magnetek motor and it is overheating and cycling its thermal overload. A local electric motor repair shop may be able to fix it however it will likely need to be replaced. It is to costly to repair the motor if the damage is in the windings.

Assuming at that low a horsepower it is 115V, the likely replacement motor is a catalog #BN37. We sell it for $157. You are usually better off replacing the seal when you replace the motor and most Jacuzzi pumps are either a 200 or 1000. They should be around $5.

Posted on Jun 12, 2009

  • 16 Answers

SOURCE: High speed setting on pump won't work.

might be the starter capacitor or run capacitor

Posted on Aug 23, 2009

  • 5 Answers

SOURCE: My 39 month old pump stopped working today. Can

Any dealer can repair it. These pumps have a long life.

Posted on Dec 13, 2009

iambanshee74
  • 3489 Answers

SOURCE: Fuel pump stops working,Then runs again later

the relay for this truck is in the power distribution box under the hood. its a small 5 pin relay often called microrelays. this would be common.

Posted on Dec 28, 2009

  • 14036 Answers

SOURCE: I have a 2000 jeep

SOUND LIKE HEAT CORES LEAKING ANTIFREEZE INSIDE DASH.

Posted on May 09, 2011

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1 Answer

Cf2600 won't build pure pressure. Could air intake be stopped up. Had dirt dobber stop up on older compressor. Where is air intake. Can't locate.


No there is not a filter. Since the pump is enclosed in the plastic covers there would not be a way to service it. Now if it is not building any pressure then it could be a few things. First would be the drive belt. (item 125) If it breaks then it won't pump at all. Also if the air hose that exits the pump (item 122) gets a hole in it then it won't fill the tank. A worn head valve plate (item 106), blown gasket (item 105), or a worn piston and sleeve (items 109 and 112-2) can also cause this. If the check valve into the tank (item 16) gets stuck open it too will limit how much the compressor will pump BUT usually it will build up some pressure then just keep running without building any higher pressure into the tank.

Here is a parts diagram so you can see where the belt and other parts are located plus it contains all of the part numbers.

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1 Answer

Air Compressor will only pump up to 35lbs.


The two main areas to inspect if your pressure isn't going over 35psi are the valve plate and piston/cylinder assembly. If the reed valves on the valve plate are bent, warped or broken, usually attributable to high heat, they won't seal well enough to get higher pressures. If the cylinder is badly scored or the piston and/or piston rings are damaged, usually attributable to running the pump motor with low or no oil, the seal between them won't be good enough to get the pressure any higher.

Aug 13, 2012 | Craftsman Air Tools & Compressors

1 Answer

Graco x9 won't hold pressure


If it comes up to pressure but won't hold it when the motor stops, you have either damaged packings or a bad check ball-to-seat seal. If it's the check ball(s) not seating properly a real good cleaning should take care of it. If it's the packings the only remedy is to replace them.

Aug 11, 2012 | GRACO INC Magnum Pro X9 Electric Airless...

1 Answer

440i titan only pressure is between 0-200 psi no matter the setting


If an airless paint sprayer won't prime it's usually because one or both check balls are stuck. First try hitting the head where the pump is sharply with a hammer, hard enough to knock the balls loose but not so much that you do any damage to the pump. If that doesn't free them up you may have to take the pump apart and clean them and their seats.
If an airless paint sprayer won't develop pressure, it's usually because the packing rnigs are damaged or collapsed. The only way to check this is to totally disassemble the pump and check them. Also look for any damage to the piston and cylinder. They must be very smooth and shiney, if they are scored they will eat up any new packing rings you put in.

Jul 19, 2012 | Titan 440 Impact Airless Paint Sprayer...

1 Answer

Graco magnum paint sprayer won't prime


Airless won't prime- I always start trouble shooting an Airless that won't build/hold pressure look at sump hose inlet filter (the hose that goes into the paint if its got paint debris on it clean off filter and pour the paint thru a strainer bag into a clean 5 gal bucket-also remove the filter housing on the spayer and clean and flush and replace filter and housing- the shaft or the metal sleave has two ball bearings called "check balls" that maybe stuck turn on sprayer and put a piece of wood on shaft and give it a few good taps this will knock the check balls loose if after all this fails then you need to have new packings put in becuase the old ones are worn this is pretty easy to see because the rod the compresses the paint will have signs of paint on it indicating that the packings are worn.. Note keep rod and other moving parts oiled ith graco throat seal and finally Graco sprayers with the X on them are there (Graco) home owner line of sprayers that sell at home depot they are rated for only a certain amount of Gal per year keep it in good condition and cleaned store with coro-check inside of the pump when you are done using it.....

