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Curious , I disabled the ctis and now I’m looking to free up room in the cab , the two air lines come in and route to the Eaton box. Then there’s the all the wiring....Can I remove all of this ? I haven’t traced everything yet and I’m sure I can figure it out but thought I’d ask for some...

So this actuator box thing dohicky that controls air to my front hubs and low range has rusted through on the top. Anyone know the technical name and where I can order one ? 1990 m931a2

My horns have insufficient air pressure , curious if there’s a common issue where the air lines get plugged. I’ve been looking for a schematic to see which tank runs the horn and everything in between.

Ive had this truck almost a year and just before winter I noticed the truck rocked back and forth like there was a 2x4 strapped to the front tire making it undrivable anything over 5 mph , so I bought some new tires on rims thinking I had a bent strap ,and just swapped out the front I thought...

I just picked up a m931a2 and today for the first time I engaged the front axle . There is a constant air draw sound for as long as I leave it engaged. Not sure if that’s normal or not Then I un-engaged the front axle , drove for a mile and noticed I’m leaking from the front ABS limiting valve...