M923 spring brake emergency control ?

[cagosti]

Greetings
I wanted to ask... when you push in "spring brake override" that disables all air assisted brakes and
allows you to test your floor mounted parking brake correct?

what else would you use it for ?

thanks
charles

 

[simp5782]

Greetings
I wanted to ask... when you push in "spring brake override" that disables all air assisted brakes and
allows you to test your floor mounted parking brake correct?

what else would you use it for ?

thanks
charles

In the event the linear valve that is attached the driveline brake handle fails and does not send air to the rear spring brakes when it's time to gtfo of dodge so you aren't just sitting there with a truck that won't release the rear brakes cause of one bad valve.

The linear valve on the handle acts the same as a push pull parking valve does on a semi.

 

[juanprado]

Please read the -10 operators manual.

 

[cagosti]

Juanprado
Please do not answer sincere questions with that answer ..yes i have read most of the 496 pages but im not sure i understand it
it just says to do it, not how it works .. is there an air component that sets the air assisted spring brakes when you use the floor mounted parking brake ?

or does it just apply the mechanical band on the driveshaft ?

 

[cagosti]

The linear valve on the handle acts the same as a push pull parking valve does on a semi

what handle? the floor mounted parking brake of the push on the dash?

 

[simp5782]

The linear valve on the handle acts the same as a push pull parking valve does on a semi

what handle? the floor mounted parking brake of the push on the dash?

The floor mounted parking brake has a linear valve hooked to it. That is the little roller thing with an arm on it that causes the honk from the air vent when you pull the floor brake handle up.

The button on the dash is to override the valve on the parking brake handle in the event the one on the handle fails so the truck can still be mobile.

 

[cagosti]

thanks
it seems a little weird that the button on the dash will kill your brakes in case of an issue that doesn't seem to happen very often.
most of the brake failures I read about are system air loss and the little green button wont help with that !

 

[simp5782]

thanks
it seems a little weird that the button on the dash will kill your brakes in case of an issue that doesn't seem to happen very often.
most of the brake failures I read about are system air loss and the little green button wont help with that !

It doesn't kill your brakes. It just overrides the parking spring brakes. The service brakes still work as they normally would.

It's just for in the event that a valve goes bad you can drive the truck rather than having to wait for a wrecker since the driveline brake can act as a parking brake with the spring brakes overrode.

 

[jonesal]

Juanprado
Please do not answer sincere questions with that answer ..yes i have read most of the 496 pages but im not sure i understand it
it just says to do it, not how it works .. is there an air component that sets the air assisted spring brakes when you use the floor mounted parking brake ?

or does it just apply the mechanical band on the driveshaft ?

Juanprado could not be more correct. AND he said please.

Allen Jones
Brookings, SD