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Start simple....check that you have good solid hose connections on your fuel lines from the fuel tank to the injection pump, especially at the fuel filter. Check your fuel tank vent and blow out the vent line from the tank forward to the filter. if you open the fuel cap, is it hissing ? Have you...

Bypass and forget about it....don’t forget to open your fill plug on the Tcase to drain the excess ATF, and don’t forget to fill the transmission back up.

Yes, a broken motor mount will allow blade contact with the shroud. Also contact will occur if you didn’t adjust the radiator stack and shroud correctly. Normally you will get contact when off road or any sort of body flexing, like going over even a speed bump at an angle. You will notice that...

that Tach pulls its signal from the Tach drive...so yes, you will lose your Tach signal

You will if you tapped off the signal, the military Tach kit for the HMMWV uses the generator for its Tach signal. if it were me, I would sell the H1 A/C to an H1 guy and take the money and buy a form fit aftermarket AC kit for a HMMWV,

All 6.2 and 6.5 regardless of year are the same....I have 2008 6.5’s.

I’ve never seen a kit installed in 30yrs of being in the military...I’ve personally installed 1 or 2, can’t hurt. it was designed to prevent what’s happening your hood....but ideally install before an issue.

https://www.accuratediesel.com/shop/235.html part no. 7849302

TSU just determines if the motor is 120 and above or 120 and below...if below? It starts the glow plug cycle, if above, it won’t. sounds like a bad box....

Unplug the TSU connector and plug it back in....S3 EESS isn’t seeing the TSU

You glow plugs are shot, starting box is bad or both....time to troubleshoot.

roof supports? No...remember, M1151’s don’t have a roof support the same way the m1114 and M10xx trucks do.

Great right up....definitely needs to be a sticky i just came into about 10 M1151 turrets

There is not more confusing than all the turret crap in the TM and the various bits and pieces

The cable just needs to respooled to feed off the bottom when the rear is installed on the front of the truck...I’ve installed them before.

Absolutely no whine in the PS system, turns effortlessly...more inclined to think it’s a bad fan clutch, maybe even debris in the lines to the clutch. The fan isn’t fully engaged, when I unplug the TDM, it locks up fully, when accelerating it sounds half or a 1/4 engaged. now, it’s not a...

Yes, replace the 25yr old hoses...

My issue is starting to look like low PS pressure or a bad/weak fan clutch.

You said you replaced your start box? With exactly what brand and type? New or used box? Battery disconnected during swap yes or No?

Just clean the holes up, install plastic plugs as the mfg does on unused holes and paint the truck. i do about 2 M1123’s a month...once painted you can’t see the plugs even a few feet from the truck unless you look.