4030 idling problems

[travz500]

has the rossa master jdb pump i think forgot to get the number before i came in but if you idle it down from about 2000 down to 1000 it will idle back up to 2000 then go up and down by itself sounds like the injector pump to me probably the governor malfunctioning am i right pump needs rebuilt correct

 

[JDTECH]

The governor ring is coming apart in the injection pump. Remove the small rectangle cover on the side of the injection pump and see if there is some small rubber particles collected there. Tell tale sign. Good luck.

 

[Tx Jim]

Inj pump needs repair or engine may need a block.

 

[JDemaris]

The Roosamaster/Stanadyne pump ought to be a DBGVC631-4AF, 11AF, or 1AJ.

That problem is either air in the pump from a problem other then the pump, or a partially plugged housing-regulator-valve, caused by a failed plastic dampener inside the pump.

Try removing the regulator and see if it starts running better. It's the fitting screwed into the top/side cover of the pump where the return fuel line hooks to. Remove the fitting and ream it out, even if you have to ruin the little spring and ball inside. If it then runs great, you know the problem. But, don't run it too long that way since the pump will eventually self-destruct until you fix it.

Keep in mind you can upgrade failed plastic and eliminate if forever. Most pump shops do NOT upgrade unless you ask. It is always done when those pumps are on cars and pickup truck - but NOT on tractors unless you ask.

 

[Anonymous-0]

jim explain how you make the leap from bad inj pump to the block i dont think you have a clue

 

[Tx Jim]

(quoted from post at 15:06:00 04/12/10) jim explain how you make the leap from bad inj pump to the block i dont think you have a clue

Have you ever heard of an engine throwing a rod from over revving when inj pump governor goes bad? I have.

 

[tim s]

One thing can "Be-fuddle" the next....When things start going bad they can get "real" bad.....

 

[buickanddeere]

You have to know txjim. He sometimes uses dry subtle wit to make a point.

 

[Tx Jim]

(quoted from post at 21:06:05 04/13/10) You have to know txjim. He sometimes uses dry subtle wit to make a point.

IMHO A hole in engine block that a broken connecting rod created wouldn't be DRY WIT possibly oily wit.

 

[buickanddeere]

That would be a "slippery split".

 

[Anonymous-0]

Jim i have worked on deeres the last 50 years and there are a lot of them around here the only ones i ever saw throw a rod from over reving were power shift and guys would down shift with big loads behind over rev .a roosa pump will go out of stock if over reved to far

 

[jd4204204010]

IMHO A hole in engine block that a broken connecting rod created wouldn't be DRY WIT possibly oily wit.[/quote]

LOL and in the Deere manuals that is technically called a "Cross-Ventilated Crankcase." It's an owner-specified option available on all engines. :lol: