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propguy Samba Member
Joined: September 10, 2004 Posts: 86 Location: Madison, WI
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Posted: Sun Apr 14, 2013 6:21 am Post subject: |
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OK,
So I got my speedo apart- Thanks Andy for the step by step. Unfortunately I scratched the face. I am pretty sure that there isn't any way to fix that nicely. Any thoughts?
Thanks |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Tue Apr 09, 2013 2:45 pm Post subject: |
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Thank you for that unintentional slap in the face, Andy. Of course, I didn't think that there's no direct connection between the odometer and speedometer, so just forget my lapse in intelligence there. I should've spent less time staring at face plates and more thinking about the mechanics of it all.
I'm still just a bit confused in general though how and why the only place speeds match up between the two is at the 90mph mark... Maybe it's beyond me to understand how any variation in spring tension or variation in the magnet can have the effect where from 0-89mph there is no commonality. _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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glutamodo The Android
Joined: July 13, 2004 Posts: 26306 Location: Douglas, WY
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Posted: Tue Apr 09, 2013 10:53 am Post subject: |
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The odometer is a direct count of rotations of the speedometer cable. The W0.80 is a description of that gear ratio. This implies a certain diameter tire of course, in order for that ratio to be valid. But no matter what, it's directly coupled, a physical counter
The speedometer is not directly coupled at all. It's a magnet and a cup that do not touch each other. Of course, tire size matters here too, but since nothing touches, it does not "count up" in any way - the tension of the spring around the needle determines how resistant the needle is to the motion of the speedometer cable.
You can have a speedometer that the needle position has been changed, the spring has been messed with, or a spring that has "gone flat" over time, or has developed some other extra resistance to rotation, that will read off. If the bushings around the magnetic cup wear and there is a bit of wobble, then the magnet and cup can get too close and then your speed may vary, bounce or just read higher than it should. But through all of those scenarios, the odometer will still plug away, still counting actual rotations of the cable. (assuming the gears are in good shape)
I assume that on those different year speedometers you are comparing they have slightly different amounts of tension applied by the "brake" spring, as VW called it.
Now, you can use that W (or faceplate) number to "calculate" the tire diameter the odometer is keyed to. However, that calculated diameter is still a little lower than the actual tire diameter needed for it to be accurate. I drew this up a couple of years ago:
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Tue Apr 09, 2013 7:19 am Post subject: |
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glutamodo wrote: |
The W0.80 refers to the odometer gearing... |
Interesting, but still odd. Both are using the same odometer gearing but don't match speeds at the same points on the speedometer face. About the only place they match up is at the 90mph point, even the stop pins are located in a different place on the faces. I find it difficult to understand how odometers can match if speeds don't. Do you think a simple matter of a slight adjustment to the spring pre-tension would account for that and make up for it? _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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reded68 Samba Member
Joined: April 12, 2012 Posts: 238 Location: New Zealand
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glutamodo The Android
Joined: July 13, 2004 Posts: 26306 Location: Douglas, WY
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Posted: Mon Apr 08, 2013 7:55 pm Post subject: |
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The W0.80 refers to the odometer gearing... |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Mon Apr 08, 2013 7:06 pm Post subject: |
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An observation regarding calibration:
Early and late model speedometers with the W0.80 calibration mark are comparable, but I noted that the MPH numbers are not in the same locations on the face between early and late models. I find that odd. _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Fri Apr 05, 2013 10:53 am Post subject: |
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beryl green'62bug wrote: |
The guy that invented the fork idea goes by johnshenry on TheSamba site here.He knows his stuff.I was looking for the thread on how he uses the fork tool but gave up .So you had some luck with getting the needle off ? |
Yeah. Before making a trip out to a thrift store, I gave the diagonal pliers another try, with a different spin/angle on it. That allowed the application of a little more elbow grease, and pop! there it flew! _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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thomas. Samba Member
Joined: July 31, 2010 Posts: 1290 Location: South West (Pa.)
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Posted: Fri Apr 05, 2013 6:28 am Post subject: |
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The guy that invented the fork idea goes by johnshenry on TheSamba site here.He knows his stuff.I was looking for the thread on how he uses the fork tool but gave up .So you had some luck with getting the needle off ? |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Thu Apr 04, 2013 6:05 pm Post subject: |
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Ok, mission accomplished, but I'm still going to make some bushing tools for next time.
There's always a next time. _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Thu Apr 04, 2013 9:59 am Post subject: |
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That looks doable and easy to make. I might need to run over to a local thrift store to pick up a couple spoons and a fork to play with.
I wonder how the fork maintains its shape. Silverware is pretty easy to bend and I can't see it holding that form while using it to pry the bushing off. Since I don't have much for options left, I'll happily give it a try.
Thanks! _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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thomas. Samba Member
Joined: July 31, 2010 Posts: 1290 Location: South West (Pa.)
