Case IH 1240 Vacuum and Bulk Fan Flucuate - The Combine Forum
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Old 05-05-2011, 11:38 PM   #1 (permalink)
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Default Case IH 1240 Vacuum and Bulk Fan Flucuate

Brand New Case IH 1240 Pivot planter Vacuum fan and Bulk fan fluctuate Dealer has been out for 3 days can not figure out. using tractor hyd. no PTO pump. MX 305 with high flow pump. wondering if anybody has had the same problem very frustrating. Liquid fert is also not working properly
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Old 05-06-2011, 07:32 AM   #2 (permalink)
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our 1250 had the same problems you are talking about, but only on the vacuum part. Turned out to be just the coil on the hydraulic valve that controls the vacuum fan. The only reason we figured out it was just the coil, was that, the dealer gave me the wrong valve. The coil on the two were the same, so i swapped the coil out, and the vacuum went from bouncing from 12-18 in , to solid at 17.5 where we had it set.
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Old 05-06-2011, 09:00 AM   #3 (permalink)
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What is wacky it sometimes works ok. Sometimes its only the vacuum motor and sometimes only bulk fan or sometimes both the fert pump is pumping at max capacity and building very little pressure 4lbs at most and only putting on 1/4 of the fert we want. We did replace valve and solenoid for the vacuum fan and seemed to fix it for a little while but everything is so eratic!
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Old 05-08-2011, 11:33 PM   #4 (permalink)
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Have mx305 and a 1200 pivot, have had a lot of trouble with the remotes on the tractor. Run the up and down in number one, the vac and bulk on #2 and #3, liquid pump on #4. Make sure the return is plugged in good. I bet your remotes are going bad though, just had our 305 at the dealer and had new ones put in again before could start planting. Lost #2 and #3 when I was strip -tilling. Good luck and hope this helps, S
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Old 05-12-2011, 10:21 PM   #5 (permalink)
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If the fert pump is pumping fast but not putting any flow or psi out, then hydraulically, it is fine but you have a fert restriction or an air leak on suction hose. The tractor remotes can cause fans to fluctuate greatly. Try switching to different remote valves or maybe replacing hose ends (tips can become damaged internally causing flow to be blocked off). Could plug one set of hoses into power beyond ports (if tractor is equipped) and see if fan on that circuit runs smoother. You won't have to run a signal to power beyond if you are running another remote in continuous operation.
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Old 05-12-2011, 11:03 PM   #6 (permalink)
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In regards to the liquid, make sure it is calibrated or it will not work properly. Also there is an agitation outlet before the flowmeter in the system. Make sure dealer installed a tap in the circuit and that it is not wide open, it should just be cracked open or you will not build any pressure.
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