Author Topic: tachometer just stopped working.  (Read 3770 times)

Michaelg

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tachometer just stopped working.
« on: December 18, 2015, 22:41:00 »
Before i start pulling stuff apart, my tach stopped working. What would anybody sudgest for trouble shooting before i pull the tach out to be tested?? Where do i start and finish to pin point the problem.
cheers.

Benz Dr.

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Re: tachometer just stopped working.
« Reply #1 on: December 18, 2015, 22:50:50 »
Broken cable?
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

Michaelg

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Re: tachometer just stopped working.
« Reply #2 on: December 18, 2015, 23:11:51 »
wow. its machanical?
i may as well start their.
New car for me. been my dads for years. i have a lot to learn!!

ejboyd5

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Re: tachometer just stopped working.
« Reply #3 on: December 18, 2015, 23:41:00 »
Check that both ends of the tachometer cable are still firmly attached as it is possible for the collar to loosen thereby allowing the inner flexible shaft to slip from its driven position.  Did the tachometer make any strange noises just before it stopped working?  Did the indicator needle perform any wild gyrations before quiting? 

Michaelg

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Re: tachometer just stopped working.
« Reply #4 on: December 19, 2015, 13:42:09 »
i am not sure i was just given the car by my 90 year old dad.
so i did not see that the tach was broken.

ja17

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Re: tachometer just stopped working.
« Reply #5 on: December 19, 2015, 15:10:13 »
What a great gift! Welcome to the world of Pagoda. The tachometer cable is attached to the engine, near and below #1 spark plug. You might want to unfasten it first here, You may be able to see if the cable is intact.
« Last Edit: December 19, 2015, 15:14:43 by ja17 »
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

glenn

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Re: tachometer just stopped working.
« Reply #6 on: December 28, 2015, 01:42:16 »
Hi, Just had the bushing/bearing at the odometer in the instrument panel freeze up.  A little lube and turning freed it up. 

Tyler S

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Re: tachometer just stopped working.
« Reply #7 on: January 02, 2016, 05:09:25 »
The original tach cables have a rubber angle in them right where it connects to the tachometer itself. Mine had deteriorated and fallen apart letting the cable sheath pull away from the tach and take the inner cable along with it.
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
2019 E450 Wagon. Majestic Blue
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