Re: [MBZ] 190DT Brakes
Fred, I've been thinking about this. Did you check the width of the brake lining against the width of the brake drum? I just did the emergency brakes on 123 a while ago and can remember that the linings there were about 1/8 to 3/16 narrower. Check to make sure that the shoes are resting all the way on the backing plate. I seem to remember a time long ago with regular shoe brakes that I had a similar problem due to being sent the wrong brake cylinder for a VW. Looked to be the same physical size but stood higher off the backing plate so the shoes didn't line up right and ended up dragging on the drum. didn't find it till we took the new cyl out and rebuilt the old one and put it in. It won't of course be the cyl here since there isn't one but still maybe something is holding the shoe too high. Manfred Date: Sun, 28 Jun 2009 12:29:13 -0400 From: Frederick W Moir fred.s...@verizon.net Subject: Re: [MBZ] 190DT Brakes To: Curt Raymond curtlud...@yahoo.com Cc: Mercedes mercedes@okiebenz.com Message-ID: 0kly00e3uj4r7...@vms173001.mailsrvcs.net Content-Type: text/plain; charset=us-ascii; format=flowed Hi, Curt. Wonky heater was lack of adequate vacuum at the water valve. Leaky EGR diaphragm responded to leak repair a la BB. Not rebuilt but deferred maintenance by P.O. I must be too close to it to see what the problem is. Whilst banging on the brakes, I used the drive shaft to turn the wheels, and discovered where the slight shimmy at 80 was coming from, dead and ugly drive joints plus a completely rotted center joint! One boat payment later, and the necessary parts arrived from Rusty and viola! new drive assembly with dragging brakes. After chamfering the outer edges of the shoes, it works OK. Why? Damnfino! Any germane ideas welcome. Fred Moir Lynn MA Diesel preferred ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 190DT Brakes
Manfred. The new shoes and the metal remains of the old were the same width. The new rear disc/drum ( Ex Bent) were, as near as I could judge, equal to the old and crusty ones. The new shoes fit snugly against the backing plates, rusty though they are. My only area of concern is the drum part itself. There is a step inside between where the shoe sits and where it mates to the hub and IF it were not cut back far enough during manufacture it would cause the slight interference that was relieved by chamfering the shoes edges. I put the old disc/drum back onto Bent and they were fine. Still crazy after all this time Thanks TTFN Fred Moir Lynn MA Diesel preferred 85 300TD 87 190DT Bent 87 190DT Blue At 07:35 AM 6/29/2009, you wrote: Fred, I've been thinking about this. Did you check the width of the brake lining against the width of the brake drum? I just did the emergency brakes on 123 a while ago and can remember that the linings there were about 1/8 to 3/16 narrower. Check to make sure that the shoes are resting all the way on the backing plate. I seem to remember a time long ago with regular shoe brakes that I had a similar problem due to being sent the wrong brake cylinder for a VW. Looked to be the same physical size but stood higher off the backing plate so the shoes didn't line up right and ended up dragging on the drum. didn't find it till we took the new cyl out and rebuilt the old one and put it in. It won't of course be the cyl here since there isn't one but still maybe something is holding the shoe too high. Manfred ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 190DT Brakes
Sounds like that little step may be the problem then. Too bad you don't have a brake drum lathe. That would solve the problem right quick. Course you could always weld some washers between the disk and the axle so the disk rides farther out. But then you have to do the same with the caliper...Nah never mind too much work. Just joking you know. Manfred Date: Mon, 29 Jun 2009 10:13:14 -0400 From: Frederick W Moir fred.s...@verizon.net Subject: Re: [MBZ] 190DT Brakes Manfred. The new shoes and the metal remains of the old were the same width. The new rear disc/drum ( Ex Bent) were, as near as I could judge, equal to the old and crusty ones. The new shoes fit snugly against the backing plates, rusty though they are. My only area of concern is the drum part itself. There is a step inside between where the shoe sits and where it mates to the hub and IF it were not cut back far enough during manufacture it would cause the slight interference that was relieved by chamfering the shoes edges. I put the old disc/drum back onto Bent and they were fine. Still crazy after all this time Thanks TTFN Fred Moir Lynn MA Diesel preferred ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 190DT Brakes
