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#1
03-01-2007, 04:38 PM
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Front brake drum broke
Two college girls in a tercel pulled out in front of my wagon last night. Caused a little scratch on the front bumper rubber strip. Nothing big.
But when I slammed on the brakes to avoid hitting them the brakes locked and I heard something break from the front driver's wheel well. Turns out my brake drum broke. The plane of the rotor separated from the cylinder that has the lug bolts fit through. So now the rotor turns at will and makes rubbing sounds when driving - the sounds stop when I hit the brakes since its pressing the rotor enough to stop it. Seems scary it would break like this. Has anyone else ever had a brake drum break like this?
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JWJ 1983 MB 300D - > 430,000 miles - Deep Blue - Bilstein Comforts - 0-60 in 24 seconds - 27MPG 1985 MB 300TD (wagon) - > 275,000 miles - Manila Beige - Thule rack - 0-60 in 18 seconds - 22 - 25MPG Biodiesel, Mobil Delvac 1, and Viton fuel lines! 
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#2
03-01-2007, 04:49 PM
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I'm not sure I follow. Do you mean the rotor seperated itself from the hub? In that case:
 Never mind. I understand what happened now.    
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1989 300E 144K
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#3
03-01-2007, 04:50 PM
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have you ever had the discs turned ? Its a fairly quick fix to replace a rotor. I hope your still not driving it. Chinese rotors?
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'83 240D 264k  on 100% biodiesel/ 31mpg 83 300D 217K  the $800 gem '82 300D 267K the new WVO project car  finished and driving for free International tractor B275 on B100 Ford 555 backhoe on B100 Sargent 25 ton Rough Terrain crane on B50  
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#4
03-01-2007, 05:18 PM
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Yes, it is an easy fix and MB rotors are cheap.
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#5
03-01-2007, 05:51 PM
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Rotor...no crummy drum brakes on your benz.
Well I guess the parking brake is kind of a drum...none on the front anyway.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver 1982 300SD - 232K miles - Wife's Daily Driver 1986 560SL - Wife's red speed machine
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#6
03-01-2007, 06:10 PM
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I had a wheel bearing fail at interstate speeds. Symptoms similar to what you are describing. Not pretty. $1100 fix. Turns out I could have done the work myself. Now I know. You should inspect everything up front. I understand these rotors should NOT be turned, as that will result in too thin a surface, and the calipers might push all the way out = no brakes. The only drums are parking brakes located inside of rear hubs.
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83 SD 84 CD
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#7
03-01-2007, 06:37 PM
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Brought a 123 once with a separated rotor disk from what looks like a hat. It is of course the hub portion. If you examine it once you get the parts off you will see it was very thin where it breaks out. Rust contributes to some extent but the design is thin there anyways. I also suspect it is not all that uncommon a failure.
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#8
03-01-2007, 06:45 PM
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I was just thinking... I've actually seen to cars at pullapart where the pads were cambered so greately that they ate right thru the disc at the hub...... Probably a good sign that the owner drove it until things broke......
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42
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#9
03-01-2007, 06:54 PM
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i had one break away at that point because i engaged in some overly creative thinking and installed the rotor with only three allen screws.
it came home on the wrecker. fortunately happened at low speed and nothing was damaged except the rotor. i doubt one would break unless worn very thin. as noted above dont drive it that way. very unsafe. tom w
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#10
03-01-2007, 07:26 PM
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Yes
Quote:
Have a great day.
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#11
03-01-2007, 11:08 PM
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Quote:
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#12
03-02-2007, 11:46 AM
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Quote:
__________________
'83 240D 264k on 100% biodiesel/ 31mpg 83 300D 217K the $800 gem '82 300D 267K the new WVO project car finished and driving for free International tractor B275 on B100 Ford 555 backhoe on B100 Sargent 25 ton Rough Terrain crane on B50
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#13
03-02-2007, 03:02 PM
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Quote:
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#14
03-02-2007, 03:52 PM
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Front Drum????
Aren't the fronts discs - not drum???
__________________
the sooner you start... the sooner you'll get done  If it ain't broke, don't fix it.. Its always simpler to tell the truth...2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa
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#15
03-02-2007, 04:15 PM
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Quote:
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