Recent content by Entropy455

Can anyone please provide me with a schematic of an air-over-hydraulic trailer brake system? Something basic - non ABS - just what's required to get me up to code for a pre ABS trailer (built and titled in 1965). I found a few brake kits online, however they seem quite expensive. The few...

I appreciate the warning about not taking the air chamber apart. I don't like the idea of snapping a bone from an uncontrolled coil spring letting go. . . . If I do anything, I would simply replace the can. Nonetheless, my main concern is figuring out how the darn air brakes work, and to...

I have not attempted to cross the lines yet. The truck is already put away for the evening. I will attempt it tomorrow. It seems crazy to me that the prior owner would hook the red to blue, and blue to red - for decades of trailer use - in lieu of simply swapping hoses for proper color coding...

I'm a little confused. Please forgive my lack on knowledge on is subject, but what does it mean when you say that the spring brake is caged? Note that my trailer rolls freely when completely disconnected from air. There is no default spring engagement of the brakes when air is lost. The air...

Here's another round of pictures. The master cylinder is more clear. You can also see where the service hose is connected to the emergency port on the air-chamber. I'm trying to figure out how this system "should" work. It appears to be a differential system. Where the emergency air is always...

Ok, files are directly attached. The trailer brakes are not spring brakes. They are air-over- hydraulic. The trailer has no air tank, air valve, or any other air components - just the air-chamber shown (picture from above, and below). The air chamber is connected directly to a hydraulic master...

I just went out and took another look at the air-chamber (shown here) http://i1192.photobucket.com/albums/...psee61eea8.jpg It appears that the red hose is threaded into the service port, and the blue hose is threaded into the emergency port. They are are crossed! Judging by the dirt, they've...

I picked up a 1965 Miller 12-ton tilt-bed trailer, and I need help troubleshooting the air brakes. Here’s a picture of my truck: http://i1192.photobucket.com/albums/aa337/Entropy428/IMG_0898.jpg Here’s a picture of the trailer...

Here’s some PTO information, for the M939 series trucks. Note: I’m posting this information because it was difficult to find, and it might be useful to others looking to convert their truck over to hydraulics. Please let me know if I’ve made any errors below. The M939 series trucks utilize a...

These are being sold by the State of Washington. They are advertised as non-running, but the price sill seems good. ************* REMOVED AUCTION LINKS ******************** If you are going to bid on one of these, do not wait until the last minute to create an account! Create your account...

I drove a piece of pipe into my M923 radiator. It punched a hole clean through the radiator, and also bent one of the fan blades. (it was bone-head accident involving a piece of 1.25" steel well water pipe. . . . .) Is it feasible to pull the radiator’s end-caps and plug the damaged tubes? Or...

The best vehicle I ever purchased, was an old US Navy Shipyard Forklift. It came in quite handy today for installing those 130 pound batteries! I lifted them up level with the battery compartment, and basically slid them into the truck. I was also wondering about the core charge. It takes...

I asked nicely, and Napa lowered the battery cost to 204 dollars each. That was the best price they could give me. There was also a 50 dollar core charge per battery! Thankfully they took two of the old NATO batteries as cores. I'm pretty happy with this truck. It's a 1984, M923, and I paid...

We jumpstarted my M923 at the Fort Lewis DRMO, using another M923 that did not have dead batteries. We drove my truck onto a 30-ton tilt-bed trailer for the trip home. The batteries that were installed my truck (NATO part numbers) will simply not hold a charge. They are sealed lead-acid...

I’m at day 20 (business days) from EUC submitted to Battle Creek – still nothing. I was really hoping to have my M923 over the 4th of July. I’m prior military, and I now work for the Department of Defense as a civilian. I was hoping that my current security paperwork would speed up my EUC...