475 Backpack Sprayer Back Pack Sprayers

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Dont !!!!! just buy a new one bout 100 bucks but if u want it comes out thru top but u have to take lose underneath
way too labor intensive for the price of new one

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While squeezing shut-off, pump sprayer until all liquid is expelled. 3. Continue squeezing shut-off without pumping to release all air pressure.
If you are experiencing lost or low pressure on your sprayer, check to see if the filter in the backpack is clogged. Some clogs can be fixed as easily as spraying water into the empty backpack to flush out the filter. Rinse out the tank a few times and see if that fixes the problem.
If no pressure is felt then the sprayer isn`t getting pressure in the first place, so the most probable cause is a faulty, missing or dry plunger O-ring or leaking non return valve. Replace or lubricate as necessary.
If the spray rate is not reasonable for your particular spraying job, you can change output by one of three methods: adjust pressure, change speed, or replace nozzle tips. If only a minor change in output is needed, simply make an adjustment in pressure and determine the new average nozzle output.
Fluid leaking from backpack sprayers is a common problem. Leaks may come from the lid seal, the vent, pump, or wand. Often, leaks are caused by improper or no maintenance. Lid seals and rubber vent seals should be lubricated with silicone grease or petroleum jelly.

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I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?
ANSWER :

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Leaking oil through the casing – Karcher K2.26 Electric Power Washer
ANSWER : Up end the unit and get to the sump plate of the pump
remove the big screws that hold it on and there is a big”O” ring that is the seal
replace that “O” ring and use silastic blue sealer and reassemble it

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Won't seal and hold pressure – Ace Hardware Acer Spray and Go Sprayer
ANSWER : Try smearing some Vaseline on the gasket that goes around the pump shaft at the top.

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Honda powwer boss 3000-whenyoupull the handale to spray it kills the engine
ANSWER : Sounds like the unloader (regulator). Try removing the nozzle, the pull the trigger with the engine running. If motor is still running then it could be the Unloader malfunctioning. If you require a new one try a bypass system for the unloader. The bypass will help save the life of the unloader.

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I know this is a pretty old thread. But I have a 2004 Husqvarna 359 and it does the same thing. Has anyone found the cause of the problem yet. It seems to die from lack of fuel or too lean of a mixture only when the saw is hot. I have : removed the cylinder and found it to be scored very bad, i replaced the cylinder and piston, replaced the fuel filter, removed the carb and checked for debris, new spark plug, new air filter, changed fuel to a 32:1 just to see, all to no avail. I dont know how to test the ignition module, and I dont know if there is a way to test the cranck shaft seals. If any one can give me advise from here it would be greatly appreciated. Thank You, Brian in Spokane Wa.
ANSWER : I didn’t want to close the thread in case someone else had some ideas. We can still discuss this problem. Enter any clarification or additional information below the advertisements. HTH
Lou
Hoped Dolf would chime in.

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Starts great and sprays great, but will not continue to run when [ stop spraying. It locks up until I release the pressure from the gun.is there a pressure by-pass adjustment I can make?
ANSWER : Tune up motor, replace air filter/spark plug and oil.

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I have a 2000 psi simonize gas fired..Can.t get any water when pump is running. I took the. water pressure hose off on unit and still no water
ANSWER : If the unit has been stored you need to remove the bottom three plugs on inlet side of pump head and simply free the checkvalves that are in closed position needle nose recommended and small screwdriver to pry them open this is caused by the impurites in water that dry up and seals the head and disc together:):)

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How do i replace a pull cord on a xt7 pressure washer
ANSWER : Try this link:http://www.youtube.com/watch?v=Q3NjVomUQJMThere are others there as well.Best regards, –W/D–

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My name is June Strandberg, and I am a florist and gardener in San Francisco. I have been working in the industry for five years, and I love helping people find the perfect floral arrangement for their special occasions. I am also skilled in troubleshooting and fixing gardening tools, so if you are ever having trouble with your tools, please don't hesitate to reach out to me.