Having a Deutz Issue

[ponytug]

Dear Carl,
I'm glad you got into the spaghetti; it's never good to have cut wires and electrical tape hanging around, if you want reliability. While we have different series engines, I've been over my engine manual, and I don't see a high temperature cut out. It would be nice to have one though.

I have the following concern though as a diagnosis; if it is so cold, it would seem that high temperature is unlikely. Could it be that the oil pressure warning light switch is miswired to be part of the run continuity circuit, so if the pressure drops, you lose engine run capability. That would explain also the extended cranking to get the oil pressure high enough to close the circuit and open the fuel solenoid.

I hope that this helps.

All the best,

Peter

P.S. I'm dealing with another manufacturer's engine- where they used white wiring for every single wire in the engine compartment. (!) Makes one appreciate the PT wiring.

 

[woodlandfarms]

Peter, I just don't know. I was thinking it was reading the temp from the head, and that at the sloped angle for whatever reason the oil is not contacting that part of the head so it is reading only the steel temp (250, maybe 300 degrees) and not the oil temp (cooling at 160)

The other thing I did was clean the contacts on the connector. Go figure, the fan blows a ton of crap right across the connectors. Truly some things on this machine leave me scratching my head.

I may order a whole new engine and engin to chasis wiring harness. Start over clean...

 

[ponytug]

Carl-

I doubt that the slope has an effect on temperature. The oil cooling is done by oil under pressure, so unless you are seriously short on oil, there should be enough in the sump to pump around, and provide cooling. If you aren't getting the oil to the top of the cylinder head, I suspect you have bigger fish to fry- like the state of your bearings.

If your engine interconnect is giving you grief, I would think that plugging it in/out a few times would solve the issue.

Have you tried wiggling your cables with the PT running to see if you can stall it out on the level? You do seem to have an odd problem here.

Have you double checked the fuel solenoid? There are folks here who have had problems with them in the past; it seems to be a not uncommon point of failure, and they often fail by sticking, although usually by catastrophic failure, rather than intermittent failure.

All the best,

Peter

Peter, I just don't know. I was thinking it was reading the temp from the head, and that at the sloped angle for whatever reason the oil is not contacting that part of the head so it is reading only the steel temp (250, maybe 300 degrees) and not the oil temp (cooling at 160)

The other thing I did was clean the contacts on the connector. Go figure, the fan blows a ton of crap right across the connectors. Truly some things on this machine leave me scratching my head.

I may order a whole new engine and engin to chasis wiring harness. Start over clean...

 

[woodlandfarms]

Thanks Peter for the info.

I have not tried to re-create this due to the fact that the only steep slopes are a good walk away and generally not accessible accept by dozer. Also, to pull the PT out you have to release the pressure on the tram pump and free wheeling at 30 degrees with 4K lb of tractor scares me pretty bad.

Yeah... their is something funky with the wiring. (anyone have time to take a picture of the engine side of the connector?) But is it the culprit? I do not know. I hear the fuel rail activating, When I stall I get black smoke so it must be getting fuel (not getting enough maybe?) Also the black smoke may be the excess fuel from stalling out in the 1st place.

All I know is if I let it sit, it restarts. That for me is a heat related issue. Also it only does this when face down on a steep slope. So I look at oil as it is the only thing that moves (should move) with gravity.

What I do not get is how does the oil pressure sensor stop a diesel from starting? Anyone know the science? I hear the fuel rail clicking on so what does the sensor stop?

Carl

 

[J_J]

Have you talked with these guys.

I can help you with your Deutz air cooled!!

 

[woodlandfarms]

Thanks JJ Will give that at try

I talked to Terry. Says it makes no sense but that I should replace both harnesses... $158... Maybe some other time...

 

[SwampmanLA]

Different machines but I had a wiring issue with my 422. PowerTrac had wired in an inline fuse from the battery to the ignition stitch. When my 422 would get hot the fuse would lose connection and the 422 would die. I found it by leaving the key switch on and taking a stick and gently moving wires around. When I heard the cooling fan kick in I knew it was a bad connection. I replaced the fuse holder with one of my own, along with soldered connections, and all has been well. PowerTrac is known for wiring issues.

 

[BobRip]

Different machines but I had a wiring issue with my 422. PowerTrac had wired in an inline fuse from the battery to the ignition stitch. When my 422 would get hot the fuse would lose connection and the 422 would die. I found it by leaving the key switch on and taking a stick and gently moving wires around. When I heard the cooling fan kick in I knew it was a bad connection. I replaced the fuse holder with one of my own, along with soldered connections, and all has been well. PowerTrac is known for wiring issues.

I had the same issue on my 422. The connections were loose inside the fuse holder. I replaced the fuse holder.