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Southern Alberta Canada | Anybody got a Cummins ECM P/N 3654717 for a John Deere 8970 sitting on a shelf anywhere? Ours failed and the local Cummins dealers want 3 grand for it. Been surfing the net and so far I'm down to $1800 plus shipping and programming. Midwest won't touch it, it's not a popular ECM, I think it was more popular for marine and generator engines.
Anybody have any ideas or leads I'd like to hear it. Thanks. |
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Brazilton KS | I've got one for a 9370 quad still hanging on the side of my tractor not doing anything.
If you replace the ECM now for $1800 (used, I presume?) the next thing you know you will be replacing the fuel control valve to the tune of about $2000. The Centry system they used is not noted for working particularly great or being overly reliable.
You can put a variable speed governor PT pump on it for about $1600 and you will be done with all kids of electronic problems for good. That's what we did to the 9370.
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Southern Alberta Canada | Actually I was thinking the same thing but both Cummins and an injection repair shop said I'd have too many issues... I don't know why, it's a PT fuel system with electronic controls. The tractor has a manual transmission with the two speed powershift, I don't know how the ECU on the tractor would respond though with no fuel pump plugged into it.
Ironic, I just finished putting an N14 into one of our old hyway trucks (replaced a 444XT) runs great, seems I'm going backwards here.
Yours is Cummins powered also then? I don't know the 9370.
PS I've already replaced the fuel control valve $800 new out of Lousiana $1800 is new from Cummins (10 days, overnight add 17%) |
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south texas | We have changed over 1/2 dozen or so 8970's. Might have old ecu, will look out back. I'm with plowboy, get pump redone with the "ag govenor, install cable and your problems are over with.. End of discussion. Email me if need ecu. I cannot guarantee it is good. Did you closely look at the fuses on engine harness and check for broken pin connectors on ecu harness. |
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Southern Alberta Canada | Where did you find the VS pump and how did you match it up with your engine?
Is your ECM good? Want to sell it? |
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Southern Alberta Canada | Harness, plugs and fuses appear fine, had ECM checked at Cummins.
How much you want for them 3015 Deere? |
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Southern Alberta Canada | How does one do PMs on this site? |
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So. IL | Click on posters name(in blue) and their contact info will pop up, and you can e-mail them. |
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south texas | [email protected] |
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Brazilton KS | Pump man built it for me. He bought a core and built from there. He built it to a 9370 wheel tractor CPL. The quad actually has abuot 10% bigger injectors, which I may have sort of not completely disclosed... so we're a bit stronger then we're supposed to be...not gonna complain about that. If you take the CPL of your engine to someone with good access to Cummins service data, you can find out what flow rate the injectors are, and what fuel pressure it is supposed to run, and build from there. Of course, more fuel flow is always better :) You can also put a hydraulic governor on it which basically replaces the electronic fuel control valve which you have now and still uses the basic truck pump. Again, that too is about $1600...and I was advised that the true ag governor pump is by far the best choice of the three when it comes to performance and life. I have no idea if my ECM is good or bad. I think I may need it to keep the dash working correctly, so probably better just leave well enough alone. There is nothing that I am aware of on you tractor which has any communication with the ECM, unless something tells the engine to derate in lower gears. I don't think the ECM on a Centry engine like we are discussing is really capable of doing anything with any other machine parts anyway, and for that matter I don't think a 70 series has any other machine control modules for it to communicate with. |
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ND | Offroadnt - 9/2/2011 11:59 Actually I was thinking the same thing but both Cummins and an injection repair shop said I'd have too many issues... I don't know why, it's a PT fuel system with electronic controls. The tractor has a manual transmission with the two speed powershift, I don't know how the ECU on the tractor would respond though with no fuel pump plugged into it. Ironic, I just finished putting an N14 into one of our old hyway trucks (replaced a 444XT) runs great, seems I'm going backwards here. Yours is Cummins powered also then? I don't know the 9370. PS I've already replaced the fuel control valve $800 new out of Lousiana $1800 is new from Cummins (10 days, overnight add 17%)
There is no ECU on a 8970, why did you replace the efc valve ? |
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NW IL | What do you call it? |
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Southern Alberta Canada | "Apparently" 90% of failures with these systems is the EFC valve. I'm still learning... |
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Southern Alberta Canada | I don't actually know exactly how the PT fuel system works but I'm thinking it just adjusts fuel pressure, the injectors do the rest. I suppose the higher the fuel pressure the more fuel your going to get but it does sound like a very simple system. |
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Southern Alberta Canada | ekeller2 - 9/2/2011 11:44
Click on posters name(in blue) and their contact info will pop up, and you can e-mail them.
