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Astrodome speedo makes grinding sound...
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FourFans
Posted 2017-03-16 10:07 AM (#536050)
Subject: Astrodome speedo makes grinding sound...



Regular

Posts: 54
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So, when I bought the car, the speedo cable was disconnected. The cable is good and turns like it should. I reconnected the cable and the speedo needle didn't move, but the whole dome vibrated slightly and made a slight grinding noise at 5-10mph. Anybody have any ideas? Any advice on pulling the dome?

I do have a good speedometer service shop nearby if I can pull the unit.

While I am under there I am hoping to service the heater servos, vac lines, switches, etc.

 

Thansks!

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wizard
Posted 2017-03-16 11:17 AM (#536052 - in reply to #536050)
Subject: Re: Astrodome speedo makes grinding sound...



Board Moderator & Exner Expert 10K+

Posts: 10810
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Location: Southern Sweden - Sturkö island
The problem is most probably the oiling wick - the oiling wick is in a very unservicable position and I doubt that any of the speedometers got any service during the years.

You can unscrew the cap and see if your lucky enough that the wick follows out with the cap. Most probably the wick is hardened by old oil and needs to be pryed out with a small pin.

It's better to pull the complete speedometer, but it's a lot of work;

- Start with removing the steering wheel
- Remove the chromed ribbed bezel between the steering wheel and the AstraDome
- Now loosen the four nuts that holds the chromed crescent with the four switches – note, just loosen them somewhat
- Remove the two nuts that holds the brushed aluminum crescent cover (around the AstraDome)
- Remove the two Philips screws under the chromed crescent with the four switches
- Remove all the contacts from the gauges
- Remove the speedometer cable, the indicators and high beam lamp holders
- Remove the 4 screws that holds the globe to the speedometer
- Now carefully lift out the globe with the gauge clusters
- Remove the 4 screws that holds the speedometer to the dash panel
- Lift out the speedometer.

Once that you have the speedometer out, you could try to work it free with an electric drill/driver and a square bit - carefully turning left and right with the torque set very low. Use sewing machine oil and wash out the old oil with new.

Then, of course, if you have a speedo-shop close by, that would be the best option. They can check and repair it for you.

At the same time, check all EL-lamps so that you could repair them as well when the AstraDome is out.

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=23457&... is electro&highlightmode=1#M497209
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FourFans
Posted 2017-03-16 12:14 PM (#536057 - in reply to #536050)
Subject: Re: Astrodome speedo makes grinding sound...



Regular

Posts: 54
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Thanks! Where is the cap to unscrew for the wick? I am assuming under the dash in the rear of the speedo?
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wizard
Posted 2017-03-16 12:39 PM (#536060 - in reply to #536050)
Subject: Re: Astrodome speedo makes grinding sound...



Board Moderator & Exner Expert 10K+

Posts: 10810
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Location: Southern Sweden - Sturkö island
Yes, if you remove the speedo cable you'll see it better.
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59 in Calif
Posted 2017-03-16 6:54 PM (#536078 - in reply to #536050)
Subject: Re: Astrodome speedo makes grinding sound...


Elite Veteran

Posts: 931
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Location: Hayward, Calif
I've found lubing the speedo cable as the 1st thing to do. I usually use white grease generously as I'm feeding the cable back into the housing. I have found this to cure a lot of noisy speedo's and it's the easiest thing to do. If this doesn't cure the noise, then go on to the speedo head. Jerry
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FourFans
Posted 2017-03-16 7:00 PM (#536079 - in reply to #536078)
Subject: Re: Astrodome speedo makes grinding sound...



Regular

Posts: 54
2525
59 in Calif - 2017-03-16 4:54 PM

I've found lubing the speedo cable as the 1st thing to do. I usually use white grease generously as I'm feeding the cable back into the housing. I have found this to cure a lot of noisy speedo's and it's the easiest thing to do. If this doesn't cure the noise, then go on to the speedo head. Jerry


Thanks. Speedo cable is good to go.
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