615 backhoe motor rebuild-injection pump

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   making good progress on the rebuild- short block assembled, head will complete this week, injectors, tips  bench dialed in-  now onto the injection pump.seems that somewhere it the past the original pump was replaced with a similar John deere version,  without going into too much model # detail- the spec DB pump had
 .37 dia.  injector pistons, and the JDB pump has .31 dia 
i am in process of reconditioning this pump and wonder if it would be good idea to set the roller to roller dimension  to max fuel delivery to make up the difference in the injector piston size? 
not having alot of experience with diesels-   is it safer to be fuel rich on the initial start-up?
any thoughts or life experiences are welcome and greatly appreciated

according to the manual the spec pump is DBGFC437-7-AG
                       the installed pump is         JBD431MD3027
                       research shows this pump was used on a naturally aspirated 219CI
                                                                                                               62HP 
                        the 615 backhoe had the D2200      200CI, 56HP naturally aspirated
                       so the motor specs are not too different.

Jeff

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
615_259 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 16 Jan 2020 Location: farmington Mi Points: 35	Post Options Post Reply Quote 615_259 Report Post Thanks(0) Quote Reply Topic: 615 backhoe motor rebuild-injection pump Posted: 18 Mar 2020 at 7:08pm
	making good progress on the rebuild- short block assembled, head will complete this week, injectors, tips bench dialed in- now onto the injection pump. seems that somewhere it the past the original pump was replaced with a similar John deere version, without going into too much model # detail- the spec DB pump had .37 dia. injector pistons, and the JDB pump has .31 dia i am in process of reconditioning this pump and wonder if it would be good idea to set the roller to roller dimension to max fuel delivery to make up the difference in the injector piston size? not having alot of experience with diesels- is it safer to be fuel rich on the initial start-up? any thoughts or life experiences are welcome and greatly appreciated according to the manual the spec pump is DBGFC437-7-AG the installed pump is JBD431MD3027 research shows this pump was used on a naturally aspirated 219CI 62HP the 615 backhoe had the D2200 200CI, 56HP naturally aspirated so the motor specs are not too different. Jeff

Sponsored Links

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20792	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 19 Mar 2020 at 10:23am
	So, by those specs, the fuel delivery is enough to make 6 more HP than original. What is the rated RPM's difference ?? 2200 rated speed on the AC engine? and 2400 ?????? for the Deere ?

615_259 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 16 Jan 2020 Location: farmington Mi Points: 35	Post Options Post Reply Quote 615_259 Report Post Thanks(0) Quote Reply Posted: 21 Mar 2020 at 7:15pm
	Doc, I apologize for the delayed response, world is kinda crazy right now. I believe the rated rpm is 2500, posting a pic Got the motor back together today, just waiting on a couple of injection pump parts. Having trouble locating a throttle lever fork.any suggestions?

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20792	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 22 Mar 2020 at 10:00am
	The internal fork that compresses the governor spring ?? Should be a pretty common part as far as old RoosaMaster pumps go. I'm sure the one from your old pump would work. I've probably got one from a core pump in my garage.

615_259 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 16 Jan 2020 Location: farmington Mi Points: 35	Post Options Post Reply Quote 615_259 Report Post Thanks(0) Quote Reply Posted: 22 Mar 2020 at 2:39pm
	Doc, Yes , the throttle fork on the governor is the piece I'm looking for. As you can see, one of the forks is busted I only have the one pump. If you do have one l, let's talk Fabricated a starter mount to spin the motor on the stand As lot easier to set pump timing on the stand before we should ed horn this back in the tractor.

615_259 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 16 Jan 2020 Location: farmington Mi Points: 35	Post Options Post Reply Quote 615_259 Report Post Thanks(0) Quote Reply Posted: 22 Mar 2020 at 2:41pm