Have a 300 gal Hardi sprayer with 40' fold up boom. It will run along great than it'll start spraying out around the tank mix valve and pressure will start dropping. Stop shut it off wait a minute than go again and back to normal then a few minutes later same thing. I replaced all the suction hose a few years ago screens are good pipe inside the tank is good cover gaskets and the round rubber in front of the pump all new. Tks for any help.
- Thread starter Philip d
- Start date
Josh-nhihguy
Member
Not sure exactly. Do you have a picture? Is the valve cracked maybe?
flying belgian
Well-known Member
I don't know what you mean by "tank mix valve"
So you have a big round thing. Fluid from tank goes to it first. It has a dial with L C R. These 3 lines go to boom. Then there is a pressure relief valve with something to adjust pressure. Then fluid goes back to tank to agitate chemical. So your lcr thing is leaking. They won't take over 60 psi. Might need to slow uour motor down. But you can buy a new one from Northern. Even if not in your catalog. Call them during the day. The guy will fix you up. We have Ohio valley ag. They have everything including knowledge. Hope this helps Vic
Every part on a Hardi sprayer is Hardi's. That is what makes their parts so expensive. They do not operate like a "regular" sprayer with a centrifugal pump. I presume you have a diaphragm pump.
I think you are in Canada, but this dealer in Ohio only business is Hardi sprayrers Kahr's Tractor Sales 1-419-335-1638.
I know strange name for a sprayer dealer. Tractor dealership long gone.
Todd Kahr will have your answer in a minute. He knows Hardi sprayers inside and out. This is where I get my Hardi parts.
Hardi sprayers can be a bit difficult with all the internal valves and oring fittings.
I am on my second Hardi. They are great sprayers.
I think you are in Canada, but this dealer in Ohio only business is Hardi sprayrers Kahr's Tractor Sales 1-419-335-1638.
I know strange name for a sprayer dealer. Tractor dealership long gone.
Todd Kahr will have your answer in a minute. He knows Hardi sprayers inside and out. This is where I get my Hardi parts.
Hardi sprayers can be a bit difficult with all the internal valves and oring fittings.
I am on my second Hardi. They are great sprayers.
I have the same sprayer as you, a Hardi 300 gal. I can get it spraying in the 30-40 psi range but lots of times preasure starts to drop, then i start turning the recirculation knob in to get the preasure up, 2 min later the preasure bolts and the nozzels are leakin solution, then im turning the recirculation back down. This seems to be the pattern. I wish i would have left it at the auction!!!.....John
Ken Macfarlane
Well-known Member
Do you mean this thing?
Ken Macfarlane
Well-known Member
Coming out the packing on the valve handle? Is there a restriction in your return line? If you take the handle cartridge out there?s a few o-rings I think. Might so crud jamming the spool / diaphragm that the pilot pressure works against.
Ken Macfarlane
Well-known Member
The piece held in by the pressure adjusting knob moves back and forth to compensate for changes in flow. If its sticks you can get your symptoms.
Parts diagram
Parts diagram
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