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Posted: Thu Apr 04, 2013 7:35 am Post subject: |
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This fork tool supposedly works good .Its from a thread on that subject on this site but I can't find it.I think you lay the wood piece over the diameter face of the speedometer for leverage then yank the needle out with the fork.
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Wed Apr 03, 2013 7:18 pm Post subject: |
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glutamodo wrote: |
Those pencil torches can put out a pretty tiny flame, but yeah I see your concern. |
I'll think it over should the spoons and ice fail me, thanks. I didn't expect this considering the ease of removing the last one I did. _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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glutamodo The Android
Joined: July 13, 2004 Posts: 26306 Location: Douglas, WY
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Posted: Wed Apr 03, 2013 7:10 pm Post subject: |
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Those pencil torches can put out a pretty tiny flame, but yeah I see your concern. |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Wed Apr 03, 2013 7:03 pm Post subject: |
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glutamodo wrote: |
I think it was Bill May that says he likes to use a couple of spoons as levers...
Maybe one of those cheap butane pencil torches for a better heat source on it. |
I remember the spoon thing and I'll give that a shot. I'm hesitant to use a flame of any sort so close to the painted face, you know? _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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glutamodo The Android
Joined: July 13, 2004 Posts: 26306 Location: Douglas, WY
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Posted: Wed Apr 03, 2013 7:00 pm Post subject: |
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I think it was Bill May that says he likes to use a couple of spoons as levers...
Maybe one of those cheap butane pencil torches for a better heat source on it. |
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'69Custom Samba Member
Joined: September 16, 2008 Posts: 2497 Location: Ventura, California
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Posted: Wed Apr 03, 2013 4:46 pm Post subject: |
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Complication:
I'm having issues removing the brass spline bushing for the needle. I tried the traditional method with diagonal pliers, I've tried pulling it straight with slip joint pliers, I've soaked both ends of the bushing for days in penetrating oil, tried holding the shaft stationary while twisting the bushing free, and I've applied heat to it via soldering iron.
It doesn't want to come off, for the love of God!!!!
Aside from ice, which will be my next probable attempt, anyone have another suggestion? _________________ -Tim
1969 Frankenbug
1965 Ford Mustang
:2gunfire: F-U-M-P!
~"I thought I was wrong once, but I was mistaken." ~The Boss
Please excuse any typos as my iPhone doesn't speak English very well.
tham64 wrote: |
Why tune a big round again and again????? For me.... 1 hour will solve the case |
www.endlesscustomz.com |
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dschup Samba Member
Joined: July 17, 2008 Posts: 299 Location: Kyle, TX
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Posted: Thu Feb 28, 2013 7:53 am Post subject: |
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Just do this, sword drink stirrer from walmart, 97 cents for a pack of twenty.
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skapunkfoo Samba Member
Joined: November 02, 2012 Posts: 150 Location: Wherever the Army sends me.
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Posted: Wed Feb 27, 2013 8:04 pm Post subject: |
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stirring up an old thread I know. Thanks to this I just re-set my speedo to 00001, thanks.
But before I even took it apart the needle broke. I also discovered that it was broken and glued once before. Its in three pieces now and I need a new needle. No ones selling them on here or on craigslist. Anyone want to sell me one or know of someone who does. I may even stop by a scrap yard this weekend to see if I can get one but if not, who here has one? |
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Brassneck Samba Member
Joined: November 17, 2012 Posts: 420 Location: Seattle
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Posted: Fri Dec 21, 2012 2:15 pm Post subject: Speedo replaced |
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A quick update and a Thank YOU to this group/thread...
I picked up a spare speedo yesterday from a member on Samba! So great to have local contacts... With it, I was able to get the gist of how the bulbs, etc. come out, and while the spare speedo didn't look too good (some water/rust stains inside the glass, on the white ring, etc)... It looked to be in decent working order.
So using it as practice, (And with the solid advice on this thread...and a little patience)... I was able to get the bezel off and the speedo apart. I cleaned up the glass, outer ring, and the white ring so it looked pretty good. I had decided once it looked half-way decent to simply use it to replace my current speedo (That's been jammed and no longer works). Plugged in the lights, and presto...everything works perfect!
Next up was to take my current (jammed up) speedo...and now having practiced once before... I was able to do this process a lot easier... off with the bezel, cleaned up the glass, and got to see what was causing my "jammed gears". Turns out, they weren't cracked or broken...just gummed up stiff. A little liquid wrench got them freed, added some white Lithium in select spots... and re-assembled the unit. Now it works like a charm!
An interesting note on removing the unit from the car... I didn't realize I needed to drop the steering column to get the speedo out as I needed about an inch more clearance than I had with the column in...but fortunately this was very easy to do.
Thanks for everyone's help, and Happy Holidays! |
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