M923 Transfer case problem

[1SICKMJ]

Ok I work at Hawaii Volcanoes National Park and we have an M923 and the switch to engage the front axle or the transfercase on the dash leaks gear oil out of the air lines. Is something broken because we un hooked an air line that pressured the tranfercase and the oil stopped going up the hose to the dash. Anyone know what this is or got any hints before we start tearing into it once it gets back from Kahuku Ranch. Thanks in advance.

 

[steelsoldiers]

Howdy. If I had to guess, I would say air is leaking into the t-case from the interlock (red) and is being forced past the seals on the actuator assembly (blue). Check out the air line diagram in volume 4 of the TM to see if there are any other direct air connections to the t-case that could be forcing oil past the actuator. I can't remember off hand and don't have it on my work computer. You can download the TM in the Resources section of SS if you don't have a copy handy.

 

[1SICKMJ]

Do you know the number for the TM. I looked yesterday and I could only find TM for the older 5tons.

 

[steelsoldiers]

Army TM 9-2320-272-24-1, -2, -3, and -4.

 

[Buttweet]

I go to JATONKA`s for these TMs.

 

[99nouns]

Howdy. If I had to guess, I would say air is leaking into the t-case from the interlock (red) and is being forced past the seals on the actuator assembly (blue). Check out the air line diagram in volume 4 of the TM to see if there are any other direct air connections to the t-case that could be forcing oil past the actuator. I can't remember off hand and don't have it on my work computer. You can download the TM in the Resources section of SS if you don't have a copy handy.

These are actually 2 of those on the Tcase, is that the one on top?

 

[fuzzytoaster]

Be sure which interlock is it first. Solenoids A & C are identical units and I have new replacements for $120 shipped if needed.

 

[rchalmers3]

It's been 7 years since the original post. Hopefully he made it off the mountain by now and found a solution.

Rick