Mahindra 3510HST Spontaneous Engine Stop/Cut Out

[mazog755]

My 3510 HST has been a GREAT piece of equipment. Recently I have experienced an anomaly where the engine will immediately stop while running/operating. Almost every time it dies while running, I can immediately start it back up. Similarly, I have experienced a problem where the tractor won't start due to the entire ignition system being "dead". Usually when this happens I can get it start by stomping the emergency brake or bouncing on the seat, or simply by trying it a bunch of times in a row.

I suspect that during the "immediate engine kill situation" one of the safety interlocks is shorting/dropping out, either related to the seat, or the emergency brake pedal. I guess it is also possible that whatever kills the engine during an "operator off of the seat" situation might be failing. I'm also guessing that in certain situations when the tractor is turned off, the "engine kill" is getting stuck in "killed" mode until I "shake" it loose.

If anyone has ideas about where to start looking, I'd appreciate the advice. Thanks for any help!

Jim M.

 

[Redneck in training]

I have TYM 330 2005 that is similar (Mahindra 3510 is made by TYM) tractor to yours. Seat, PTO OFF and brake interlocks are needed to start the tractor. After the tractor is running it is only seat switch that will stop the engine unless parking brake is set. The engine doesn't stop instantly but there is a timer of several seconds so short lived seat switch activation (in example while driving on bumpy terrain) will not stop the engine.
There should be a red light flashing when any engine interlocks are not made. In example when you want to start the tractor and brake is not depressed or PTO switch is ON or seat switch is not made. The tractor has a controller in the dash that does all the functions. It failed on my tractor with similar symptoms you describe. First the red interlock light stayed on all the time but tractor was running. Then the engine was shutting of unexpectedly. It would sometime start and sometime I had jump the starter. Cost $200.
Assuming that the controller is good. Check the time relay in addition to switches. The dealer told me that latest tractors don't have seat switch anymore.
Attached file is for TYM but might work for your tractor too.

 

[mazog755]

Thanks for the information. FYI that I wasn't able to open the ZIP file - can you confirm that the archive is valid?

 

[Redneck in training]

The file is OK. If you can't open it let me know and I will attach the files unzipped tonight.

 

[mazog755]

I'm still getting an error when trying to open the file. If you can attach unzipped files, I would appreciate it!

Jim M.

 

[Redneck in training]

I'm still getting an error when trying to open the file. If you can attach unzipped files, I would appreciate it!

Jim M.

 

[JerryK]

What a nice job ' RIT ' .... !!!!!

 

[mazog755]

Agreed. Thanks!