Oh OK thanks. Another question, how does one keep track of his thread, I'm going to loose it in here. |
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Brazilton KS | PT pretty well sums it up. The size of the injector, the time the cam keeps it open, and the pressure in the fuel rail are all there really is to it. |
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Brazilton KS | Okay, johnypop, obviously you want to play semantics here, so what do you wish for us to call the component which contains the electronic logic which controls the EFC on a Centry fuel system if you don't approve of the term ECM? |
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Brazilton KS | you can just bookmark it, and you will have it saved in your computer. Otherwise I would bet if you put ECM 9370 8970 Cummins in the search box, you will find it. Or put the same terms plus newagtalk in google. |
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Southern Alberta Canada | OK guys, I'm referring to "RE68789 TRANSMISSION CONTROLLER" (they call it a PCU) but I haven't looked to see if I have it on my tractor yet being all it would control is the two speed which is lever operated electric shift. I don't think there is even a gear indicator in the dash display. There is a knob that limits engine speed but I think that's just tied into the engine ECM. I would have to check the outputs on the engine for the gauges also, I'm sure the tach has it's own sensor, have to look and see if the oil press and coolant temp gauges are the same. Maybe the ECM only sends signals for the check engine lights. A Cummins guy told me John Deere was forced to use this engine through a court case between them and Cummins as a settlement for Deere copying the 903 when they developed their 955 V8 diesel engine so hopefully they told their engineers not to integrate the engine and tractor too much. |
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Southern Alberta Canada | If that's the case why does the fuel pump need to be matched to the injectors? More pressure=more fuel=more speed/power, it's the size/fuel delivery of the injector that determines engine output...or am I missing something here? |
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Southern Alberta Canada | I really appreciate everybody's input here, I'm taking a couple days to take my oldest to university in Kamloops BC but I'll check in and be back at it Monday.
Thanks |
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NW IL | I think I have what your looking for, it's off an 8970.
 (8970 ECM 001.jpg)
 (8970 ECM 001.jpg)
 (8970 ECM 002.jpg)
Attachments
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 8970 ECM 001.jpg (92KB - 924 downloads)
8970 ECM 001.jpg (92KB - 962 downloads)
8970 ECM 002.jpg (52KB - 877 downloads)
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Southern Alberta Canada | Was it still working do you know? |
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NW IL | It came off our tractor. After the tractor was warmed up from running all day, if you went to idle and walked away as it sat it would rev back up. The only way to slow it down was to put it in gear and let the clutch out, then it would idle down and be fine. The local mechanic could not tell what was doing it so we told him to replace the 3 main possiblities. He replaced the ecm, wiring harness, and governor. Tractor runs great now. I don't know for sure what our issue was but I fell like it was the governor. my e-mail is in profile. I'll give you my phone number through e-mail if you want to talk. |
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Southern Alberta Canada | Well we got 9670guy's ECU and I finally got it installed and it seems to run fine. Thanks for your input everybody, your advice and opinions and ideas gave me lots of options to consider, hopefully it'll run good for at least a few more years, if not I have a wealth of information to work with :-). |
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Where can I find a John Deere/Cummins ECM
