Priming a 239 ih diesel

Dale c mi · Dec 3, 2016

Took a 5 gallon can full of fuel and placed it on the rear fender of the 3500 ih. Small syphon hose, sucked. Once fuel ran out hose , placed hose on steel line at front of the injector pump. ( fuel inlet) tightened clamp. Loosened the banjo bolt and blead off the last of the air. Pushed the fuel shutoff all the way forward. Broke loose the injector lines. Have been cranking and cranking and get very small amount fuel at the injector. Will not start. What am I missing. We had diesel on the farm and they all had a manual pump to prime them.

Dieseltech · Dec 3, 2016

Try bringing the stop lever back against the spring loaded plunger, but don't compress the plunger spring. This is the excess fuel start position, compressing the plunger spring is stop, all the way forward is run. Good pumps will start with the lever forward, but most need the lever pulled back to the plunger for best starting. I hope you are filtering the fuel, you are risking pump damage if no filter in place. While the Bosch VA is a good pump, parts are hard to find if damage is done.

Al Baker(pumpman) · Dec 3, 2016

Good advise from Dieseltech. The Va parts are not hard to find, sometimes they are impossible. I do quite a few reseals, or freeing up frozen VA/VACR pumps. Dont mess around with this pump if it is not right. You can do some damage really easy that may take months to find replacement parts for and some hard to earn cash. Unhook the throttle linkage as well as the shut off. You should be able to move the lever with NO resistance except for the pressure from the spring return. If it is sticky it is VERY easy to break off the pin that turns the Little spool valve behind that plate. Because the VA/VACR dont have a governor, all fuel settings and speed control are regulated by hydraulic pressure to these two spools. This means they have to move very freely. I have seen big dollar damage done by a cowboy jerking on one of those linkages when they move hard. Al

Dale c mi · Dec 3, 2016

There don't seem to be enough fuel coming out the lines at the injector. No more than a drip every rev Will not build pressure.dont ack like it is pumping fuel thru the pump

Dieseltech · Dec 3, 2016

When did the engine last run? You may already have pump trouble. Just resealed a VA CR pump from an IH 715 310, to put on the neighbor's late IH 706 after the early AR pump died. Al is spot on, I've seen too many times dad let junior take pumps apart, and end up with critical parts broken or missing completely. Then wonder why the repair costs so much..

RBoots · Dec 4, 2016

Hey Dale, there is a couple of D239 engines at Worthington Ag, I know the one ran, so they probably wouldn't sell the pump off it, and not sure about the other one, but you never know, they may. Just a heads up in case you need parts.

Ross

Priming a 239 ih diesel

Dale c mi

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Dieseltech

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Al Baker(pumpman)

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Dale c mi

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Dieseltech

Well-known Member

RBoots

Well-known Member

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