- 12
- 3
- 3
- Location
- Atlanta, Idaho
Our fire dept built a water tender out of a M931A1 we may need to add auxiliary braking system we need to know if it can be done. If so has anyone done it??
Gene
Fire Chief
Gene
Fire Chief
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M931A1 help
- Thread starter genefireguy
- Start date
- 12
- 3
- 3
- Location
- Atlanta, Idaho
The inspection checklist for sending truck to fires now says " All vehicles 36,000 GVWR or greater shall be installed with an operator-controlledauxiliary braking system in addition to the service brakes (i.e., engine retarder,transmission retarder, driveline retarder, or exhaust retarder " so guess my Question is can I add one of theses to this truck?
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- Location
- Orygun
The truck already has air powered wedge brakes at six wheels, so the E-Brake at the T-case should be considered an auxiliary brake .
I have 2 6x6 tenders and they have never questioned this on mine, one is a Deuce and the other a M931A2, assuming yours is the same ...
Then you need to install a standard tractor parking valve so you can use your emergency brake without it locking the spring brakes up.
- 445
- 837
- 93
- Location
- Orygun
Ya I don't see where the secondary brake system has to be completely separate in acuation from the standard brakes, it just has to be there, so if you pull the brake handle up and the main brakes don't work, you still have the E-brake which is manually activated and will still function .
It is purposely designed this way (obviously) for a reason, that reason being that the soldier in the field doesn't have to think twice or grab a second lever, one and done .
Don't over think it, they just want a back up fail safe, the fact that it is on the same lever should have nothing to do with it .
It is purposely designed this way (obviously) for a reason, that reason being that the soldier in the field doesn't have to think twice or grab a second lever, one and done .
Don't over think it, they just want a back up fail safe, the fact that it is on the same lever should have nothing to do with it .
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All A2 trucks have the mounting location for a push pull parking brake valve to be installed. The hole in the bracket that goes from the shifter to the dash board. Enlarge it. T your supply for the valve off of your spring brake override supply. This still is a spring brake tank air supply.
Plug the supply port off behind the drivers step and connect a union the spring supply and run it to the parking valve.
Cost is around $75 for everything.
Plug the supply port off behind the drivers step and connect a union the spring supply and run it to the parking valve.
Cost is around $75 for everything.
- 12
- 3
- 3
- Location
- Atlanta, Idaho
My guys are asking if you have any pictures of this if you have already done this.
Thanks Gene
Your truck already has the trailer valve to the left of the shifter. can add the parking valve in that hole in front of the shifter. You can get supply air either a T into the spring brake override or run it from under the truck. Doesnt matter.
https://youtu.be/ELcWO5Q2A1w