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Thanks! I'll test it out. I guess I can add a 25 gal auxiliary tank on the emergency side if needed. Does it need to be isolated at the end with check-valve and manual cut-off valve? Of course, don't want it to interfere with emergency brake reservoir. I'll be looking a the TM air schematic, but...

I think I might be having this problem? I want to use the service side air to run some air tools. The valve is open but no air? So do you have to have the brake peddle pressed to release air? I think I tried that, but no air. If so, do I need to create some type of AUX bypass to make a constant...

Go to Harbor Freight. You can put the same thing together for $150.00. And... if it gets ripped-off, you just go buy it again.

Anyone have a suggestions on a heater core replacement other than mil-spec original? Maybe someone has tried a rear passenger heater core from a Suburban or other vehicle? Sounds like my original can't be fixed, but I'm going to get a second opinion. Any ideas would be appreciated.

Yes, that's it! I could not find any explanation for what it was. Yeah, my pumps need a thorough cleaning. The aux pump had a bunch of rusty dry scale inside the strainer. It has probably never been used. The other primary and secondary were so dirty, I can't believe the generator even ran. I've...

Is this a special type fuse attach to each Facet fuel pump? I can't find any information on this part in the TM. Obviously, it is an OEM part of the Facet pump assembly. I damaged the one on my auxiliary fuel pump. They are filled with light oil. Looks like some type of explosive proof fuse to...

I got very lucky on this truck. It only had 17 hrs on it since the depot referb. I thought the engine was broke-in at 40 hours, but it keeps getting better! I have 88 on it now. I need to do an oil change. I bet you can get 8+ yards on that truck with the side-wall extensions. The dumb bed is...

I've though about building some side panels like yours. Nice!

Well, I pulled a huge mulberry tree stump 2-1/2 tons out of the ground, no problem! Hauled off full load of debris. Last week did the cruise night thing. The week before, I packed rear bearings and changed tires over to new 395/85s. Much better ride depending on the tire pressure. 70lb seem to...

Well, after working through all four rear hubs today this is my conclusion to this thread. The problem was a dry bearing. The brakes were fine on all four hubs. I thought the brakes were an issue on the right rear, but after cleaning and going through all the motions, everything was fine. At...

So.., the left-rear>rear looks good. Plenty of grease and oil mixed. I will go ahead and repack with grease while I have it apart. I feel very lucky to catch the right-rear bearing issue before a major failure. It was barely lubing itself with gear oil. If you haven't checked your wheel bearings...

Okay, just to clear up an misconceptions about grease or oil bath. You must grease the bearings, period! The TM says so! Yeah, oil lubrication is part of the equation, but they need to be packed with grease. Certainly not a 1/4 gallon per hub like I found on XM818. The hub cavities had more than...

Brain drag too! Well, I forgot that when the axle shafts are pulled your hub is going to spin if the brakes are not en-gauged. It's been a few years since I have done this, plus a different brake system.:? Got the brake caged, so I'm ready to adjust, pack, and reset the bearing tension. I guess...

Thanks! Believe me, there is no guessing around on this end. That's why I'm asking these questions and looking at the TM(s). Looks like the problem is a brake shoe dragging. So, I've got to adjust the brakes on that side. Might as well check them all as I replace the tires with new 395 XLZs. I'm...

Okay. I'm not familiar with caging the spring brakes, but I've seen the article and know what you are referring too. The M939 series truck with air brakes is new territory for me. I really like the simplicity of the 800 series truck. I'm sure working knowledge of the 939 series will come fast as...

Thanks for all the replies. I hope my questions and replies are going to the thread. I'm new here, so I haven't spent much time on learning the forum interface details. Going to go pull this hub off now. I will post some pictures of what I find. Hopefully nothing!

No infared temp test. Just to the touch, and there was considerable difference. Too hot to leave your hand on it for more than 5 seconds. Explain the stuck wedge? I'm not familiar with this condition.

I will be following the TM instructions from this point forward. Someone said spin the axle checking for drag. Unless all 4 wheels are off the ground, I'm not spinning anything. So, I assume I must drop the propeller shaft on the rear to isolate it singly. When I re-worked my M818 bearings and...

There is an outer seal. It goes against the outer bearing. It's not a "discard" or throw away part unless it is damaged. If the other hubs have grease, then someone forgot to grease this one.

10/4 on that! This truck sat for years after the depot overhaul. I felt like the best thing I could do is run it and see if any problems surface during first 100 hours or so. How is oil maintained in the hub cavity? Obviously, it comes from the differential and flows outward. If the differential...