Posted by VTHokieAg on June 14, 2014 at 16:51:51 from (71.113.14.100):
So I have resurrected my granddads 1960 B-275 that has been sitting for about 7 or 8 years. One of the things that I can NEVER remember working on the tractor was the glow plug system. My granddad always used a shot of ether to start it.
I am interested in getting the glow plugs working so I started digging into it today. I took the dash panel off to see how the wiring was and make sure somebody didn"t rig something up over the years. Low and behold wiring is all there so I checked some voltages with my multimeter. I have 12.65 volts on the turn switch. When I put the multimeter on one battery cable and touch it against the first glow plug wire I get 0.00 volts when the switch is not turned (seems correct so far to me) and when I turn the switch sometimes I will get a reading of 12.65 volts and other times I will get a reading of 6.5 volts. The 2 voltage variances can be different literally seconds apart from the other.
I believe the indicator on the dash is a resistor (correct?) and the reading at the first wire on the glow plug should be 6 volts??
Where do you guys suggest I start? Does it seem like I need a new resistor or all new glow plugs? I am probably going to buy all new glow plugs anyway since they are cheap but I don"t know if I need a resistor. The resistor gets really hot, which I assume it"s supposed to anyways when functioning correctly. What is the resistor indicator supposed to do anyways when working? I didn"t even know if mine was getting any power at all until I took the dash off and noticed it was hot. Otherwise, if it is supposed to light up or something mine does not do that.
Another question, when the system is working correctly how do you go about using the glow plugs? I am not familiar with them especially on an old tractor? How do you know how long to hold the switch down for?
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