fxfymn Posted June 5, 2011 Share Posted June 5, 2011 My Type 75A fire truck is equipped with a disc type of parking brake. The pads are "chattering" against the disc when I let off of the power. My Mack manual does not cover this type of brake so I was wondering if anyone has any advice on how to adjust the brake to take the play out of the pad assemblies. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/ Share on other sites More sharing options...
mowerman Posted June 5, 2011 Share Posted June 5, 2011 are you sure,its that,,and are yuo sure its disc,and not drum?bob Quote Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/#findComment-79134 Share on other sites More sharing options...
fifth wheel Posted June 6, 2011 Share Posted June 6, 2011 I would check the disc for true or for rust spots. There are a couple types of disc brakes setups, the Tru-Stop adjusts differently from others. Not sure out of adjustment would cause chatter.FW Quote Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/#findComment-79175 Share on other sites More sharing options...
fxfymn Posted June 6, 2011 Author Share Posted June 6, 2011 Yep, it's a disc. I ended up having to totally disassemble it because I believe the chatter is being caused by either a bad transfer case bearing or bad drive shaft carrier bearing. I'm going to have the pads relined and go from there after I get the transfer case issue fixed. I'm stil interested in hearing any recomendations on the correct adjustment procedures. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/#findComment-79194 Share on other sites More sharing options...
mowerman Posted June 6, 2011 Share Posted June 6, 2011 ok,then i would try put a spring shim,some where,on the bolts,such as a harley davidson anti rattle,calaper shim...all i can suggest,,,guess i,d have to see it.good luck,bob Quote Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/#findComment-79204 Share on other sites More sharing options...
1958 F.W.D. Posted June 6, 2011 Share Posted June 6, 2011 My Type 75A fire truck is equipped with a disc type of parking brake. The pads are "chattering" against the disc when I let off of the power. My Mack manual does not cover this type of brake so I was wondering if anyone has any advice on how to adjust the brake to take the play out of the pad assemblies.I have the same type of set up on my F.W.D. pumper. I'll have to crawl under there and study it for a while, maybe I can lend some advice. (oh that is scary.....) Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/19311-disc-type-parking-brake-adjustment-on-an-a-model/#findComment-79224 Share on other sites More sharing options...
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