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.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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