IH 2500B Bosch VA4 pump and injector issue's, need help

First of all I'm new here and want to say hello. I read some of the post an I know there are guys here who are a lot more knowledgable than I am.

I've got a IH 2500B with a D239 engine and a Bosch VA4 inj pump.
The tractor actually runs decent but has some issue's I'm not really sure how to procede.

In the last few months it has started leaking raw diesel out of the exhaust on cylinders 1 and 4
At first I thought it was either injectors stuck open or lack of compression.
It has also started leaking diesel from the return line in several places
It has also developed a leak at the inj pump where the dist head bolts onto the rest of the pump. This leak will spray out when I first start it and then stop, but it will continue to drip even after the engine is shut down.
It hasn't pumped any diesel into the crankcase.
If anyone has any insight into what the problem might be, I would appreciate your input

thanks

Hi, simple thing first, leaking return line, this is a common problem, the part is still available from caseih. Make sure return line back to fuel tank is not blocked.
Raw Diesel leaking from exhaust port on cylinder 1 & 4, this is called Diesel slobbering, caused by few reasons, engine is not up to temp, engine idling too much and over fueling. If you look at the photo that I borrowed off the web, you see the label "Fuel control lever" and there is an adjustment screw that limits the the fuel control lever. This adjustment screw is called the power screw and the more that it is screw out allowing the fuel control lever to open more, the more HP the the engine produces up to a max of about 70 HP when the fuel control lever limits on the power screw mounting bracket.
What may have happened is some previous owner may have opened the power screw to the max over fueling the engine.
Another method to reduce slobbering if engine is just idling around is don't pull the STOP/START/RUN lever all the way to the top of the RUN position. This has the effect of not opening the fuel control level on the pump all the way and therefore injecting less Diesel into to the cylinder.
BTW most Diesel engines like to be worked hard and the slobbering will disappear.
As for the other leaks in the pump DieselTech is the expert.

Hope this helps
JimB

Thanks for the info
I've owned this tractor for over 20 years and have ran it hard without any problems and darn little ,maintenence.
The last 8 months I've had at my house and have used it a lot never really working it, maybe that is why it is slobbering now.

Hopefully dieseltech will see this thread and have some advice for me on the leak.

Sounds like the pump needs a complete reseal. There are some very critical head assembly parts to be careful with as most are no longer available. Had a leaker I could have repaired last month, but owner had been inside and broken the spill plunger control valve, he had to find another pump as parts were not anywhere. He just found another pump. Diesel slobber is normal for some cold running diesels at light or no load. DO NOT adjust the lower lever forward stop screw as it controls rated HP at full load only. Make sure water temp is up too with a good thermostat.

Thanks for the input, a complete reseal was what I was afraid of. I'm concerned this may be beyond my scope. I have a parts book that shows all the parts to the pump and there are plenty.
Can you suggest a good manual that I should get or a place I can send the pump to that can do a good job.

Send an E-mail, or call 5748934172. Can talk faster than type and answer any questions you may have.