B model front brake limiting valve

[Dennis]

I can't seem to get the front brake limiting valve to work properly. Maybe, I don't have it plumbed correctly. I put in a new TW-1 valve in the dash and a new LQ-2 release valve which is connected to the two front brakes, however, when I flip the dash valve lever it does not disengage the front brakes. I know the dash valve works as it is putting air to the LQ-2 valve. When I step on the pedal valve the front brake chambers still move. I am using air from the air manifold to the dash valve and it then feeds out the dash valve to the release valve.

Anybody know what I've done wrong?

Dennis

[theakerstwo]

It never diables the front brakes but only limits the air pressure some for slippey roads.

[Freightrain]

You'll have to drive it to see the difference. Or put a pressure guage on the line going to the chambers to see the pressure difference.

Once I hooked mine back up, I made the mistake of trying it one day. Oops. Only do it in a safe place(if you are a single axle with no load). Man. it don't stop for nut'n!! Guess it works?? LOL!!

[Dennis]

Thanks for the info, guys. I thought maybe that was the reason the adjusters where still moving when I pressed on the pedal. I will make sure they are engaged unless it is raining.

[skip]

As mentioned above, it doesnt engage the brakes, it allows air on the top of the diaphragm of the LQ2 so when you do apply the foot brake- and air fills the opposite side of the diaphragm, it wont travel as far, therefore limiting the amount of air going to the front brake boosters.

[Dennis]

Okay, thanks again. I got it. "Engaged" was a wrong choice of words. I guess the only way to really test it out is when I get it back on the road. Air pressure to the front brakes will just be reduced with the two way dash valve flipped over to "slippery road" position.