Hi, Curt. Wonky heater was lack of adequate vacuum at the water valve. Leaky EGR diaphragm responded to leak repair a la BB. Not rebuilt but deferred maintenance by P.O. I must be too close to it to see what the problem is. Whilst banging on the brakes, I used the drive shaft to turn the wheels, and discovered where the slight shimmy at 80 was coming from, dead and ugly drive joints plus a completely rotted center joint! One boat payment later, and the necessary parts arrived from Rusty and viola! new drive assembly with dragging brakes. After chamfering the outer edges of the shoes, it works OK. Why? Damnfino! Any germane ideas welcome. Fred Moir Lynn MA Diesel preferred At 08:54 PM 6/27/2009, you wrote: Wow, won't be long until you've totally rebuilt that car huh? Did you ever figure out your wonky heater? The rear end on my 190D just absolutely howls. It sounds like I'm driving an old bus. I found a local Indy (just down the street actually) that thinks they might be able to properly set up a rear diff. They say they do a lot of 4x4 trucks with new ratios and whatnot. I need to look and see if theres a proceedure in the manual, I could print that and take it to them... -Curt ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 190DT Brakes
I was going to suggest that maybe the 190D-T had special brakes but having them be SMALLER doesn't make any sense at all... I'd guess its either a manufacturing defect (and not an important one at that) on the brake shoes or a poor design of same... -Curt --- On Sun, 6/28/09, Frederick W Moir fred.s...@verizon.net wrote: From: Frederick W Moir fred.s...@verizon.net Subject: RE: [MBZ] 190DT Brakes To: Curt Raymond curtlud...@yahoo.com Cc: Mercedes mercedes@okiebenz.com Date: Sunday, June 28, 2009, 12:29 PM Hi, Curt. Wonky heater was lack of adequate vacuum at the water valve. Leaky EGR diaphragm responded to leak repair a la BB. Not rebuilt but deferred maintenance by P.O. I must be too close to it to see what the problem is. Whilst banging on the brakes, I used the drive shaft to turn the wheels, and discovered where the slight shimmy at 80 was coming from, dead and ugly drive joints plus a completely rotted center joint! One boat payment later, and the necessary parts arrived from Rusty and viola! new drive assembly with dragging brakes. After chamfering the outer edges of the shoes, it works OK. Why? Damnfino! Any germane ideas welcome. Fred Moir Lynn MA Diesel preferred At 08:54 PM 6/27/2009, you wrote: Wow, won't be long until you've totally rebuilt that car huh? Did you ever figure out your wonky heater? The rear end on my 190D just absolutely howls. It sounds like I'm driving an old bus. I found a local Indy (just down the street actually) that thinks they might be able to properly set up a rear diff. They say they do a lot of 4x4 trucks with new ratios and whatnot. I need to look and see if theres a proceedure in the manual, I could print that and take it to them... -Curt -- next part -- An HTML attachment was scrubbed... URL: http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090628/3e497fcd/attachment.html ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] 190DT Brakes
Hi, All. Quick question. Rebuilt the rear brakes on the 190DT (parts from Rusty of course). All went well until it came to putting the discs back on. The new shoes for the Emergency/parking/hand brakes seemed to be about 0.01 too wide, causing the wheel to jam. I chamfered the outer edges and all seems well. Yes, I did triple check everything, including printing out the relevant EPC pages and FSM pages, half hour stare and compare did not show any discrepancy. 1. Shoes too wide? 2. Drum not cut back quite enough? 3. WTF? Fred Moir Lynn MA Diesel preferred. p.s. The old shoes were missing the linings, dust and debris only. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
