m931 break adjustment

[allie]

is there an adjustment for the mechanical breaks they are not holding .the adjuster on the handle is as tight as it can go

 

[VPed]

There is another adjustment at the parking brake, on the rear of the transfer case. There is a long section of threaded rod on the end of the actuator cable with an adjustment nut.

 

[allie]

There is another adjustment at the parking brake, on the rear of the transfer case. There is a long section of threaded rod on the end of the actuator cable with an adjustment nut.

ok i’ll take a look. i’m assuming i’ll need to first loosen the adjustment on the break handle in the cab then tighten that nut your talking about? sound correct? thanks

 

[Mullaney]

ok i’ll take a look. i’m assuming i’ll need to first loosen the adjustment on the break handle in the cab then tighten that nut your talking about? sound correct? thanks

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Yes

 

[allie]

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Yes

thank you also would you be able to confirm an oil filter canister gasket item# 153528 as being correct? m931 with NHC 250 cummins thanks!

 

[DeMilitarized]

The cable is just used for a secondary emergency parking brake drum on the transfer case. Your primary parking brake holding should come from the air system dumping the air out of the brake canisters to the atmostphere (intake stack) It sounds like you have a blockage in your air release line that is not allowing your brake chambers to lock back up

 

[allie]

hm

The cable is just used for a secondary emergency parking brake drum on the transfer case. Your primary parking brake holding should come from the air system dumping the air out of the brake canisters to the atmostphere (intake stack) It sounds like you have a blockage in your air release line that is not allowing your brake chambers to lock back up

hmm any suggistions on where to start? thanks

 

[Jbulach]

Make sure the cage bolts are not installed in the brake cans.

 

[allie]

Make sure the cage bolts are not installed in the brake cans.

not sure what that is man i have to learn more

 

[Jbulach]

The caging bolts should be stowed on the side of the can (circled in red) or missing. If there are threads sticking out of the hole plugged with the red cap (red arrow) then your spring/park brakes are caged and cannot work. The rear 2 axles are the only ones that have “parking” brake chambers.

 

[Jbulach]

This is what the brake chambers look like when they are caged. Installed cage bolt circled in red.

 

[allie]

ok ill take a look so if that bolt is sticking out what would be the fix

View attachment 954306
This is what the brake chambers look like when they are caged. Installed cage bolt circled in red.

 

[allie]

ok ill take a look so if that bolt is sticking out what would be the fix

so this is the main breaks

 

[Jbulach]

Looks like your brakes are NOT caged, so I guessed wrong.

You do not use the spring break override, that button should always stay out except in an emergency/combat situation where your spring breaks are locked and you cannot release them otherwise. If you are pushing that button in as normal operation that would explain why your spring brakes are not applying with your parking brake lever.

 

[allie]

Looks like your brakes are NOT caged, so I guessed wrong.

You do not use the spring break override, that button should always stay out except in an emergency/combat situation where your spring breaks are locked and you cannot release them otherwise. If you are pushing that button in as normal operation that would explain why your spring brakes are not applying with your parking brake lever.

ahh ok so this explains when i use the handbreak in combination with that spring override out it then holds

 

[allie]

ahh ok so this explains when i use the handbreak in combination with that spring override out it then holds

ahh ok so this explains when i use the handbreak in combination with that spring override out it then holds

it must have been in when i use the hand break o man i feel dumb lol ok so keep it out then we see if that handbreak works correct?