66 series question

[DJL]

Quick question, what is the red light for on the right side of the dash on a 66 series IH, specifically a 766?

Is it suppose to be lit only when you push the clutch in? What"s it mean when you push the clutch in and the red light blinks in an irregular pattern?

Thanks
DJL

 

[buzzinduzzin]

the mcv pump delivers its output to a series of priority valves , the order is: steering,brakes,t.a. control, &last lubrication. the idiot light is on the lube side. there is a high priced self contained bulb that blinks. if that is what is on your tractor that could explain the irregular. also after hard use & oil is up to full temp it is normal for light to blink at idle

 

[the tractor vet]

Ah nop it is not normal for the lite to blink when the oil is hot at and idle , if the lite is blinking you have low out put on the pump or the sender is bad.

 

[the tractor vet]

Ah nop it is not normal for the lite to blink when the oil is hot at and idle , if the lite is blinking you have low out put on the pump or the sender is bad.

 

[caseyc]

Since your question wasn't quite answered, yes, the light should be on when the clutch is depressed and off when the clutch is released. If it blinks, then something is wrong. Tractor Vet is very knowledgeable. You can count on his advice.

Casey in SD

 

[pete 23]

I will add to the blinking part of your question. It may or may not have a flashing bulb. It all depends on who put a bulb in it. You can easily tell if it is a flashing bulb by just turning the key on without starting the engine. If it flashes then you know it will also flash when you push in the clutch. If it burns steady when not running but flashes when running with clutch in you have some slight leakage into lube system. Far as irregular, those little flashing elements in those bulbs are not real sturdy so it if probably just a poor bulb. I always use steady burning bulbs for replacement as too many times the flasher is not dependable. You would need to put a gauge in where sender goes to get a good reading if you feel it is a problem.

 

[Owen Aaland]

The flashing bulb is number 257. Replace it with number 1895 for a steady light.

 

[buzzinduzzin]

We had 3 brand new 1466s (years ago) & I can promise you that every one of them would have the lube light blinking at full idle after a good work out 6-16" gumbo ground!! idle for 15 20 minutes , cool oil down light quit blinking.

 

[Owen Aaland]

(quoted from post at 21:26:12 09/22/12) We had 3 brand new 1466s (years ago) & I can promise you that every one of them would have the lube light blinking at full idle after a good work out 6-16" gumbo ground!! idle for 15 20 minutes , cool oil down light quit blinking.

Working at a dealership when those tractors were sold new if we found any like that they would have been repaired!

If it doesn't hold at least 18 PSI lube pressure you've got a problem somewhere.

 

[ChrisGS]

Resurrecting an old post, but my light it flashing when the tractor is off and key is in the off position. I swapped out the starter solenoid a few days ago and replaced a bad positive battery cable as well. The only thing I can think of is that I incorrectly wired the flashing light wire to the starter solenoid. I'm hoping someone can help me out here, it's a bit annoying to disconnect the battery every time I'm done using the tractor.

 

[Janicholson]

Welcome to YT forums and PartsASAP
If the only wires you changed were at the solenoid, one is likely in the wrong location. There are differences between 66 series, so model may make a difference. Assuming it has a Key on off switch that requires a seperate action to shut down the diesel, maybe that switch is on, or failed. Jim

 

[used red MN]

What model is it, and is it a gas or diesel? If it’s a diesel it’s not to likely you messed up the wires on the starter unless someone did some goofy rewiring. On a diesel you have the large terminal that the battery cable goes on. Then you have two more small heavier wires that go on that terminal with big eyelets on them. Then you have a wire that activates the solenoid that goes on the small terminal labeled S. Given the size of the terminals there is really no way to mess it up. My guess is you moved some other wires around and maybe a bare spot was worn in the insulation or a terminal was loose a came out of place and that is causing your issue.

 

[ChrisGS]

What model is it, and is it a gas or diesel? If it’s a diesel it’s not to likely you messed up the wires on the starter unless someone did some goofy rewiring. On a diesel you have the large terminal that the battery cable goes on. Then you have two more small heavier wires that go on that terminal with big eyelets on them. Then you have a wire that activates the solenoid that goes on the small terminal labeled S. Given the size of the terminals there is really no way to mess it up. My guess is you moved some other wires around and maybe a bare spot was worn in the insulation or a terminal was loose a came out of place and that is causing your issue.

