diesel tech,560 injectors.

i have these early style injectors with the big nut. i wanted to know if the screen was optional as one has a screen and the other one
dont. they are not off the same tractor. and also the bottom nozzle ,does that come apart or is it a one piece deal. that is the part # on
the nozzle.

Some had the screen, some didnt. Valve is American Bosch ADE 10 S 7C if I recall, and no longer available

ok thanks. these early ones had pressures of 1500 psi , while the later ones used pressures of around 1000 psi. wanted to look inside that nozzle but i would need special tools to get it apart.

The original D236 and D282 used that nozzle tip. We started to see screen failures with pieces getting into the tip so IH said, throw screen away and use just regular washer. It required a special little vise to hold the top end while you popped the bottom off to get it apart. Pressures were in the 1300 to 1500 psi range as long as they were within 50 psi of each other.

Then they came with the so called IH Midget nozzle tip with about 1000 psi. It cost about 1/3 as much to replace the tip and did a better job for starting .

thanks pete! i might try to destroy one just to see whats in there, i mean for wear. on the tip.

could add a little more about the nozzle tips. That Bosch tip has a spacer under the spring. They come in many different thickness of the shoulder and that is how you adjust the pressure.


The IH midget nozzle tip had different thickness of the pintle retainer. That is how you changed the opening of the pintle. If I remember correctly it was to open .007. You assembled tip and put it in a special vise and with a dial indicator checked the movement for total opening.

I had a board full of nails with all the different spacers for both style nozzles. It was a time consuming job .

Also, when testing the IH midget nozzle you had to rap it pretty hard to check the spray pattern and then easy does it to check opening pressure and leakage. A lot were condemned due to wrong procedure. They could actually test pretty bad and you would never know the difference in the engine. Lot of repairs done to injection nozzles when it was other problem, like timing advance of pump. Learned that the hard way also.

One other thing. They are not injectors. They are nozzles or injection nozzles. An injector is like Cummins used on their PT system where the real injector was run off the cam shaft and actually metered the fuel, and injected the fuel into engine. Just one of my pet peeves that of course I have to overlook.

I did get the nozzle apart. I see that spacer that fits into the spring at the bottom. Quite a simple set up. What is the outcome of using both types in the same engine , or nothing? Thanks for the info.