Steve.
I've been around tractors that use the DPA pump for way too many years
now.
This what I have observed. If the engine will idle there is little wrong
with the pump. If the engine will rev to mid range falter but pick up
again when the speed is reduced you probably do not have air getting
into the system.
What your symptoms point to is fuel starvation.
No one has mentioned fuel gelling. What is the temperature at your
location and how old is the fuel in the tank. If it is cold and there is
a possibility you have summer grade diesel there's an excellent chance
you have having gelling. The solution is to dump in winter fuel
conditioner.
If this isn't likely to be the case then look for any possible cause for
fuel starvation.
If the filter is as I suspect a CAV unit it can have a water trap added
to replace the bottom bowl and attachment bolt. This a available as a
part for a Massey Ferguson 165 tractor among others.
For the filter itself cross reference to CAV.296
John
Steve Lister wrote:
>
> Okay Friends,
> After reading the suggestion that my problem may be a distributor pump I
> fell ill. How would I be able to tell if that is the problem? Can
> distributor pumps fail in an erratic fashion? (That is probably a
> stupid question).
> I am proceeding today to hunt down a suitable diesel filter and will
> attempt to dump and clean the tank and add the biocide to send any
> critters in it running in obvious hopes that it fixes my ailments. Any
> comments or suggestions appreciated.
> Once again, the symptoms are that the vehicle worked great shortly after
> changing the filter. Then after about 20 minutes of driving (just long
> enough to get me far enough away from home so that the test
> drive/excursion became an adventure) it began to act up again. It idles
> fine and actually works up to about mid range revs. Then it begins to
> falter and die. When I release the accelerator it resumes idle. I'll
> check back in a couple of hours.
> What I need to here is that distributor pumps never act in a erratic
> fashion and that my problems are more closely associated with the way I
> have been living lately. Thanks.
>
> Regards,
> Steve Lister
> AirNet Express
> 2262 Extension
> 614 238-1905 Office
> 888 720-9636 Beeper
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