It's a diesel 766. The wiring is still factory, and what you described about where the wires go is how I currently have it hooked up. The other large terminal on the solenoid doesn't have a single wire that gets hooked to it correct?

 

[used red MN]

The other large terminal on the solenoid doesn't have a single wire that gets hooked to it correct?

That is correct, the other large terminal just has the feed strap for the starting motor attaching to it. The system up under the dash for the most part should have no when the ignition is off. Only the lights should have power when the key is off. Some how power is shorting over to the tell tales circuit.
Here is a link to a wiring diagram for the 66 series, make sure you reference the right diagram section per the labeling. IH 66 series wiring diagrams

 

[BarnyardEngineering]

It's a diesel 766. The wiring is still factory, and what you described about where the wires go is how I currently have it hooked up. The other large terminal on the solenoid doesn't have a single wire that gets hooked to it correct?

The flasher is supposed to connect to the light switch, which gets its power from the ammeter. There is no direct connection to the starter.

Check your light switch. The first position is the flasher.

 

[used red MN]

It's a diesel 766. The wiring is still factory, and what you described about where the wires go is how I currently have it hooked up. The other large terminal on the solenoid doesn't have a single wire that gets hooked to it correct?

Chris, just to clarify the light you say is flashing with the key off is the red tell-tale instrument lamp in the gauge cluster, is that correct? I think barnyard e has it confused with the actual “road flashers” that is why he is saying it is powered by the lights. Or maybe he is directing us to the correct problem?

 

[BarnyardEngineering]

Chris, just to clarify the light you say is flashing with the key off is the red tell-tale instrument lamp in the gauge cluster, is that correct? I think barnyard e has it confused with the actual “road flashers” that is why he is saying it is powered by the lights. Or maybe he is directing us to the correct problem?

That's exactly what I'm describing. That's what "flashers" are to me. I can think of a dozen different things I'd call the light on the dash before I'd use the term "flasher" or "flashing."

In fact I don't think I've ever seen a flashing tell-lite.

 

[used red MN]

That's exactly what I'm describing. That's what "flashers" are to me. I can think of a dozen different things I'd call the light on the dash before I'd use the term "flasher" or "flashing."

In fact I don't think I've ever seen a flashing tell-lite.

This thread that Chris resurrected is all about tell-tale lamp, it would seem odd to me that when he says “lamp” that it would mean anything else, but that is why I asked for the clarification from him. Do you remember Pete23? Maybe you thought he was also full of beans! I personally think he was probably one of the most knowledgeable guys that posted here on IH tractors. How about Owen Aalund, also seemed knowledgeable on IH stuff to me. You might check their replies above and then reconsider your last sentence. Or I should say maybe you haven’t seen one but IH tractors left the factory with them. On the 656 we had the tell-tale light flashed. That was key on engine not started, that tractor had a mechanical TA so low engine oil pressure was all that the warning lamp was for.

 

[BarnyardEngineering]

This thread that Chris resurrected is all about tell-tale lamp, it would seem odd to me that when he says “lamp” that it would mean anything else, but that is why I asked for the clarification from him. Do you remember Pete23? Maybe you thought he was also full of beans! I personally think he was probably one of the most knowledgeable guys that posted here on IH tractors. How about Owen Aalund, also seemed knowledgeable on IH stuff to me. You might check their replies above and then reconsider your last sentence. Or I should say maybe you haven’t seen one but IH tractors left the factory with them. On the 656 we had the tell-tale light flashed. That was key on engine not started, that tractor had a mechanical TA so low engine oil pressure was all that the warning lamp was for.

Seems I can't say the sky is blue without offending you. All I said is I've never seen a flashing tell lite. I've been in the seat of these tractors for the better part of 50 years. Currently own three of them. None of them have ever flashed. Push the clutch pedal, solid red light. No flash.

The only flashing light on these tractors that I'm familiar with is the flasher on the fender and that is what I thought the thread-resurrector was asking about. That's it.