Bowen Transport Posted December 31, 2021 Share Posted December 31, 2021 (edited) We have a froze up disc brake on a drive tire. We have tried everything we can think of to get it to cut lose. No luck. Rocking the truck, reverse then forward…nothing. It heated up while trying to pull forward so, Im not sure it’s actually frozen even tho it has been cold and now snowing. we did cage the can and cut off the air….still didn’t help. Any advice? Any ideas? Thanks! Edited December 31, 2021 by Bowen Transport Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/ Share on other sites More sharing options...
Onyx610 Posted December 31, 2021 Share Posted December 31, 2021 (edited) Did you back the pads off? Sounds like you need a new caliper… Edited December 31, 2021 by Onyx610 Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486280 Share on other sites More sharing options...
Bowen Transport Posted December 31, 2021 Author Share Posted December 31, 2021 Yes! Didn’t help! Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486281 Share on other sites More sharing options...
Onyx610 Posted December 31, 2021 Share Posted December 31, 2021 Does it move freely on the guide pins? Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486282 Share on other sites More sharing options...
Bowen Transport Posted January 1, 2022 Author Share Posted January 1, 2022 Only time anything moves freely is when we take the brake can off Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486294 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 The slides should move freely with the chamber on it. Did the problem start when you replaced the brake chamber? Make sure the slides are good and tappets are moving good too Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486295 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 Also tighten down till the pads just make contact with the rotor and back off three clicks Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486296 Share on other sites More sharing options...
Bowen Transport Posted January 1, 2022 Author Share Posted January 1, 2022 Slides and tappets look good. No, everything was replaced on 12/6 by TA in OK. Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486298 Share on other sites More sharing options...
Bowen Transport Posted January 1, 2022 Author Share Posted January 1, 2022 This started yesterday Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486299 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 Have you put a new chamber on it? If the caliper is good and all its workings there really isn’t much left. Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486301 Share on other sites More sharing options...
theakerstwo Posted January 1, 2022 Share Posted January 1, 2022 Mack sure its not a wheel brg froze up.I saw this happen a few years back when a man was working on his truck and found the brakes was stuck.Two days later some one ask him to check for a bad brg and bing go. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486304 Share on other sites More sharing options...
Bowen Transport Posted January 1, 2022 Author Share Posted January 1, 2022 Trying to find a new chamber now. Fingers crossed we get lucky tomorrow! Barging looks good. No signs of it being bad. Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486308 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 (edited) Were you able to get the pads out of it and inspect all the boots and stuff like that? It’s starting to sound like a bad chamber to me if all else is working as should be. Edited January 1, 2022 by Onyx610 Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486311 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 If you can’t get a chamber take one off another wheel and try it on that one Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486312 Share on other sites More sharing options...
Bowen Transport Posted January 1, 2022 Author Share Posted January 1, 2022 Pads and boots look good. We thought it could be a pad at first but it looks good. Thats a good thought, then we’ll know for sure..Thank you! Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486314 Share on other sites More sharing options...
Onyx610 Posted January 1, 2022 Share Posted January 1, 2022 Yea hopefully that’s all it is! Let us know what you find out tomorrow. Hopefully that’s where it ends, if not we can get it figured out one way or another! Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486315 Share on other sites More sharing options...
Onyx610 Posted January 3, 2022 Share Posted January 3, 2022 What did your issue end up being? Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486456 Share on other sites More sharing options...
mechohaulic Posted January 3, 2022 Share Posted January 3, 2022 did you take the service line off the can to see if air is by-passing internally in brake chamber ? parking brake air is putting service brake on enough to heat the wheel. if that's the case, there should be air leak also out quick release valve. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486458 Share on other sites More sharing options...
Popular Post fjh Posted January 4, 2022 Popular Post Share Posted January 4, 2022 14 hours ago, mechohaulic said: did you take the service line off the can to see if air is by-passing internally in brake chamber ? parking brake air is putting service brake on enough to heat the wheel. if that's the case, there should be air leak also out quick release valve. At the End of the day you still got to look at the normal stuff checking to see if air is being trapped in the service chamber This happens on normal drum brakes as well have see the modulator valves stick and hold air on one wheel from time to time! I have very little experience with these disc brake set ups how ever I have seen enough of them to know that they have a place in the system over the road they are a good concept ! For logging and heavy haul not so great, for garbage collection not so great !in an off road situation these tend to wear to quickly and break rotors ! In the packer biz these pads wear out fast and not cheap to replace ! Once these become more main stream the price may come down how ever for now I personally would not have them on my vehicle! The other down side to all this is the manufacturers has left no easy way for a person to check pad wear with out pulling the wheels ! this here in my mind is a huge safety concern ! Just my opinion! 3 Quote Link to comment https://www.bigmacktrucks.com/topic/69001-bendix-disc-brakes/#findComment-486478 Share on other sites More sharing options...
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