May 27, 2012 | GRACO INC 232745 Magnum XR-7 3/4-HP...

1 Answer

My kobalt air compressor model#215914 won't stop running is it suppose's do that?


All compressors run up to their rated high pressure level, usually listed on the data plate on the compressor or in the manual, then the pressure regulator turns them off. If your compressor is not shutting off it is either not getting to the pressure it takes to get the pressure regulator to turn it off or the pressure regulator is broke and won't turn the motor off. To check which, turn the compressor on and watch the guage that shows tank pressure. If the pressure rises then stops at a level below the rated pressure for your compressor and the motor continues to run, you have a leak somewhere. It could be the tank drain valve, the lines from the pump to the tank, the valve plate or in the piston cylinder area. If the pressure rises more than ten psi above the rating for your tank, your pressure regulator is broke or possibly set too high. If you know how, you can try lowering the shutoff point to see if that fixes it but you're usually better off replacing the regulator.

May 09, 2012 | Air Tools & Compressors

1 Answer

Motorcycle won't idle


Hi Gary, and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
5. Plugged low-speed jet.
6. Contaminated or plugged low-speed circuit.
7. Enrichner valve not seated or leaking.
For more information about your issue please visit the websites below. Good luck and have nice a day.
2007 Yamaha Motorcycle Service Repair Manuals

May 03, 2012 | 2007 Yamaha V Star Custom

1 Answer

My car is running hot, and I dont know what to do.


{: ) You didn't mention the model of your vehicle. Anyway, we can try some cooling system basics.
You can begin checking with the things that keep the engine cool.
1. The coolant. Are you using plain H2O? Check the coolant level and also look for signs of coolant leaks.
2. The radiator. Check for obstructions at the radiator area like plastics and debris. Foreign materials could have accumulated on the radiator fins. Clean if necessary.
3. Cooling fans. Check for damages or cracks. Is it operating at expected speeds when it should be? For example, at 106deg it works on low speed, at 110deg it should spin high speed. If it stays on low speed all time or none at all, check the fan relays and fuses.
4. Water pump. Is it noisy? Have you checked the belt? It may be old and cracked, better replace it. If a thermostat is stuck, coolant won't circulate and engine will heat up fast to undesirable levels.

How about the other things that add more heat to the engine?
1. Engine pulleys getting stuck. A/C, water pump, steering pump, alternator, idler and tensioner pulleys.
2. A/C system high pressures on the condenser.
3. Oil level and pressure low
4. Poor engine emissions performance. Engine timing, tune-up, clogged exhaust pipes
5. Stuck brakes or bearings
6. High ambient temperatures
7. Poor wheel alignment, low tire pressures

I hope I didn't miss out on any other more important things to include. Wish you goodluck.

Jul 24, 2011 | Buick LeSabre Cars & Trucks

1 Answer

Wagoner Procoat Airless Sprayer without manual. Won't prime.


One cause for this is that one or both of the check balls in the piston are frozen in place. This can be caused by drying paint on the check balls or seats or, as is the case many times in our area, if you did clean the machine well with water without any airless conditioner in it, sometimes the water dries and leave behind minerals that 'lock' the check balls in the seats. Set the machine up in water and turn it on to prime. Using a hammer hit the pump head where the piston is working fairly hard. You are trying not to break anything but knock the check balls loose. If they come loose and water starts cycling through the system, let run a while to wash anything out before switching to paint. If this doesn't work, you may have to take the head apart to see why the check balls won't free up. It could be because of peices of dried paint that won't come loose by themselves.

Jun 16, 2011 | Garden

1 Answer

Sprayer will not stop pumping when switched to pump mode after primed it will not shut down it just keeps pumping. .


Paint sprayer.
Flip lever down to prime > paint comes out small plastic hose.
Flip lever up to put pressure on spray line.

Problem: prime keeps running and spray line never gets pressure.

Future solution:
You did not clean sprayer very well last time, or it is rusted. When cleaning, run full 5 gallons of cleaner through machine twice.
You should fill spray line and pump with kerosene if machine sits idle more than few days.
We all forget.

Good news: you have prime. If machine doesn't prime, you probably have to disassemble.

More good news: There are two steel balls inside pump. Tap top one with hammer to loosen. Keep machine running. Keep lever up. Start tapping top one. Tap a little harder... keep tapping ... sometimes it will not free up ... take apart pipe and see if you can nudge ball loose >> be careful not to scratch anything... the sprayer is high pressure and all parts have to fit
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Oct 07, 2010 | Garden

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