Glow Plugs not working.

[Jg1]

I have a Cub Cadet 7195. The glow light doesn't come on and I checked the 3 glow plugs individually, they all checked out ok. I've aquired an electrical schematic and it doesn't show any relay, I've looked for one but can't find one. I followed the schematic and it looks like it's being fed from a fusable link. It's not being fed from the fuse box. Does anyone know where I can find this fusable link or relay? Or does anyone have another suggestion.

Joe

 

[gimmodog]

if you post a pic of the schematic we might could give you some ideas on where the problem could be.

 

[Jg1]

I don't know how to send a picture on this site so here is the download. http:MediaFire.com/file/mjo52td22em/Cub/7195_Hazard0001.PDF

 

[Jg1]

The last part of the site after em is /Cub/7195_Hazard0001.PDF

 

[Jg1]

That didn't work. If you go to Cub Cadet 7195 hazard. Click on the first link about electrical problems, scroll down to oldmachinest and click on the highlighted site. You can download that one.

 

[Jg1]

Yes, no voltage

 

[thepumpguysc]

I don't have the schematic but a few places to look for the problem are>
Key switch, "IF" its activated w/ the key & not a push button.
FUSE or fuseable link.
IF it indeed does have a f. link, follow the wire if u can.. it'll be the bulge in the wire..{usually}

 

[greggyy]

I was told old International tractors are pigs too start,

I bought one anyway, good news, starting is fine as long as about 10c or so, noticed glow plugs not working, started to look into it, then realised I wont need it to start easily on the really cold days anyway, so, left it along.

Ironically starts much better that the one that glow plugs work on even on warm days and being 30 year younger Jap design.

So, do you *need* glow ?

 

[gimmodog]

I don't know how to send a picture on this site so here is the download. http:MediaFire.com/file/mjo52td22em/Cub/7195_Hazard0001.PDF

to post a photo click on "GO ADVANCED"
then click on the little square with the tree in it (if you hover over it it will say "insert image"
click "choose files" and pick the photo you want to post
click "upload files

 

[Jg1]

Try this.
File sharing and storage made simple

 

[Jg1]

Cub7195_Hazard0001

 

[Jg1]

Thanks for the info, sounds like a much better place to start than looking for the FL in the wiring harness. I didn't know the ignition switch could handle that kind of amprage. I have to wait until later in the week and I'll get back to you.

I did take a #12 gauge machine tool wire from the battery to the glow plugs and waited for a 25 second count. Turned the ignition switch and it started right up like it use to. Machine wire can handle more amps than a regular wire because it has more stands of wire in it. Like a welding cable, lot of amps and more flexible.

 

[greggyy]

Or it could be like mine....where the wiring from switch to glow is completely fried....

 

[Jg1]

First of all I would like to say thanks for all your help. I won't be able to work on the tractor until the weekend (I hope).
I'm baffled on how this heating circuit works without a timer or relay to cut the circuit off once the motor has started.
When it worked you'd first turn the key to the on position and the glow light comes on and the glow plugs start to heat. Then I would wait 30 to 60 seconds and then turn the switch further to start the motor. Once the motor starts, the switch returns to the on position. I would think something has to change once the motor starts otherwise when the switch returns to the on position, the glow light and plugs would start all over again. That's why I think there should be a relay to shut the circuit off but I don't see anything on the schematic to stop the heating circuit. I've never left the glow plugs on long enough to see if it would time out.
I'm not an electrician but for the most part I think I know how things need to work.
I'll start at the switch, make sure I have power, then make sure the switch transfers power to where it should and try to work my way back to the plugs.
Like I said, I'm confused because something needs to shut the heating circuit off. If someone knows how this works, please let me know.
Thanks

 

[LouNY]

I have seen key switches where you had to go just past the run but not to the crank position for the glow plugs as well as those that you turn back one from off for the glow plugs.
Looking at the electrical diagram it would seem that that would be one of the ones that used a click counter clockwise from off for heat.

 

[Jg1]

Worked on my tractor today and found out I have a bad ignition switch. When I turned the switch on I had no voltage on G1 or G2.
I also took an ohm reading between G1 and the glow plugs, I had continuity so I knew the wire from the switch to the plugs was good.
Now to find a switch. Just started to look on line and two of the places say it's no longer available. I'll try my luck with an auto parts store. I guess I'm not as smart as I thought I was, I thought for sure there had to be a relay in there.
Thanks for the help.

 

[LouNY]

Worked on my tractor today and found out I have a bad ignition switch. When I turned the switch on I had no voltage on G1 or G2.
I also took an ohm reading between G1 and the glow plugs, I had continuity so I knew the wire from the switch to the plugs was good.
Now to find a switch. Just started to look on line and two of the places say it's no longer available. I'll try my luck with an auto parts store. I guess I'm not as smart as I thought I was, I thought for sure there had to be a relay in there.
Thanks for the help.

Looking at the electrical drawing I would not expect power on G1 or G2 in the run position, if that schematic is correct. Will that switch turn backwards one notch or push in in off or run?

 

[Jg1]

The switch does turn counter clockwise but not in.

 

[Jg1]

I guess reading what I had written it would sound like I turned it to the run side of the switch. I did not, I turned it counterclockwise to the glow plug side. That's when I check for voltage and I did not have anything on G1 or G2 to ground.

 

[LouNY]

OK, now it makes sense that you are looking for a new switch. If a new switch is not available, a high current push on switch should work.
Good Luck