DieselTalk

DieselEngineTrader's FREE Diesel Engine Forums

new topic search Categories login View John Deere Engines

CATEGORY LISTINGS > JOHN DEERE > John Deere 3125 AFM [ REFRESH ]
Thread Title:

John Deere 3125 AFM


Created On Sunday June 14, 2009 09:56 Diesel Talk
Diesel Talk Forum

Dungyman
Diesel Talk Forum
Posts: 3
Joined: Jun 2009

Note Sunday June 14, 2009 09:56 View thread in raw text format
Diesel Talk
This is an engine on a commercial fishing boat in Alaska.It has a little over 8000 hours on it.It was new in 2003.Yesterday we got in after a fishing trip and had just tied up at the cannery when an alarm from the engine guages panel went off.It was an amber lite with the alarm and after reading the engine manual we finally figured out how to get the service codes from the lcd guage. It said SPN 1569, FMI 31 this is "fuel derate" according to manual. The other code was SPN 94, FMI 18 this is " fuel supply pressure moderately low" according to manual.I use a 10 micron Racor filter as a primary filter and then whatever the John Deere filter on the engine is as far as microns.Those two filters were changed less than 500 hours ago and this last trip the fuel pressure seemed to be in the good range ( 67-71 ps) even on the way home which was only 15 hour run.Not once did the engine sound different.I will change filters and see what happens but my concern is that something else might be going on.This is the first alarm or problem on this engine ever.Im about to fish salmon for 2 months so hopefully this is a filter issue.Also does anyone have any advice about this engine as far as what the future holds in problems and what spare parts we should have on board?Thanx everyone!
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

JoeZ
Diesel Talk Forum
Posts: 938
Joined: Dec 2008

Note Monday June 15, 2009 15:59 View thread in raw text format
Diesel Talk
Sorry to say, but the fuel available these days is not what it was. We see people changing the fuel filters about twice as often as before and also we have had much more pump failure in the last few years. The JD engine seems to handle it much better than Cummins, so you have that going for you. I would change the filters and give it a full bore test run before you head out on a long trip.

-------------------------
 One of the last 2 Stroke mechanics left.
44 years in the business and worked on everything from 53 series to 149 series. Winding it down now...time to move on.
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

Dungyman
Diesel Talk Forum
Posts: 3
Joined: Jun 2009

Note Tuesday June 16, 2009 20:48 View thread in raw text format
Diesel Talk
Thanx for reply.I changed filters and no alarm so far.Its funny,,,never had this problem before and never have gotten bad fuel from our only fuel dock.I change fuel filters religiously especially before going out into the ocean and thats why Im kinda waiting for the other shoe to drop.I hope it was that simple.
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

Dungyman
Diesel Talk Forum
Posts: 3
Joined: Jun 2009

Note Sunday June 28, 2009 19:43 View thread in raw text format
Diesel Talk
Well it wasn't that simple.I changed out the fuel pressure sensor and that didn't work.The alarm is going off again.I made my first salmon trip of the season and found out running the engine at 1400 rpm's I have lost about 9 psi +/- on fuel pressure.This is on freshly changed primary and secondary filters.Usually at 1400 rpm the pressure is 68-71 psi now it is 61.Thinking is now its the pump so another one is on the way.Will let you know.
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

DieselNRGY
Diesel Talk Forum
Posts: 3
Joined: May 2010

Note Tuesday May 11, 2010 09:11 View thread in raw text format
Diesel Talk
6125 had issues with the pressure regulating valve in the filter housing. It's located right under the pressure sender in the back. It's cheap and easier to buy a whole housing with the senders, filter, and relief valves already in it.

However, I agree the fuel is the first thing to blame. It doesn't have to be text book bad to cause problems these days.
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
Diesel Talk Forum

johndeere1engine
Diesel Talk Forum
Posts: 1
Joined: May 2013

Note Wednesday May 15, 2013 11:57 View thread in raw text format
Diesel Talk
I agree with the statement that the JD engine handles more than other engines like Cummins. It has been the best brand in my opinion. See some great diesel engine parts here
Diesel Talk Forum
Reply Diesel Talk Forum Quote Diesel Talk Top Diesel Talk Forum Bottom Diesel Talk
Diesel Talk Forum
CATEGORY LISTINGS > JOHN DEERE [ REFRESH ]
SELECT Advert_Number, Size_Type, Banner_Name, FName, LName, CompanyName FROM Advert_Imp a LEFT OUTER JOIN Seller s ON a.Company_ID = s.SellerID WHERE Show_Advert=1 AND Size_Type = 2 ORDER BY Advert_Number
#AltName#
#AltName#
SELECT Imps_Available FROM Advert_Imp WHERE Advert_Number = UPDATE Advert_Imp SET Imps_Available = #Imps_Available1# WHERE Advert_Number = SELECT Impressions FROM Advert_Imp_Trans WHERE Advert_Number = AND Month(Date)=#CurrentMonth# AND Year(Date)=#CurrentYear# UPDATE Advert_Imp_Trans SET Impressions = #Impressions1# WHERE Advert_Number = AND Month(Date)=#CurrentMonth# AND Year(Date)=#CurrentYear# INSERT INTO Advert_Imp_Trans (Advert_Number, Date, Impressions, Clicks) VALUES (#Advert_Number#, #CurrentNow#, 1, 0)
SELECT Advert_Number, Banner_Name, FName, LName, CompanyName FROM Advert_Imp a LEFT OUTER JOIN Seller s ON a.Company_ID = s.SellerID WHERE Show_Advert=1 AND Size_Type=1 ORDER BY NEWID()
#AltName#
SELECT Imps_Available FROM Advert_Imp WHERE Advert_Number = UPDATE Advert_Imp SET Imps_Available = #Imps_Available1# WHERE Advert_Number = SELECT Impressions FROM Advert_Imp_Trans WHERE Advert_Number = AND Month(Date)=#CurrentMonth# AND Year(Date)=#CurrentYear# UPDATE Advert_Imp_Trans SET Impressions = #Impressions1# WHERE Advert_Number = AND Month(Date)=#CurrentMonth# AND Year(Date)=#CurrentYear# INSERT INTO Advert_Imp_Trans (Advert_Number, Date, Impressions, Clicks) VALUES (#Advert_Number#, #CurrentNow#, 1, 0)
Advertize on Diesel Engine Trader

Customer Testimonials

Newsletter

Subscribe to our mailing list to get all the latest DET news.as well as daily or weekly notifications of new engines, gensets and spare parts listings.

'Listed a Perkins T6.354 on DieselEngineTrader and sold it after 5 month. With a listing fee of $5.00 per month and no commission, it was much cheaper and more effective than the magazine we also used.'

Chris Weeks, Old Forge Lake Cruises, New York, USA

'We sold 2 engines to overseas customers within the first month of listing. As soon as we list an engine, we get calls. There are lots of customers watching for engines and parts. DieselEngineTrader.com works well for us.'

Dennis Lanteigne, Marine Diesel Engines Ltd., Caraquet, Canada

'The DieselEngineTrader.com website is great and we'll continue to use it in the future.'

Robyn Hazen, Government Liquidation, Scottsdale, AZ, USA

Copyright Diesel Engine Trader 2015