Mechanical fuel injection pumps

Tony is awsome. One of the best there is!!

 

Now I've got an old-schooler's request as well...

My 81 Freightliner cabover never gave me a lick of trouble until this week. I don't use it much, but whenever I do it runs perfectly.

Yesterday I went to fire it up after it sat for a month. It fired normally but then quit. I fired it up again, it ran for a minute...quit. It's got the old Kysor shutdown system that I'm blaming this on. (Oh, it's a 3406A DI Cat.) Yes, pulled and changed fuel filters, primary canister screen cleaned and fresh spin on. Plenty of fuel in tanks. It's a shutdown issue, directly related to this Kysor system I'm really feeling.

I removed the shutdown solenoid that is located down next to the governor housing, but it's different than the B style, it doesn't mount flush into the housing, it's external with a line coming up into it from the bottom, and screws onto a 90* elbow off the side of the housing pictured here. But even when I hold the governor shaft in the open position with a vice grips now, it won't fire any more. I wonder.

Before I removed the shutdown solenoid, I put a 12V power wire off the battery manually to the terminal on the solenoid. I hear it click as it should, and I watched the governor shaft make it's normal 1/8 of a rotation or thereabouts, indicating the diaphragm inside the governor housing was working. After once or twice though...the shaft quit moving with the 12V power to the solenoid altogether. Then I manually turned it with vice grips, and still...no fuel/no start.

Here's the solenoid I have...gonna be interesting finding one of these I bet, if I in fact even need it at all. It could be something inside the governor now that I saw the shaft fail to rotate with power being put to the solenoid.

 

Sorry I messed the post up my reply is at the end of the above post

 

That's ok, I found it.
As i ponder this while blowing leaves off the lawn here, I took a hot dog break. Suddenly it dawned on me to look at the transfer pump. I'm gonna crack an injector line and see if there's juice up there or not while cranking. It's best to start looking at the $100 solutions than to go start at the $1,000 ones so that's the next best place to look. It had a blob of rusty water in the primary canister which is the only thing between the fuel tank and the transfer or "lift pump " as some refer to it as. Some funkies may have gotten to the pump which is a good place to look next.