New deuce, need a little info... Possible treat

[MudMarine]

So we just bought a deuce that looks like it was an Airforce version with the dual brake system mod. Do all M35's have two brake airpacks? Well this one has a line coming from the passenger air pack, up into the engine bay by the air cleaner that is not hooked up to anything. Any idea what should be here?

Also in the barn next to this truck is a 1971 M35(?) 5 ton wrecker. Bigger motor and a stick shift. It has some issues, possible brake leak, lift cylinder leak, weird thunking sound from behind the dash after in ran for a few minutes, enough to build air pressure. It was a loud metallic click about once per second. Cracked driver and passenger door class, otherwise seemed to run great.

I'm going to try and post pictures of both.

 

[MudMarine]

How do I attach photos from my phone?

 

[gimpyrobb]

That is the vent.

The wrecker is either an m62, m816, or m936.

Could also be an m246 or m819, but those are not as common.

 

[pontiac62]

New duece, need a little help... Possible treat

How do I attach photos from my phone?

Use the paper clip icon to attach photos from your phone. Then when your photos pop up check the one you want to attach.


Sent from my iPhone using Tapatalk
Man of few words

M1081 LVAD

 

[dmetalmiki]

The 'click' you hear if somewhat regular, and after air pressure builds up, could be a faulty Unloader valve. That is mounted on the firewall in the engine ompartment.

 

[SETOYOTA]

Email to me and I will post. Setoyota@aol.com

 

[clinto]

So we just bought a deuce that looks like it was an Airforce version with the dual brake system mod. Do all M35's have two brake airpacks? Well this one has a line coming from the passenger air pack, up into the engine bay by the air cleaner that is not hooked up to anything. Any idea what should be here?

The only M44A2 series trucks with dual circuit brakes are the 1987-1989 USAF contract trucks. They have 87K, 88K or 89K USAF registration numbers and their VINs begin with either 1040, 1041, 1050 or 1051.

I'll have to look at mine tomorrow. Somebody remind me.

There is a TM related to the dual circuit brake system. It's the SMARPI manual and it's in our TM section, available for free download.

 

[fasttruck]

As stated post 3 it is the vent from the hydrovac to the atmosphere via the air plenum. Transmission and transfer case probably also vented same way. This was part of the military's provision for deep water fording capabilities. Vents on axles are also military specific to keep water out

 

[MudMarine]

Woo! What a busy week! So we bought the M35 but waved off on the wrecker. The owner is asking 8,500 and hasn't listed it yet. Shoot me DMs if your interested and I'll pass off his contact info. Stupidly, I did not take a picture of the data plates.


The M35 we bought has an 88k in the SERNO and I honestly figured it was overhauled in 1988 not manufactured then. We did download the dual brake TM but I couldn't find this line when looking at it on my phone. (didn't have my laptop available). We ended up capping this line which allowed the brakes to build enough pressure for us to feel comfortable driving it. I'm still curious though, if its a vent line then how come it was shooting fluid when the brake pedal was depressed with the truck off?


My phone wouldn't let me use the paper clip attach function, seems like the error was on my end. Now here's the money shots! This truck turned out to be a great purchase and I'm excited to have it!

 

[MudMarine]

The 'click' you hear if somewhat regular, and after air pressure builds up, could be a faulty Unloader valve. That is mounted on the firewall in the engine ompartment.

That sounds most likely because it started about when the air tanks were full.