Glow Plug Indicator

[gilbertmsg]

I have a TU 1700 and this afternoon, turned switch to heat glow plugs for a 10-15 second warm-up as normal. After about 5 seconds wire started to turn red and I then noticed very hot glowing red and shortly thereafter burnt indicator wire. What went wrong? and can I find a wire at local tractor shop?

 

[mopacman]

one thing it could be is a shorted glow plug or wire going to the glow plugs....Larry

 

[mit]

from what i was told the glo plugs do not short out. they will go into open and will not glow.so i will guess it could be faulty wiring to the plugs or the glo indicator wire just got blown like a light bulb. it could have reached its lifespan. the tractor dealer do not have the wire but u may be able to get a used part.try Used salvaged tractor parts including John Deere, Ford, Kubota and other Japanese tractor part dealers or Valley Power or Sparex Ltd is a world leader in the supply of Replacement Parts and Accessories for agricultural tractors and machinery.

 

[lens12]

Sparex only sells through dealers.

 

[gilbertmsg]

I have fairly new glow plugs so don't think they are bad. Can I use a piece of copper wire and bend it around the posts to achieve my goal. Thanks for the posts.

 

[mopacman]

No. The indicator is a resistor that drops voltage to the glow plugs. If you use a piece of wire you will burnup your plugs......Larry

 

[mit]

the glo wire is resistive it may be anything from 1 ohm to 3 ohms of resistance.plus it has the ability to increase in resistance as it gets hotter.it will limit the current to the glo plugs and prevent burn out.copper wire is too conductive to use.you need something like a tungsten alloy wire of the proper guage.get the part replaced is the right thing.

 

[mit]

the wire from inside a old toaster may do the trick.about 2 inches of the toaster wire element may work. or the wire from the old hot plates.

 

[mit]

i saw some element wire on this site:eBay lets know how u made out.

 

[gilbertmsg]

Obtained a piece of wire from old heat pump coil. Replaced on indicator and turned key to heat glow plugs. Wire turned red way to fast. I started checking and found that the first glow plug in line had the head broken off. I not sure what caused that. Took out broken plug and replaced with one of the old ones I had left when I changed these this spring. Turned key again and still the coil turned red very fast again. I stopped before burning the wire again. The new wire is not as large as the original equipment on the tractor. What could be causing the indicator to heat up so fast? Comments are appreciated.