Oil & Fuel Can't Believe This Happened

[MHarryE]

Well, now, that's interesting, and has got my mind working. My tractor has a low oil pressure light. With a little creativity and some relays, I bet you could easily wire that to blow the horn when it's on as well. Only problem is, the light comes on when the key is turned, but the engine is not running, and that would be annoying. Is there some lead that only has current on it when the tractor is running, and not just when the key is turned? That way, you could wire it up so that if the oil pressure light is on and the engine is running, the horn blows. My tractor is a diesel, so in theory it doesn't need electrics to keep running. On the other hand, something shuts down the engine when I turn off the key. What is that?

Engine oil pressure and timer. Oil pressure at start to activate relay providing power to the warning system, but with a timer so if pressure never achieved, warning system is activated.

We have models with both power to run and power to shut down. Power to run, something happens to the electrical the engine will immediately shut down. Power to shut down if you lose electrical you need to open the hood and hold the manual fuel cut-off switch until the engine dies. Or you can do what I recommended we put in the book - slap the cap the dealer gave you over the air intake.

With the larger engines and Tier 3 we started doing everything with the engine ECM so all sensors fed the ECM and it controlled warning lights, audible alarms, and we started doing things like automatically debating the engine in case of overheating or boost power if conditions said more power is needed and there was enough margin (like coolant temp) to over boost for a limited time.

 

[boggen]

1 key switch off
2 accessories on
3 accessories on and engine running (check for relay for this position and make sure relay is big enough to handle extra load)
4 accessories on/off and starting engine (release key causes it to go back to (3) above)

 

[joshuabardwell]

1 key switch off
2 accessories on
3 accessories on and engine running (check for relay for this position and make sure relay is big enough to handle extra load)
4 accessories on/off and starting engine (release key causes it to go back to (3) above)

I'm sorry, but I don't follow what you are trying to describe here. Condition (3) is what I am trying to detect.

 

[KennyV]

I..
.. is something on the tractor that only has voltage when the engine is actually running, that you could run a relay off of.

The alternator stator terminal only has power when the engine is running... KennyV

 

[Earl Ohl]

What about just using a good old-fashioned buzzer tied in with the oil warning light?

 

[k0ua]

As far as vandalism, many years ago at a nearby tire distributor, Vandals got into this distributor's fenced yard and loosened the drain plugs on about 20 delivery trucks. As the day progressed and the drivers started calling in with broken down trucks, there was no way to warn the remaining trucks to stop as this was in pre cellphone days. If I remember correctly just about all the trucks were damaged. Things like this can and do happen.

James K0UA

 

[94BULLITT]

It would be nice if a buzzer went off through the radio speakers when it got hot or lost oil pressure.

 

[ccsial]

It would be nice if a buzzer went off through the radio speakers when it got hot or lost oil pressure.

I did this on my airplane. If oil pressure, buss voltage, or vacuum goes low I get warning tone in my headset.

 

[Grateful11]

As far as vandalism, many years ago at a nearby tire distributor, Vandals got into this distributor's fenced yard and loosened the drain plugs on about 20 delivery trucks. As the day progressed and the drivers started calling in with broken down trucks, there was no way to warn the remaining trucks to stop as this was in pre cellphone days. If I remember correctly just about all the trucks were damaged. Things like this can and do happen.

James K0UA

No one noticed any puddles of oil when getting in their trucks? I'm not doubting what you're saying. I could see this easily happening especially if the trucks were parked on dirt or gravel.

If I spill a half a pint on concrete and seems to cover a 3' circle before I can get it cleaned up.

 

[ccsial]

No one noticed any puddles of oil when getting in their trucks? I'm not doubting what you're saying. I could see this easily happening especially if the trucks were parked on dirt or gravel.

If I spill a half a pint on concrete and seems to cover a 3' circle before I can get it cleaned up.

He said they loosened them. I suspect they fell out on the road. Must have been pretty loose.