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Subscribed. These replace the 27450C which I am very happy with but are discontinued.

If it were me, I would first evacuate the system using a vacuum pump, then charge with 300 psi nitrogen, and see if the system maintains pressure over a few days. If so, drain the nitrogen and evacuate again, and charge with R22. You will need a vacuum pump, a bottle of N2 with regulator...

If for sure the TCU is good, suggest you check out the VIM under the power panel for issues such as blown fuse.

X usually means “I am dead, send me to Transmissioninstruments.com”.

2.5 miles with no oil pressure would equate to a grenaded engine.

When Stewart and Stevenson / BAE lost the FMTV contract to Oshkosh, it was a very unhappy period in Sealy Texas. Everything the S&S team had worked on for 20 years was gone. Everything they had either went for auction or in the dumpster.

If you live in flat Florida, all you need is a 4L80E transmission upgrade to get higher speed and keep the 6.2 alive.

Has anyone had any luck for parts at the Case parts house saying "I have a W11 loader" which the M4K is based on?

Great looking truck, paint and markings are first rate! That is actually the correct color for 1951.

Yes the 4 wheeled trailer is a M14 or M17 director trailer from WWII. Used to carry gun directors and generator sets.

Wiring looks really bad. Suggest this needs to go home on a towbar, wrecker, RGN.

I would inspect each and every pulley for nicks. I would put a straightedge on each pulley to make sure it’s not out of plane.

See pic

I believe that is the modern version of the AB-15 antenna.

There is, problem is, it was made of canvas, and hasn’t been made since the 80s, and my experience has been most canvas items that old are dry rotted. Suggest you get dimensions of what you need and reach out to one of the canvas outfits for a custom made item.

Love mine, so dependable. But oh so expensive to keep legal on the road.

If you have the 7155 transmission you have a 915 “A0”, it will have the huge bypass filter mounted on the firewall.

Sound like fuel starvation. Plugged filter? Be aware of the handling characteristics of the A1, yank the steering wheel at high speed and you will roll.

Do you mean R22? That is more or less all that will work in there.

Does it have refrigerant in it? Usually these get drained prior to going to drmo. You might be able to jump out pressure switches to see if the compressor is good.