When I pump my sprayer the pressure does not hold. The sprayer is new, about 3 weeks old.

seems as the PSI based switch maybe having issues inside the pump most likely

Air leak in your holding vessel...

like most pumps; air, hydraulic, etc. there is a one-way valve with a ball or flap mechanism. If a small particle gets stuck preventing it from sealing, it'll leak pressure preventing it from building up. an easy way to try to clean this valve is to apply some air pressure to the hose end of the sprayer while operating the handle. your instruction booklet may cover this.

you just have to hold down the trigger till all the pressure is drained off

You can take the intake part of the pump apart and clean/lube the diaphragm of the pump. If you didn't clean it out last time it was used there will be residual or cake built up. Make sure the down snorkel is clear and doesn't have any contamination in the tube. Check the screen/filter also.

If sprayer doesnt seal against pressure, I suggest check cover gasket A (image 1). Check pump cylinder gasket B (image 2) and additionally, check the procedure if pump dont build pressure. on how to remoce pump cylinder on follow lines.



If pump doesnt build pressure... in most instances, failure of the pumo to build air pressure in the sprayer is due to dry or worm plunger cul leather. To work on cup leather, always remove plunger from pumo cylinder. Do not attempt to oil cup leather through breather hole in **** cap.

First, unthread pumo cap A (image 1). If cap is too tight, and if pumo will build even slight temporary pressure, pressurizing the tnak will make it easier to loosen cap. Once cap is lossened, release tank pressure. Hold pump cylinder by inserting hand through tank filler openning (image 2), and unscrew cap all the way. Pull plunger from cylinder, and remove cylinder from inside the tank.



Place a few drops of clea oil (not heavier than SAE 30) on leather, and massage into leather until it is soft. Replace plunger cup leather if damaged (image 3). to remove plunger leather assembly, use coin rather than screw driver in the slot of the plunger cup retainer. To reassemble, hold pump cylinder in tank openning, with squared edge of flange, at top of cylinder, toward tank wall.



Hope this helps to solve it.

Check under the lid/cover for a rubber gasket. This may have gotten unseated when putting the sprayer top on. It must form a tight seal around the lip of the sprayer top in order to keep the pressure. Alternative: Put water in the sprayer leaving some air on top to build pressure. Put a few drops of dish soap inside and gently stir. Put the cover on, and tilt the sprayer to coat all areas at the top. Start pumping and see where the bubbles come out---there is your leak. If it is near where the sprayer hose enters, and it is a permanent mount, you may have a bad seal. If the sprayer hose unscrews, you may need a new rubber washer inside. If bubbles come out of the wand, or other plastic seams, you may have a crack in the plastic. Depending on the location, you could epoxy over the crack to seal it permanently. Good luck.

Hi there
There are many possible reasons for your sprayer not pressurizing. If the pump lever is moving freely and does not seem to be building pressure while pumping it is possible that the O-ring at the valve is damaged, the seal in the pressure regulator is leaking, the piston or the collar is worn. Any of these problems will require disassembly of the unit and inspection of each part. If you do feel resistance building as you pump but quickly loose pressure you likely have leaks in the diaphram, it's seal, the pressure cylinder or the tank itself.
If you are comfortable disassembling the unit and inspecting the parts for wear or damage most of the individual replacement parts are fairly easy to replace and readily available online from Solo or at many retail outlets and supply companies. Solo has done a great job with how-to videos and instructions for each procedure on their web site www.solousa.com
If you are not comfortable disassembling and repairing your sprayer yourself you can try contacting a mower/equipment repair shop in the Redding area as is seems the nearest Authorized Solo sprayer repair center is Cloverdale Saw in Cloverdale CA, 707-894-2273

Take the strainer at the end of the hose on the tank off. Throughly clean it. I used an old tooth brush, then ran hot water through it several times. Also drained the tank and flushed it out 3-4 times with fresh water, then ran fresh water through the pump for several minutes

Hope this helps

Remove spray tip and clean with a paper clip, Check pump oil resevior and add 10w 30 pump oil if needed, also look for turn knob ,usually black with -+[plus /minus symbols ] and turn towards plus for extra pressure. May need new pistol/wand assembly and make sure hose is clear by seeing if water will run through hose freely and generously.

Thanks Kf1013 and please vote me a Fix Ya!!!

JJ505