Pre-Heater power

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    • November 4, 2011 at 11:48 am #30443
      Little_Grizzly
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        I have the TY395 engine with a pre-heater instead of glow plugs.  Anyone have any idea how much electrical power the pre-heater draws?  I'm building a new wiring harness from scratch and I want to get the gauge / fuse correct.

      • November 5, 2011 at 1:31 am #33611
        Bob Rooks
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          I’d say 10 amp fuse w/ 14 GA. wire.

          By phone.

          Account deleted.

        • November 5, 2011 at 10:51 am #33613
          RichWaugh
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            Since the pre-heater is basically an injector and glow plug arrangement, I'd say use enough juice for one glow plug.  Or, do as Bob suggests and use 10 gauge wire and a 10 amp fuse.  If the fuse blows try a 15 amp – the 10 gauge wire can handle 15 amps, no sweat.

          • November 8, 2011 at 7:51 pm #33624
            Carl Darnell
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              10 ga wire is good for 30 amps.

            • November 12, 2011 at 11:14 am #33663
              circleg
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                I would think around 20 amps.

                http://www.circlegtractorparts.com

              • November 12, 2011 at 11:45 am #33672
                Little_Grizzly
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                  Thanks for all the replies guys. It turns out you are all correct.  I'm not a doctor but I play electrical engineer at work. 

                  It depends on many things but chiefly:  length, temperature rise, and acceptable voltage drop.  In this case since it's not going to be operated for very long you can also throw in duty cycle.

                  18 gauge would do it but with little margin in my mind. Almost 2 watts dissipated in the wire itself.  So something larger than that.  It would mostly likely come down to what connectors will fit nicely.

                  I will post pictures of course as well as a bill of materials when I'm done.  Don't hold your breath though.  I gotta wait until I actually have the tractor back.

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