Bpfd982 Posted December 14, 2016 Share Posted December 14, 2016 Hi guys, on our department we have a 1983 Mack for our pumper with disc air brakes, none of us have much experience with this type of setup and they need to be adjusted, so looking for some info and pointers on where to start, thanks Joe Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/ Share on other sites More sharing options...
1958 F.W.D. Posted December 14, 2016 Share Posted December 14, 2016 Kelsey- Hayes Disc brakes? Pray you never need parts.............. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355097 Share on other sites More sharing options...
gearhead204 Posted December 15, 2016 Share Posted December 15, 2016 do you have the books that came with the truck?, if so check out the brake systems section and see if you have instructions. then if you still have questions once we can identify positively what brand you have , I'm sure one of us could help you! Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355113 Share on other sites More sharing options...
Swishy Posted December 15, 2016 Share Posted December 15, 2016 Try thinkn outside the square Disc brakes spose to be easier so me guess n here ................. hit reverse n hit the brakes or give the brake pedal a full on application with max PSI Jist a Wild Ass Guess But WaddaEyeKno cya §wishy Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355129 Share on other sites More sharing options...
j hancock Posted December 15, 2016 Share Posted December 15, 2016 What are the brakes doing or not doing? Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355134 Share on other sites More sharing options...
Bpfd982 Posted December 15, 2016 Author Share Posted December 15, 2016 No books for the truck around the fire hall anymore wishful thinking, the inside pads are touching the inside of the rotor when applied but the outsides are far from touching Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355188 Share on other sites More sharing options...
j hancock Posted December 16, 2016 Share Posted December 16, 2016 Disc brake calipers need to "float" so they self center on the rotor. Sounds like the caliper has seized to the caliper bracket. Depending on the brand of your system the slide can be lubricated using caliper grease or anti seize compound. Bendix recommends white grease on their guide pins. http://www.cbsparts.ca/admin/bulletins/SD-23-7541_US_003 rfs.pdf Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355196 Share on other sites More sharing options...
BC Mack Posted December 16, 2016 Share Posted December 16, 2016 what j hancock said.... based on your info I am leaning toward them just needing a minor repair. got to ask a dumb question... who has been inspecting/servicing the brakes for the last 30 years? or did you just get it? low mileage vehicles such as fire trucks need a calendar based inspection program added to the normal mileage based items to cover corrosion and like problems. can you take a picture of the caliper so we can determine the brand and era, there may be other issues to consider if the adjusters are odd ball.... BC Mack 1 Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355200 Share on other sites More sharing options...
Bpfd982 Posted December 16, 2016 Author Share Posted December 16, 2016 I'll swing up there hopefully today and snap some pictures, we've had the truck for quiet sometime, but that's not saying it gets the proper maintenance, me and another guy have taken it on to make sure it continually lasts as long as we need it to, both experienced with air brake systems, just this type is new to both of us, thanks for the input so far I'll post some pics of what they are asap Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-355258 Share on other sites More sharing options...
Dieselfool Posted June 1, 2021 Share Posted June 1, 2021 So what happened? Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-474583 Share on other sites More sharing options...
mrsmackpaul Posted June 3, 2021 Share Posted June 3, 2021 Guessing they fixed it or crashed it Paul Quote Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-474672 Share on other sites More sharing options...
Hayseed Posted June 3, 2021 Share Posted June 3, 2021 On 6/1/2021 at 9:34 PM, Dieselfool said: So what happened? ^^^^ pretty good Thread Mine.... The OP hasn't logged in since December 2016.. Fair chance We'll never know..!! Quote "Be who you are and say what you feel...Because those that matter...don't mind...And those that mind....don't matter." - Link to comment https://www.bigmacktrucks.com/topic/48039-1983-mack-brakes/#findComment-474673 Share on other sites More sharing options...
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