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Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 11:03 am
by pistolpete
Guys,

Like I mentioned in previous posts. This dis-assembly method is only one idea and I also know that whatever works for you is for you to determine.
The needle shaft is tapered and therefore twisting works for me, however I will say that I have broken a fingernail or two in removal of some.

Pete

I will be posting assembly suggestions later today.

Bob, to answer your question I have speedo/tacho faceplates for the 75 and repairs for 76 & 77. Just email me and we can see if you would like to have a set.

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 12:09 pm
by pistolpete
Continuing;
Here are the tools required.

Shown are items 30 and 31 are the Wiss Hand Seamers that can be purchased at Home Depot.
I prefer these because they have jaws that are parallel when partially opened. Just about the correct thickness of the crimp ring when fully closed.

Item 32 is a set of channel lock style pliers.

You will also need 2 C clamps at least 4" open. [Not shown]

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 1:56 pm
by pistolpete
Locate a piece of wood approx. 3/4" thk x 2.5 to 3" wide x 12 to 14" long.

Clamp it to the table with a 4" clamp.

Invert the loosely assembled gauge (speedo/Tacho) with a rag or towel between the board and gauge.
Clamp the assembly to the board with enough pressure to reseal the center crimp seal. Caution: It is possible to overtighten and damage the inst. base or crack the glass.

See pic 33

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 2:14 pm
by pistolpete
In pic 34 the pliers are used to carefully hold the crimp ring to the flange of the bezel to hold all in place.

Use the seamers to make a partial crimp of the ring to the instrument.
I cannot emphasize enough to be careful and use partial crimps with the seamers.
It is also easier to roll up the seamers as force is applied. (See pic 35)
Note the partial crimp just above and to the left of the W in Wiss.

Note: A sacrificial gauge may be a prudent investment. With some practice it gets simpler and easier.

Do this procedure at lease three to four places at 120 degrees/90 degrees as chosen.
You might find it easier and more prudent to make small crimps to assure the ring is even all around.

Note: It is a good idea to use the pliers each and every time you make a crimp.

Thank you all for looking.
Pete

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 2:42 pm
by Recycled Roadkill
Very interesting tools and techniques you've used, Pete and well worth trying for me. I'll leave a post of how badly I've messed up when I open and attempt to clean my speedometer.
Also, I feel quite fortunate to own all the tools you've specified for this. I would have never thought of using seemers with this application.
I suspect the worst I'll be dealing with is my lack of patience for such work.
Thank you Pete!

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 3:07 pm
by joedrum
this was good I let it go awhile before looking ...nice job and process ...sure take some wonder how...off the table ..

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 7:10 pm
by pistolpete
You all are very welcome.
I hope that "self doers" like it enough to try it.

Pete

Re: With interest, I will explain a good way to open GL gaug

Posted: Thu Jul 18, 2013 7:57 pm
by Neil
After watching this, all I can say .... I'm glad the gauges on my 82 are working fine. Very nice presentation even if I'll never use it.

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 10:59 am
by pistolpete
Thanx Neil

We appreciate your comment.

Pete

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 2:56 pm
by Recycled Roadkill
Using Pistol Petes methods with little variation I successfully took apart the '77 speedometer and more importantly got it back together. The black on white numerals for 10ths of a mile on the trip odometer and speedometer were replaced with dials from my sacrificial '78 speedo. While not perfect I'm very happy with the results. Thank you Pistol Pete!
redone_speedo.JPG
redone_speedo.JPG (123.92 KiB) Viewed 334 times

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 4:34 pm
by pistolpete
Thanks Bob,

For those who have a comment we would ask that you leave one so that the thread will refresh often.

Thanx
Pete

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 5:03 pm
by bob
Pete,

Thank you very much for taking the time and the willingness to share this information. Very helpful.

Which brings me to my question. Both gauges are shot. This was a new to me bike 2 yrs ago, and hadn't been ridden much. They started screaming 60 miles into a trip, and had to be disconnected. To make a long story short, I bought a used set of gauges, same year (82) on eBay. They look pretty good, but I want to avoid this problem. Is there a procedure to get some lube in there, or should they be disassembled, cleaned and lubed? Are you still doing these repairs?

Thanks,

Bob

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 5:41 pm
by pistolpete
Hello Bob,

The gauges scream because the lubrication has gone from the cable neck bearing. Buy some glycerin grease in a small tube with a pin tube.
You can squeeze 4 or 5 drops in the outer side of the cable drive. (don't put grease inside the square drive hole)

If the bearings are badly worn it will start the needle jumping. This is not good and will require another movement.

Re: With interest, I will explain a good way to open GL gaug

Posted: Fri Jul 19, 2013 11:37 pm
by bob
Thanks Pete...but I need some help here. The term glycerine grease is new to me. What else does it go by?

Re: With interest, I will explain a good way to open GL gaug

Posted: Sat Jul 20, 2013 9:30 am
by pistolpete
Glycerin grease (oil) is the substance inside the Speedo/Tacho dash pot. It is very viscous (sticky) and it is the material that gets between the speed bell and the stabilizer and causes a slow gauge needle.

It is available from Amazon.