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Fuel pump Timing issues

F

Farmall Smoke

Member
I have a 560 D-282, At the last pull it seamed to just give up when loaded down heavy, about the same amount of Black/grey smoke. Re-checked timing today and it has advanced itself???? Other than the send the pump to a shop, can someone tell me what is going on??? Thanks
 
It is highly unlikely your pump advanced itself. If it is new enough it will have a internal advance. It can have stuck. It is the bolt with the wire on it 90 degrees from the main barrel of the pump.
 
The pump has the internal advance, not sure if I am smart enough to start trying to adjust/mess with it. Do you think the advanced timing is causing the engine to not pull down? Thanks
 
Something is strange, is there a lot of backlash in the drive, maybe the three bolts in the pump drive loose? 460, 560, and 660 models all had light load advance pumps while most tractors have speed advance. The light load advance had a four degree pump, eight degree crankshaft advance range. Full advance at low and high idle speed, full retard at full load and 1/2 advance at 1/2 load, best checked on the dyno.
 
I do not note any backlash in the drive and all bolts are tight. Pulled the front cover and checked bolts at gear mount as well as a close look at what I could see of the gears teeth everything looks to be ok to my untrained eyes!
Went for a drive today and looked at 3 other close to same 560's and Pumps. 1- did not have the advance feature (maybe a older model)? Both of the others did, but from what I am noticing my pump has almost twice as many threads showing on the advance as both of the others???
I already know dyno would be best, but tractor has no PTO! Thanks for any and all help.
 
OK, now I'm curious if you even have the right pump. IH Blue Ribbon spec book shows four pumps for the 560, early had the bolt on advance block and later the housing was changed to integral advance. Pump model DBGFC631-1AE was the first pump used. 22AE, 49AE, and 101AE were also used. What is the # on your tag?
 
Dieseltech... I'll start with a answer to you question, Pump's model is DBGFC631--26AJ The History as I know it is I purchased this tractor out of North Carolina in July. Pump was to have been thru a shop there ?? but no proof.
Here is todays scary results.. In a conversation a friend tells me he has a Pump that was built up Many years ago but has sat on a shelf come get it and give it a try. I switched pumps but could not even get this on to deliver fuel, So removed and put my pump back on... Timed front damper to 4 degree's, pumps timing marks lined up, everything thigh, fuel system primed, engine started and warmed out for axp. 15 minutes... opened throttle wide open for a moment then went to throttle back, throttle went back but pump did not shut down... After a OH sh.. moment I grabbed the fuel shut down and also the air shut down!
Pump is now removed and at a shop, and The timing was at like 8 degrees this time not the 4 that I had set it at so it again changed???? Shops first thought is wore out housing???? I will let you know, Thanks
 
First off, the pump is not for a 560, as AJ suffix means speed advance, not load advance like the 560 came with. The books I have don't show a 26AJ anywhere, could It be 28AJ? As for running away, is there a turbo on the engine? Leaking oil inlet seals will cause runaway too even if the fuel is killed, the shut down cable manually moves the metering valve to the off position. If pump has a standard metering valve in an oversize head bore it will be slow to shut down, I suspect it ran off by the oil like Detroit engines can. I doubt the housing is hurt, but the pump may need the 15101 sleeve inside the advance bore to keep the slide washers in place. Roosa had a service bulletin about it but not all pumps needed it. Sometimes the base timing would change if a washer slipped when the engine was shut down as the cam rocked back and forth a bit. The pump you put on and didn't work most likely needs torn down and parts freed up to work again. I've seen that a lot lately..
 
I am mostly sure on the 26AJ suffix have the note pad here on the desk but can't check until I get the pump back.. No turbo. Leaking seals??? please explain, what seals? If its something in the Pump then I'm thinking the rebuild shop that no has the Pump will take care of it. Thanks
 
Leaking turbo seals at the inlet, doesn't apply since there's no charger. If the pump checks out make sure the oil bath air cleaner is not over full of oil, I've seen that cause run away too. Had a JD 4010 do it when water got into the inlet and raised the oil level, did some valve train damage on that one..
 
Ok Thanks, I am just thinking it was all in the Pump... No oil bath air cleaner either, and I also ran it close to 15 min. at a high Idle warm up before the full throttle runaway ordeal. Thanks
 
Hello Dieseltech... Picked my pump back up today and I am Confirming it is suffix 26AJ the shop has even re-tag the pump with a new tag showing same.. They found that the Cam ring was pitted and the rollers were damaged.. replace parts, and after many back and forth phone calls turned the fuel flow rate back as it was set at over 100cc....
Guess water in the fuel and sitting is the cause??? Thanks
 
Yup, water in fuel will cause the damage you describe. I'll check my books again, I know the AJ means speed advance, AE is load advance which is what the tractor came with. 26AJ may be a 706 or 282 industrial application. 100cc is way too much fuel for that engine without a charger, bet you had lots of smoke..
 
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