Posted by bc on June 01, 2011 at 09:44:08 from (71.158.215.152):
Hi. I have a 25 gal. Fimco sprayer with a 12v 2.1 gpm flojet pump that quit working last night. I filled it with water this weekend and sprayed for a while and it worked fine. Then I added some roundup last night. It sprayed for a few minutes with the hand wand just fine. Had the return valve adjusted so it would put out about 50 psi when the hand wand wasn't being used.
Then nothing came out. If I closed the hand wand and let it build pressure for a couple seconds then it had enough pressure to spray for a couple seconds before dwindling down to nothing. I sprayed for a few minutes by opening and closing the hand wand until the pump motor just quit all together.
I have 12 volts going into pump motor with the switch off but when I turn on/flip the switch on the end of the pump, then the voltage reading goes to 0. The motor doesn't spin and it wasn't hot. With pump motor unpluged I get a 0 reading for resistance with the switch off but when I switch it on, I have continuity. The fuse on the end of the pump motor is not blown.
I figure the motor is either locked up or a winding went bad. This evening I will try blowing some air through it and take it apart.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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