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I will check into a new one. According to the diesel mechanic at the truck shop said there are 3 check valves on the engine. One at the water separator, one at the filter, and on at the recirc line. So far, I found the o ring at the recirc valve is rough. Ran out of time for today.

I didn't because it is not leaking at all

Any idea where the check valve is on the fuel system? I replaced the filters and gaskets, and fired it up. Came back today and it won't start again.

Sweet, let me know when you get them.

I have been looking high and low, and cannot find door latches for my M1088. One guy has a passenger door one for sale on eBay, but I can't bring myself to pay 160 plus shipping. Is there a civilian market for this part, maybe from caterpillar? I know a lot of these truck parts are common on...

Dam you were fast then! I appreciate all your help!

Nice guess suprman, it was a code for sump temp fault (low).

OK, I will give it a shot

Speeds is smooth

Also, I tried doing the Allison self diagnostic, and when I pushed both arrows it flashed D13312. I did it with the engine running, in neutral.

That must be why it jumped out of 1st when I was turning hard on hard packed millings. Good to know. I have to figure out why the fuel is loosing prime after I shut it off. I don't want to keep using either to start it. I believe it is the primer bulb. Also, right now I am jumping the auxiliary...

I fired it up today, and checked the voltage, had 14 and 28. Brakes seemed to work a little better, and I was able to start out in 1st gear. I guess the default starting gear is 2nd or 3rd, but I manually turned it down to 1st before I started moving. It inspected kinda hard doing it manually...

No, no codes.

No kidding? That must be why my CTIS box has all the lights steady on. How much you want for it?

really hard to read

Ha ha ha FloridaAKM! exactly! they robbed this thing blind of parts! Here is the pic of the missing part. It screws into the elbow and the wire plugs into it. I'm guessing a pressure sensor, but not sure what it controls. I will check into the limp home mode, but the display showed normal...

OK, so, I jumped the solenoid after bleeding the fuel lines and with a very slight dose of either it fired up! So it is running now but there are "cobwebs" all over the place. The air brake system isn't working right, and the transmission will not up shift while driving. I pushed the down arrow...

Yeah, I fell down a rabbit hole researching part numbers, and never checked back in on my thread to see that you had one. Guess I did it the hard way! Lol! Now I am looking for door latches. Dam near impossible.