Some of the mid 80's ones were clip on. The secondary filter will be on the back of the intake manifold if it has one on it and should. When you go to the parts store you will have to ask for it by name and it looks like a small oil filter. If you look strait down on the engine in the back you will see a round metal thing with two fuel lines going into it the filter hangs from the bottom of it. You most likely not be able to see the filter itself but can feel it. You can unscrew it from the top and it is a bit of a job to you get figure out how to do it then it gets easier. I am not really for sure if you can fill the clip on filter up when you put it on. Fill the secondary filter up and when you start it hold it up of idle for a little while.

I would put clean diesel in the fuel filter. The 2 stroke oil help to lubricate the injection pump. This engine was built when they had high sulfur diesel but now they don't so the lubricity of the fuel isn't as good and I would run some in each tank of diesel. It is not mandatory so if you fill it up and forget to put some in it don't loose any sleep it will be ok.

You are not being a bother to me if you were I wouldn't get on here. I just want to help get the truck running again so if you have any questions just ask and I will do my best to answer them. I hope this gets you going again and if not will work through it till it does.

Good luck.

 

Well I've made some progress, but not enough to run to the store with the truck. I've still got a couple of things I want to try, before I report in. Stupid work and responsibilities interfering with my truck tinkering...

 

Alright, I wanted to come back with a full report, but I don't have one. I think I have a fairly through half report though!

I did get the truck to run again (a couple of times now). The first time I didn't bleed the fuel filter properly. I had been cranking the crap out of it, and I didn't want to wear out my starter, so instead of cranking, and seeing the small geiser of diesel, I poured some into the air bleed valve, which is on the bracket, attached to the fuel filter (there is only one on the army trucks by the way).

Well, I don't know if it was due to that or not, but I was test driving her around the neighborhood, and she died on the first hill we came to. Met some of the neighbors (haven't been living here very long), and they helped me push her home. She wouldn't crank, and it was ~10pm, so I didn't want to sit in the middle of my 'hood, making all this racket. Thankfully, they were pretty quick and nice about it!

A buddy/coworker of mine had a theory that the pump might not be getting enough fuel at an incline, on a not-so-full tank (had 1/3 at the time), so he suggested I try putting more diesel in the tank, and actually bleed the air out the right way.

I compiled, putting about 9 gallons in, which barely made a dent on the gauge, and I tried bleeding the air the right way, by cranking. It only took my second short crank before fuel was squirting out quite vigorously, I was kinda surprised by how it shot out. Then I quickly tightened the valve back, and tried to fire her up.

Same result as before, it took 5-6 cranks, the next to last one of which was soooo close to catching the entire time, lightly spewing smoke, and it just took one more try. The first idle both times was a little high, but it smoothed out within a minute or so.

I'm trying to provide as much detail as possible, so maybe one of these minor things means something to you.

Well, the second time she was running, I decided to climb a small hill in my backyard, to see if she could do it, and she conquered no prob. Unfortunately, I didn't have much faith in her still, and I had found something I thought was messed up, so I shut her down there.

What I found looked like a cut fuel line, possibly going to/coming from my fuel filter, and I looked closer today, and it is indeed a line coming from my filter, going straight down, and ending in my wheel well, connected to nothing at the other end. What the hell is this??? I think I felt the faintest puffs of air coming from it. I'm guessing/hoping this is normal?

Because I was out looking at her today, I couldn't resist a test crank, and after I cycled the glow plugs twice (I was suspecting them too), she fired up quicker than my reliable daily driver (less than one second).

I don't really know what I did, but !!!

I couldn't really take her for a small tour though, my automatic 2 weeks of insurance on a new vehicle has expired, and I had to be at work in a little while anyway.

I'm guessing all the air had to work its way out of the lines, and I need to keep a good amount in the tank for now before I address that issue. And that has something to do with the way the pump is sitting in the tank?

Thanks for the help and suggestions. You've been pretty spot on.