AC 190xt has started to run rough and die

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   Guys my tractor went from running and idling great to starting
rough and dying after 3-5 minutes. This tractor had setup for years and I just
got it. I setup an auxiliary diesel fuel tank and pumped and primed everything
from the tank to the injectors. I am sure it’s getting fuel to the pump (broke the line loose).  When it dies its acting as if its
starving for fuel. You guys have any ideas in terms of what the problem could
be as it was running good at first?  It’s
a 190XT and uses the Roosa Master DBGFC 631-31AF pump. Thanks for all your
help! Love this old tractor and will see it come back to life somehow!

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whizone Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 23 Mar 2018 Location: Texas Points: 102	Post Options Post Reply Quote whizone Report Post Thanks(0) Quote Reply Topic: AC 190xt has started to run rough and die Posted: 30 Apr 2018 at 10:15am
	Guys my tractor went from running and idling great to starting rough and dying after 3-5 minutes. This tractor had setup for years and I just got it. I setup an auxiliary diesel fuel tank and pumped and primed everything from the tank to the injectors. I am sure it’s getting fuel to the pump (broke the line loose). When it dies its acting as if its starving for fuel. You guys have any ideas in terms of what the problem could be as it was running good at first? It’s a 190XT and uses the Roosa Master DBGFC 631-31AF pump. Thanks for all your help! Love this old tractor and will see it come back to life somehow!

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bradley6874 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 05 Sep 2010 Location: salisbury md Points: 1349	Post Options Post Reply Quote bradley6874 Report Post Thanks(1) Quote Reply Posted: 30 Apr 2018 at 11:01am
	Next time it dies on the side pump is the timing window held on by 2 screws loosen them up let the pressure out and start it back up if it starts right up it's time to overhaul the pump get up with an expert ( injpumpEd ) on here you won't be sorry may want to let him do the injectors as well then the fuel system is good for next 30 years Edited by bradley6874 - 30 Apr 2018 at 11:21am
	You can wash the dirt off the body but you can’t wash the farmer out of the heart and soul

Calvin Schmidt Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 11 Sep 2009 Location: Ontario Can. Points: 4530	Post Options Post Reply Quote Calvin Schmidt Report Post Thanks(0) Quote Reply Posted: 01 May 2018 at 5:45am
	Good advice above. Been there and done that. Governor ring has deteriorated and is blocking the return line and building pressure inside the pump. Relieve the pressure and it will start right back up.
	Nothing is impossible if it is properly financed

injpumpEd Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 13 Sep 2009 Location: Walnut IL Points: 5080	Post Options Post Reply Quote injpumpEd Report Post Thanks(0) Quote Reply Posted: 01 May 2018 at 7:53am
	Yep, these pumps don't like being brought out of retirement without freshening them up. Sits for years, then suddenly asked to work again, the flex ring almost instantly begins breaking apart. The other thing is this tractor may have been parked all those years ago simply because the pump was in need of servicing and they just didn't think it was worth it. So many places charge 1000-1500 to rebuild these old DB Roosa pumps, and in my shop they are typically half that. Now, there is an occasional cam ring, head & rotor, or housing needing replaced, but I keep lots of good used parts for that reason. To keep my customers' costs down. I am in business to make money and survive, but I've never expected to get rich doing this lol!
	210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

whizone Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 23 Mar 2018 Location: Texas Points: 102	Post Options Post Reply Quote whizone Report Post Thanks(0) Quote Reply Posted: 06 May 2018 at 4:31pm
	Thanks to everyone for the help.. with this forum and all the great contributors the old tractor may once again run the fields.. :) Thanks again for all the insights, you fellows are awesome.. TX.

plshelpme Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 19 Jun 2019 Location: WI Points: 2	Post Options Post Reply Quote plshelpme Report Post Thanks(0) Quote Reply Posted: 19 Jun 2019 at 10:09am
	Hey Ed will you rebuild my 190xt pump?

injpumpEd Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 13 Sep 2009 Location: Walnut IL Points: 5080	Post Options Post Reply Quote injpumpEd Report Post Thanks(0) Quote Reply Posted: 19 Jun 2019 at 12:46pm
	I can if you aren't in a big hurry lol!
	210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

plshelpme Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 19 Jun 2019 Location: WI Points: 2	Post Options Post Reply Quote plshelpme Report Post Thanks(0) Quote Reply Posted: 19 Jun 2019 at 3:14pm
	Well i'm not in a real big hurry but I need to know how long it would take...Thanks... Greg

AndrewMandel Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 02 Oct 2021 Location: California Points: 2	Post Options Post Reply Quote AndrewMandel Report Post Thanks(0) Quote Reply Posted: 09 Oct 2021 at 5:52pm
	After one week of analyzing the problem with my newly purchased 1975 AC 185 for $100 basically given free from a generous couple. The Mechanic they hired wasn't able to fix the issue of start and die problem and pointed out that it is a transmission problem.I know from experience that it is starving of fuel and the injection pump mechanically performs well, but where is the leak and what causes it? After following all the recommendations from the forum and methodically going to the process of elimination physically. Dr. Allis (credit)has the answer that is clog return line caused by the rubber compression fitting line intake that started to disintegrate(line from the fuel filter to the injection pump). Cost $.079cents. Maybe some problems are unique such as the flex ring that started to fall apart. I cleaned the crystal ball with compressed air and soaked in gasoline 1/2 fitting wrench no need to grind for me to get the ball out. It save me lots of money by being patient. Will see how long it stays running. This tractor runs like champion!Thanks for all the input.