Gentlemen, I thank you for all your input on 5075e verses 5075m. Now I m more convinced to go with M. I spoke with a JD mechanic shop foreman the other day whom has helped me for the past 17 years with mechanical problems with my 970 JD, he is telling me that the new emissions tier4 is troublesome . Too many sensors that can shut tractor down to 1000 rpm. Can be something minor or something major. Laptop has to be hooked up to figure out problem. That spells down time whether I take it to the shop or get tech out to job site. Any input ?
Yes, your statement has merit.
The limited performance that you mentioned is commonly called "Limp Mode". The computer senses what it diagnoses as a hazardous, destructive situation. Rather than let the engine perform normally until this problem magnifies, it limits performance. Most times this is an rpm limit. Some times it is an rpm limit plus a gear selection limit, if computerized transmission is present. Might only function in 1st gear for example.
Not knowing your age, I'll use myself as reference (65).
My early cars had carbs and a point system ignition. Only three tools and a pack of gopher matches was required for a quick tune up. Straight screwdriver, Phillips screwdriver, pair of pliers, gopher match cover to use as feeler gauge. Before a Saturday night street/drag race I have many times tweaked the point setting and timing slightly to get a hotter run. Wouldn't start for crap because was timed too fast. But sure ran good for the few minutes I needed it to.
Today's cars can be tweaked in a similar fashion. Doesn't require any tools. Just a Laptop computer with the appropriate program installed.
Old cars could almost always be made to run with a few minutes under the hood.
New cars can almost never be made to run with a few minutes under the hood.
Which is/was better?
Computerized operation has moved into the tractor market in thanks to EPA. Requires technical input to make diagnosis/repair. Requirement for such intervention is rare. Very rare. For every tractor owner here on TBN that has a horror story concerning this technology there are 100 owners here that will testify to never having the need to have their tractors worked on. I hauled my new tractor home 4 1/2 years ago. 1200hrs later it's never had a dealer repair of any kind required. No malfunctions, no computer glitch, no failed parts.
I've said this before and I'll stick with it now. Use tractors long enough and you will own an emissions tractor. No escape from that fact. I dread the use of DEF more than the possible problems with it.
