Home Forums Technical Questions Brake Failure on my 56 PGSG

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  • Douglas E Fresh
    Participant
    Post count: 196

    So, a month ago right before the Idaho trip I spun a  rear drum in Delta on my way KCW.  Anyway, got that fixed but the other night I was going back to Delta to see a friend when my brakes completely lock up on the highway.  I’m going to tear everything apart in a few hours after work and I wanted some thoughts/input perhaps from those in the know…..

    About a mile outside Delta I could begin to smell brakes burning.  At first I thought it was the truck that past. But the smell got worse.  As I enter town, it feels as though my brakes have completely lock up.  The pedal was all the way up, but there was ZERO movement.   I pull off the side of the road pointing slightly uphill.  As I get out there is putrid smoke coming out from behind all four wheels and the hubcaps and wheels are EXTREMELY hot.  I sat on the side of the road waiting for things to cool down, and when halfway cool enough I crawl under the bus but don’t see anything out of the norm other that a piece of that stretchy, green landscaping tape had somehow wrapped itself super tight around the master cylinder.

    Anyway, I cut the tape from around the master cylinder off and was able to roll it about ten feet in reverse which seemed to unlock the brakes a bit and gave me a little bit of pedal, although still incredibly tight. After letting it cool down a bit more over a beer i was able to drive it home (20 miles) with no issues, other than the incredibly tight pedal.

     

    Any ideas?  Ive never heard of all four wheels locking up like that on their own, it was like they activated by themselves.

     

     

    Franz
    Moderator
    Post count: 4405

    You need to have free-play on the master cylinder pushrod/pedal. If not, the compensating port will be covered and not allow fluid to transfer to the reservoir as the brake fluid expands (heat from use), causing the brakes to “self engage”.

    Sounds like that tape may have limited the pedal return and caused the problem??

     

    master

    Douglas E Fresh
    Participant
    Post count: 196

    I think you may have nailed it.  Gonna head home and take shit apart and readjust.  Hopefully be up for the races tomorrow.  As always, Thanks Franz.

    Douglas E Fresh
    Participant
    Post count: 196

    Do you guys have brake cylinders and shoes for my bus at the shop?  If so I’ll run up and pick some up.  Got around to tearing it down today and I have brake fluid squirting out of rear drivers side and shoes look spent…. thanks as always

    Franz
    Moderator
    Post count: 4405

    We have some rear brake shoes and cylinders set aside in a box.

    Your bus probably has beetle brakes in the rear because it lowered with strait axles. Bring a shoe and wheel cylinder to match..most likely 58-64, but could also be 65-67 or even type 3 if the drums look like large diameter.

    Your local Napa will probably have beetle brake parts in stock too.

     

    John Jones
    Moderator
    Post count: 8200

    Doug….  get that shit fixed!   There was another guy at the valley rally from montrose….  you guys could have rolled together!!

    more miles in your bus!!!!!!!!!  That bus brings you happiness!!!!!

    Douglas E Fresh
    Participant
    Post count: 196

    Workin’ on it G…got everything on order at least.  Type 3 stuff, bought the expensive german cylinders.  Hope its money well worth it.  Which bus was from Montrose?  I didnt recognize any from the pics.  Also saw a sweet black stock oval cruise by me this morning…..more and more are popping up.

     

    Also…sorry for calling on a sunday, I know its tacky.

    D-

    John Jones
    Moderator
    Post count: 8200

    the type 3 brakes are the best way to go…. and expensive.. ofcourse! 😎

    Lets do more trips next season!!!!!!  Your bus and rusty inspire me to get my lowered bus going again!!!  I still love em!!!!  😎

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