Eric_Phillips
Platinum Member
I was out trying to calibrate my tractor speed and pump pressure to spray my weeds so I can get my lawn in. My problem is that the sprayer manual says if I spray at 30psi at 5mph I should get about 10gal/acre. This is all well and good but I cannot get enough back pressure with the sprayer on to get any reading on the guage. The guage sucks since it is in 10 psi increments but does not start until 20 psi. When I close the valve the pressure goes up to 100-200 psi. It is hard to tell since with the valve closed there is so much vibration that the needle is vibrating all over the place. With the valve open the needle very calmly sits at 0. I have turned the pressure adjuster both ways and no luck. I just looked at the nozzles they say Lurmark 02F80. Are these the right tips? Any suggestions on geting the back pressure up? I am using a hydro 6500c pump. I am running about 2000rpm on the engine. About 2600 rpm gives 540rpm at the pto.
Thanks,
Eric
Thanks,
Eric