Re: Darned Old Tractor!

Posted by r4etired on October 10, 2006 at 15:43:20 from (152.163.100.65):

In Reply to: Darned Old Tractor! posted by Allan In NE on October 10, 2006 at 01:39:13:

Allen You are right most likely the control valve or a partially plugged coil, The coil itself doesn't care which direction the coolant flows,as the connections are straight in and out on a horizontal coil. If the coil is installed vertical then the lowest inlet must be the supply port, The control valve is a disc type valve, a quarter turn from full open to closed,if the operator linkage is bent or wore it can cause the valve never to fully open. Most coils of that size require approx 1.6 gpm of flow to heat at max, thats assuming engine coolant of 180 deg and 170 at the coil and a 10 to 12 degree drop across the coil.You could pull the hose on the return and see how long it takes to fill a gallon can with engine at working rpm. On my own tractor the coil was partially plugged so I just mounted a 1.5 gpm 12 volt Sure flow pump in the return hose, put a toggle switch on the dash and control it manually

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