Sprayer looses pressure pump issue ?

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

Air leak in your holding vessel...

Air leak somewhere between the pump and the spray tip (s).
that will incllude the 25 gallon tank as a possible place to check for leaks!

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.

Did you ever figure out the issue?

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

It sounds like there is a leak in the system allowing pressure to drop.

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

Have you unscrewed the end off the wand?Do that and pull the trigger to flush out any debree

Disconnect the sprayer boom hose from Y splitter, and dd another Y splitter, then reconnect the boom hose to one side of the added splitter. Add a washing machine supply (female/female) to the other side of new Y. now attach garden hose to washing machine line and turn on the water faucet with pump running. This will charge and/or backwash the pump. Once pressure is achieved, turn on the boom and check for fluid movement, then turn the washer supply valve on Y to off, and disconnect. The pump should be primed and be cycling fluid from tank and back to tank. Ready to shift to boom for use. I leave the washer hose and assembly zip-tied onto sprayer for easy future priming, and pump wash between uses.