DPF / regen disabled my tractor. Massey Ferguson 1758

[plowhog]

My tractor engine was about 2500rpm, about 540rpm at the PTO. I had just begun using the attached 3 point wood chipper when the tractor RPM reduced to about 2,000. All on its own. ???

Opened the cab door to check and found an ear-splitting horn was blaring. Yellow DPF indicator was lit but also the RED warning lamp was lit, which signals to immediately shut the engine down. Never seen the Red lamp lit before.

So-- you are "never" supposed to shut down the engine while the Yellow lamp is lit, but instructed to shut down immediately if Red is lit. Got it.

Manual says Red indicator can be DPF problem, overtemp cooling system, or low oil pressure. Temp and oil were fine, leaving DPF. The DPF soot bars were about 4 (out of 7,) which is easily in range. But, I restarted-- then tried to force a manual regen. It would not do that. Horn blaring away.

Left it overnight, and next morning it didn't want to start. Appears something like limp mode for 3 start attempts, very slow rpm only. On the 4th attempt it started OK. ???

The Operator Manual says if a manual regen does not work, then do the common rail maintenance procedure. Except I can't find that procedure anywhere in the manual, or in online searches.

Q- does anyone know what the common rail maintenance procedure is for a Massey 1758? And is that a "dealer only" service?

 

[Jstpssng]

It's a rather vague description, isn't it?

I can't help you but sometimes when a question goes unanswered, a little activity gets people to read it. If I post they see my name and say "What bogus advice is that idiot giving this time? I'd better check it out and set him straight."

At least I assume that's why people start offering help.

Good luck.

 

[TO_Bud]

Are you familiar with ChatGPT. Put your question in the search line and it will give you the procedure. I just did but the answer is too long to post here.

 

[plowhog]

I consulted with ChatGPT but it put me in the direction of checking all wiring to sensors ahead of and behind the DPF. I did that and all looked fine. The suspicion of ChatGPT is a failed sensor.

I tried manual regen, it won't do that. As I repeatedly cycled through the menus at one point the blaring horn ceased and I don't quite understand that as the amber and red warning lamps both stayed lit.

I did re-check soot levels and they are only at 4, so that is comfortably in range. I'm going to try replacing a couple of the sensors and if that does not work it will be off to the dealer ($$$).