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Thread: How do you stop a m809 if the brakes fail?

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    General 319cssb's Avatar
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    Default How do you stop a m809 if the brakes fail?

    I know downshifting through the gears will slow down, but then?
    How do you stop without hitting something if you need to stop faster? And find out the brakes won't slow you?
    I will either find a way, or make one!
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    I hate people, who use big words just to make themselves look perspicacious.

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    4 Star General NDT's Avatar
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    Aim for the least expensive thing in front of you.

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    emergency brake. tighten the knob as you pull it up.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
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    Have you ever had the brakes fail on you in your M809?
    Not sure but are they not single circuit brakes?
    I will either find a way, or make one!
    --------------------------------------------------------------------------------------------------------
    I hate people, who use big words just to make themselves look perspicacious.

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    I have a 816 and a 813 truck that do not have brakes at all that I never have fixed. I mope them around the yard or around the local streets slowly using the emergency brake to stop but i never get over about 15mph.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

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    My first impression was to kill the engine, but a diesel can keep going if it can pull hard enough on the fuel source and especially if it has an engine driven mechanical pump.

    Aim for a row of Prius' I guess...

    BDGR

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    Quote Originally Posted by Bulldogger View Post
    My first impression was to kill the engine, but a diesel can keep going if it can pull hard enough on the fuel source and especially if it has an engine driven mechanical pump.

    Aim for a row of Prius' I guess...

    BDGR
    pulling the manual shut off in center dash will kill it dead in the water as it closes the fuel feed completely.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

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    Default How do you stop a m809 if the brakes fail?

    I've had the brakes fail. If they were working fine but have a line ruptured or something to that effect you will usually have two pumps of minimal breaking. Use them wisely and downshift while applying the E break. This is a great reason to check your break fluid level before every trip! If you lose brakes just because the system has a slow leak and the MC gets too low, that is absolute stupidity on your part.

    Also, if you kill the engine that will severely limit your ability to downshift unless your synchro's are in amazing condition. You won't be able to bump the RPMs way up to shift into another gear. If that happens, you're in a panic situation with no breaks and no power steering. Best bet is to leave the engine running, downshift, apply the E break and look for soft ground to drive on which will slow the truck down naturally or safe place to "crash" if all else is unavoidable.


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    Last edited by 162tcat; 02-05-2019 at 12:02.

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    4 Star General porkysplace's Avatar
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    Quote Originally Posted by simp5782 View Post
    emergency brake. tighten the knob as you pull it up.
    That's a parking brake and not going to do much with any weight or speed other than come apart.
    Might give you a feel good moment but won't stop the truck.

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    That is why you twist the knob as you pull it to increase pressure slightly as you pull up... It will stop a truck... It will stop a wrecker going 25mph as it slows enough combined with downshifting to stop it. It does work so don't try to negate the fact that it will come apart... It will hold up in a stopping situation. It is a decent sized shoe. Don't always look at the negative side of something won't work.
    2008 F-250 6.4L Powerstroke
    1984 AM General M923A1 ( Big Cam III NTC-400, HT3B turbo, Intercooled, #15 button, Dual fuel Line setup - MRAP Aluminum Radiator - 8" Ram Air Intake system - Dual 115 gallon tanks - Air Conditioning - 145amp alternator - Puradyn Oil Bypass system, CAT 7155 16speed transmission, Oshkosh 55000 Transfer Case, riding on 16.00 AT-3s on HEMTT wheels. )
    83' M923A1
    M796 Bolster
    M322 Equipment Trailer
    MEP-804A


    901-318-8353 for Help in and or around the Memphis area or transporting in the southeast. Text me first before calling.

    Tires (HMMWV, 395s, 1600s) and Transportation Vendor

    Wes

    Videos at https://www.youtube.com/results?search_query=5782simp

    https://www.youtube.com/channel/UCTd...D4dOJidPFnmYGA

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