injector pump

azgene

New User
Hi everyone,
I just joined this group and am hoping someone can help me. I have a White mighty-hoe 2-63-15 that I am having trouble with. It will start and run, sometimes for 15 minutes or so and sometimes a few seconds. Then it just quits, I can tell about 3 seconds before it quits as it becomes unresponsive . It starts up right away, but only runs for a few seconds.I believe it is the injector pump as it seems to be a fuel problem and I have changed the filters, replaced the rubber fuel lines, and even by-passed the tank and filters and it does the same thing. Does anyone know the procedure for removing the injector pump? I dint know what brand it is or the timing mechanism.I don't want to just pull it out, and mess something up. Thanks in advance for any help.
Gene
 
Post a picture of the injection pump. It sounds like Rossa-Master injection pump with the governor ring falling apart.

To check for this is simple. There should be a fitting in the top of the injection pump that is on the return side. Remove this fitting. It should have a check ball in it. This ball is clear glass so you maybe able to see through it but it still be blocked. If the ring is failing you should find small pieces of black rubber in this fitting.

Try this and post us what you find. I then can tell you how to remove the injection pump without getting it out of time.
 
Gene........"runs fer a few minutes and quits, will re-start".......sounds like a VACUUM in yer gastank. Try loosening yer tank cap and listen fer a WHOOSH. Thats cheaper than rebuilding yer fuel injector pump, eh? ........Dell
 
I have a pump like the one mentioned by JD
Sellers below on a Allis engine. I called Argo
Allis in Chicago (years ago) and they sent me
the instruction on how to remove and install
the pump.

I would say call the engine manufacture rep.
and ask for help. You described exactly what my
engine was doing. I was told some parts in the
pump will go bad over time or the use of old
diesel fuel will deteriorate some parts.
 
Roosa Master/Stanadyne weight retainer ring failure can be confirmed by loostening the two screw timing cover plate allowing fuel to leak out. If it runs then without stalling the pump has the flex ring failure that JD seller mentioned and needs repair. DON'T knock the ball out of the return fitting and think all is well or you will have much more damage than you have now. Not pretty when the retainer pins shear off, locking up the head and breaking the drive shaft...
 
I assume it has a Roosamaster/Stanadyne DB
rotary injection pump. Like the other poster
already stated - very common problem. Happens
to all of the D series pumps over time unless
made after 1985 or upgraded. A simple piece of
pellathane-plastic breaks into little parts and
plugs up the internal low-pressure fuel
circuit. The internal pressure gets so high -it
equals incoming fuel pressure and cancels it
out. Then acts like it has no fuel when
actually it has too much fuel. Shut off, let
sit for moment, and it will start right up
again.

Two hour fix with the pump on the bench with
$50 in new parts. Problem is -if you don't do
yourself locally - a pump shop is liable to
charge you $500-$800 for the same job.
a174635.jpg

a174636.jpg
 
(quoted from post at 04:00:45 11/20/14) Gene........"runs fer a few minutes and quits, will re-start".......sounds like a VACUUM in yer gastank. Try loosening yer tank cap and listen fer a WHOOSH. Thats cheaper than rebuilding yer fuel injector pump, eh? ........Dell

If it was gas engine I'd say you might be right. A diesel with transfer pump and injection pump will pull fuel down to about -7.5 psig and it will turn to foam. If you have a big enough transfer pump it will continue to run just fine, if the transfer pump only delivers just over what the engine is burning it will just fall on it's face and lack power. Might die under load but not idling. Something has gone wrong with downstream fuel system in this case.
 

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