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  #1  
Old 12-26-2009, 04:52 PM
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300SD Instrument Cluster Odometer Sprockets

Anyone know where to find replacement odometer sprockets for an instrument cluster on a '83 300SD? -am emailing Phil now...

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  #2  
Old 12-26-2009, 06:25 PM
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1-800-444-0292 speedometer.com ask for Rick
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  #3  
Old 12-26-2009, 07:01 PM
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Thanks

I emailed him and will call him Monday if I don't hear back from him. I was quoted $500+ to repair, so I pulled the cluster myself and the problem was obvious. Thanks again...jim
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Old 12-26-2009, 07:25 PM
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Is it stripped or is it just loose? Dieselgiant has details on how to fix if it's loose.
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Old 12-26-2009, 07:46 PM
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I've bought replacement gears for the SD odometer from here - http://www.odometergears.com/mercedes.html
They worked great.
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  #6  
Old 12-26-2009, 08:27 PM
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Thumbs up Answer

Quote:
Originally Posted by jbritt1084 View Post
Anyone know where to find replacement odometer sprockets for an instrument cluster on a '83 300SD? -am emailing Phil now...
Instrument cluster, Odometer, Speedometer, Tachometer links
Instrument cluster, Odometer, Speedometer, Tachometer links
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  #7  
Old 12-26-2009, 08:50 PM
Bryan Automotive
 
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Ship off to Rick at Overseas Speedometer. He should charge you $125 to change all the gears out and clean the trip odometer. Well worth the service. I have been using him for 15 years. I have tried to to do the service myself according do the DIY and have found it much easier to send it off.
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  #8  
Old 12-26-2009, 10:57 PM
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Two of the plastic sprockets, the small one on the end of the top spindle and the larger one it rotates, fell apart when I touched them. The other two seem to be in good shape, but I will go ahead and replace them while I have it out.
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  #9  
Old 12-27-2009, 12:51 AM
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Quote:
Originally Posted by Biodiesel300TD View Post
I've bought replacement gears for the SD odometer from here - http://www.odometergears.com/mercedes.html
They worked great.
I have used two sets from them. They ship fast and will answer your questions. The only complaint I have is that I can hear the gears turning at speeds below 45 mph. They told me to put grease on the first two gears to stop the noise.
Robert

About $65 for a complete set for the 126 and an easy job to do.

Last edited by LuckyEddie; 12-27-2009 at 12:56 AM.
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  #10  
Old 12-27-2009, 01:47 PM
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Fixed mine myself,3 bad gears $45. car radio . com
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  #11  
Old 12-30-2009, 07:05 PM
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Replaced Gears/Now Click, Click, Click Down the Road

-received my gears today from the guys in Newport News...the odometer is now working, but there is the VERY audible click, click, click, of the gears as I ride down the road. I blew out all dust/debris with my air compressor/hose and used the same lube oil on them that I use on my son's Lionel train, as they are similarly delicate. Does anyone have any other suggestions for getting rid of the noise? Thanks...
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  #12  
Old 12-30-2009, 07:08 PM
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exact same thing happened to me when replaced gears on my 560SEL. i messaged the guys at odometer gears and they said to put a thin layer of axle grease on e2 gear. what is axle grease? does it have any special properties?
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  #13  
Old 12-30-2009, 07:18 PM
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It has the consistency of petroleum jelly for lack of a better comparison. I guess it holds up/stays in the teeth and acts as a buffer between the teeth. Any other explanation is welcome.
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  #14  
Old 12-30-2009, 09:56 PM
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Wink

there is back lash in the gear set. IE a lot of clearance or just a sloppy gear set. MB gets around the noise by using rubber gears that fail after time. The heavy grease is to silence the slap from the drive motor on the other end of the small gear shaft. The delrin gears are hard and make noise but will last forever.

The 126 speedometer is driven by a pulse generator on the output shaft of the transmission. The speedometer translates these pulses into "steps" on the speedometer drive in the head. It is sort of a coging effect till the speed gets up and it is not a bother (45+) This is also why we have helical gears in the rear end and not straight cut gears (noisy).

Enjoy
Robert
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  #15  
Old 12-30-2009, 09:57 PM
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Axle grease AKA wheel bearing grease. Thick, non-slinging, and compatible with the plastics in there. Use the black moly-graphite stuff if you never want to deal with it again.

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