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LMTVs have a Schrader valve as part of the wheel valve assembly. If there were another one in the tire the one on the wheel valve would not release pressure, which mine does. This weekend I replaced the manifold valve assembly with an expensive new one. CTIS still does not deflate and I still...

Is that how the Army mechanics disable the CTIS? I deflated one tire by removing the schrader valve from the wheel valve. If the tire had an additional valve core in the tire I think it would not have deflated then. Should I check each tire? Would one tire with an extra valve shut down the...

The new CTIS control wire harness finally arrived. I was certain I had isolated the problem with the troubleshooting guide, but the new harness did not change a thing. I still have three solid lights. I guess the manifold valve assembly is the next thing to replace, even though the solenoids...

Each of the 4 LMTV batteries on its own is 12V. The fail-safe way to charge these with a car charger is by disconnecting them from each other and charging one at a time. If the batteries stay connected the total voltage may be 24V not 12V, regardless of where you connect the charging...

Well I guess I will answer my own post. Most alternators have a bushing in the rear mount to help ground the case. I don't think mine had one since the time the Army installed my alternator, which has a date of Oct 2012 stamped on it. The alternator was free to wiggle around and must have...

In less than 500 miles, I have seen the 8in bolt that mounts my LMTV alternator to the lower pivot point break twice. It happened today near the CAT engine repair place in town. They said I needed a bushing for the aft hinge point. I have a newer alternator, the N1511, and the LMTV parts...

That might work, but at least one of the suspect wires splits into two before the break. Continuity is OK on one side of the split, but not on the other. That's how I figured out that the connector at the CTIS controller must be OK. The break is at or downstream of the split, but either way...

There is another post by a guy in Alaska who had 5 solid lights on his CTIS controller. That was the only information about it I could find on the whole internet and led me to purchase a new control box. Once I put the new one in, the CTIS came to life, hissing and honking. Now I just need to...

I really wanted a HEMTT, but settled for an M1078. Keep us posted on your schedule. I'm also in Tucson, and would love to ride out to meet you and escort that beast through southern AZ with the LMTV.

I found the electrical fault guide in the TM for "CTIS does not deflate" (table 2-7, fault no. e84) which had really easy steps to check the solenoid and the continuity in the CTIS control wiring. The solenoid was OK. Two of the three wires going to the lower plastic plug on the manifold valve...

OK I'll take the gentle route. The TM has a test for each of the wires going into the unit, although they all appear well-maintained. I just read that this manifold also has the engine fan control in it too. How many solenoids are in this thing? The TM just has troubleshooting and...

Based upon what you guys have told me I am convinced the PCU, or "manifold valve assembly" as it is labeled in the LMTV repair book, is the culprit. I found a simple test for the solenoid on page 2-918.4 of the repair book. Since a fully functioning LMTV contributes to my overall health, I am...

I guess I will squander my next weekend working on that part. Thanks.

Thanks for the help. I reassembled the wheel valve and tried the hammer on the others, but still no pressure release when i loosen the test screws on the wheel valves. CTIS inflated the flat tire. I read somewhere that CITS does not inflate a completely flat tire but maybe that is on other...

Recent LMTV purchase. 5 solid lights on CTIS controller. Replaced controller with new one, now I get 3 solid lights. I followed the TM troubleshooting for 2 solid lights, since that is the closest thing to my problem that is addressed by the TM. Leak checks all OK. All four wheel valves...