The "leaks" in the air-blast sprayer were due to the air bleed port between the fan and the reservoir.
The air bleed is on the high-pressure side of the fan and pressurizes the tank so when it is open one can point the sprayer upward and it will still feed solution to the turbo-bell even though it is above the tank. The lever with the black knob controls the opening and shutting of a valve on the air bleed.
The quality execution on the valve that opens and shuts the air bleed leaves something to be desired. It never fully closes so it is not wise to load spray solution into the sprayer with the motor not running or idling. That is an issue because the manual directs the user to idle the motor for several minutes before running full speed and to idle it several minutes before shutting off. It is also an issue because the unit drools spray solution over the person carrying the sprayer.
The part about idling several minutes before shutting it off suggests that there are plastic parts near the motor made from low-melting point plastics. A hot shut-down and soak would cause those parts to overheat and deform.
Thank-you for your attention in this matter.
I have been looking at those sprayers. Can you replace the valve and have a workable machine?
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