Posted by Dean on September 05, 2020 at 12:32:34 from (68.39.250.176):
Last spring I bougnt a small 50 gallon 3 Pt mounted sprayer for use with one of my small Kubota tractors.
I bought a small 50 gallon sprayer with a 12' boom so that I could use it in my irregular shaped and some places steep lawn as well as to spot spray in my small 20- acre hay field which has become infested with Canadian Thistles and, more recently, dogbane.
We had a severe drought last fall so I did not use my new sprayer because there was not much to spray. Of course, the warranty has now expired.
What a difference a year makes. Lots of rain this summer and things growing like crazy so bought (different) chemicals to spray both dogbane and Canadian thistles.
Today, I mounted the as yet unused sprayer onto the small Kubota tractor which I deemed most appropriate for my purposes so as to check things out before tackling the spraying jobs tomorrow.
Sprayer has a PTO pump. Seller and manufacturer's rep. both recommend about 28 PSI at PTO speed considering the nozzles on my sprayer and my purposes. Manufactures materials recommend about 4+ MPH at approximately 28 PSI for my purposes.
Never used a tractor mounted sprayer before so decided to fill tank with about 25 gallons of water today so as to check things out before spraying project tomorrow.
WTF? Cannot control pressure except by engine/PTO RPM. Makes no difference whether valve is in spray or agitate position. Also makes no difference how far I turn the handle on the pressure regulator.
Pumped 20+ gallons of water through this small sprayer this afternoon in about 15 minutes because pressure would skyrocket to 100 PSI at PTO RPM. Turning handle on pressure regulator makes no difference. Sounds like a bad regulator to me but, who knows.
Planned to spray various places for various weeds this long weekend but do not wish to waste expensive chemicals. T & I dealer will not again be open until Tuesday.
I have never before used a PTO mounted sprayer. Am I missing something?
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