Author Topic: Odometer Question  (Read 1574 times)

Harry

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Odometer Question
« on: January 25, 2022, 00:14:32 »
Mine is a 1966 230SL Automatic.  My odometer stopped working within the past year or so.  The speedometer continued to work, just not the odometer.  I found the reason this evening.   There is a worm gear that drives a shaft that turns the odometer.  The worm is held in place by a small brass fitting, with a small brass washer.

The fitting had come free and was rolling around in the speedometer housing itself.  Unfortunately without this fitting, the drive gear forces the worm gear outward, disengaging completely.

So I need to determine how this small brass fitting is secured into the cast aluminum frame of the speedometer.  Photos are provided to make this more clear.  Was this initially a press fit?  Have other suffered the same issue?

Thanks,
Harry
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

Harry

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Re: Odometer Question
« Reply #1 on: January 25, 2022, 23:47:30 »
No feedback?
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

ja17

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Re: Odometer Question
« Reply #2 on: January 26, 2022, 06:53:42 »
I'm fairly sure it was a press fit.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Harry

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Re: Odometer Question
« Reply #3 on: January 26, 2022, 12:57:38 »
Thanks Joe.  I figured the same thing.  I haven't tried to reassemble but I will this evening.  If it feels like it might crawl right back out, I may prep and very carefully epoxy or something.
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

ja17

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Re: Odometer Question
« Reply #4 on: January 26, 2022, 15:56:52 »
Maybe Loctite?
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Harry

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Re: Odometer Question
« Reply #5 on: January 26, 2022, 17:03:03 »
Yeah - probably even better.  I thought that Loctite was just a thread sealant though and didn't realize it might also be a bonding agent.
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

Harry

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Re: Odometer Question
« Reply #6 on: January 29, 2022, 15:33:58 »
In follow-up, replacing that brass keeper corrected the odometer problem.  It did appear to be a press fit - guess it just worked itself free after 50+ years.  I cleaned it, applied a bit of loktite (not a lot), the tapped it back into position.  I was happy that it took some pretty firm "tapping" to reseat it.  I also used a toothpick to add some light weight lithium grrease to the metal gears.  I did not lubricate the plastic gears.  They didn't appear to have ever had any lubricant and I was worried a bit that a grease might deteriorate the old plastic.

Thanks again for the assistance.
Harry
Harry Bailey
Knoxville, TN
1966 230SL
Automatic

Pinder

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Re: Odometer Question
« Reply #7 on: January 30, 2022, 00:52:26 »
I may have the same problem. My speedo works but the odometer stopped working few weeks ago.
1970 280 SL Light Ivory DB 670. 4 Speed manual shift no AC Limited Slip Diff.

Benz Dr.

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Re: Odometer Question
« Reply #8 on: January 30, 2022, 08:12:45 »
The shaft that turns all of the gears can come loose as well. Same problem with different parts involved.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

Harry

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Re: Odometer Question
« Reply #9 on: February 03, 2022, 10:52:13 »
Thanks Dan.  I will indeed check everything before I reinstall, considering the difficulty to remove.
Harry Bailey
Knoxville, TN
1966 230SL
Automatic