31/32 measurement

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papanhead49
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31/32 measurement

#1

Post by papanhead49 » Sun Apr 24, 2011 3:28 pm

Doing some adjusting on the clutch on my 49 fl panhead. I'm a little confused on where to measure the spring tension dem. of 31/32. Is it photo 1 or photo 2

photo1
Image


photo2
Image

or neither? any one have photos?
Thanks in advance. I know someone will help out. I don't post much but read all the post everyday.



Bosheff
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Re: 31/32 measurement

#2

Post by Bosheff » Sun Apr 24, 2011 4:27 pm

Set the three p. plate adjuster nuts so three threads are exposed with the nuts installed. This is usually enought to keep the clutches from slipping and not so much as to have a stiff clutch lever....bosheff

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Re: 31/32 measurement

#3

Post by Bigincher » Sun Apr 24, 2011 5:13 pm

Bosheff is right, of course, but to answer your question, you measure form the surface your left finger is pointing to in photo #2. The dimension 31/32" isn't cast in stone, but it's a good place to start. Set the adjuster nuts per Bosheff, and then see what ya got..!

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Re: 31/32 measurement

#4

Post by rrhawg » Mon Apr 25, 2011 1:03 am

A quarter measures 31/32", Just take a quarter and use it between the flange of the smaller, spring retainer and the other plate. It's a lot easier than trying to measure it.
Rich

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Re: 31/32 measurement

#5

Post by nmaineron » Mon Apr 25, 2011 3:04 am

After I get my measurement I take the same measurement with the clutch compressed,if there are any differences I even them out.I have no tight spots this way.

papanhead49
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Re: 31/32 measurement

#6

Post by papanhead49 » Mon Apr 25, 2011 3:11 am

Thanks all for the quick replies. Helped alot. Great tip rrhawg never thought of doing something on that order. It is a little tricky measuring that with a pair of dial calipers.

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Re: 31/32 measurement

#7

Post by Cotten » Mon Apr 25, 2011 3:10 pm

Papahead49!

The thirtyseconds-of-an-inch measurement is pretty arbitrary when you consider plate wear, variances with aftermarket replacements, etc.

Of greater importance is that the pressure plate does not tilt.
It is totally valid to adjust the nuts un-evenly, if it allows the plate action to travel more squarely to the clutch pack.

(This is most difficult with five-stud hubs, and some substandard aluminum pressure plates.)

....Cotten

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Re: 31/32 measurement

#8

Post by Panshovevo » Mon Apr 25, 2011 3:51 pm

When assembling a clutch I start with the three turns per nut as Bosheff recommended. However, I have seen considerable variation in the travel of a pressure plate with all the nuts turned in equal distances. I started using a dial indicator to measure the travel at the position of the adjusting nuts, and adjusting the nuts as necessary to get equal travel. Then, I ride it, to check for slippage or drag. If further adjustment is necessary, I turn each nut a half turn in the appropriate direction, and try again. Might be overkill, but it works well for me. Smoother engagement, better lockup with less grinding and drag.
Regards,
John

papanhead49
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Re: 31/32 measurement

#9

Post by papanhead49 » Tue Apr 26, 2011 1:38 am

Thanks again for all the help. Made the adjustments on it today. Took a test ride about 15 miles. Everything worked great. Bike fired right up. 3 kicks after 3 primer kicks. Also replaced needle valve and seat and float fingers with new ones from Into the Wilderness. One question. This is the first foot clutch I've ever ridden so I don't have anything to compare to. It seems to me that the clutch should engage sooner than it does. Roughly alittle more than halfway. Is there any adjustments to make that makes it start to grab sooner. Thanks in advance.

papanhead49
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Re: 31/32 measurement

#10

Post by papanhead49 » Thu Apr 28, 2011 2:29 am

Anyone???

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Re: 31/32 measurement

#11

Post by RUBONE » Thu Apr 28, 2011 3:49 am

About all you can do with it is adjust the pull rod. Depending on the amount of free play the engagement point changes slightly. Just be sure you ALWAYS have some free play though.
Robbie

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Re: 31/32 measurement

#12

Post by FlatHeadSix » Thu Apr 28, 2011 4:53 am

papanhead49 wrote:Anyone???
panhead49!
I'll give it a try and throw in a little more "experience" obsevation (I also own a '49). That 31/32" setting is only a ballpark measurement when considering the possibilities of what has happened to all the components since 1949. You have already gotten a lot of good advice; start your setting with the nuts turned down to 3 exposed threads showing on the studs, make sure that the pressure plate is even ALL the way around, and make double sure that there is still a little free-play in the entire linkage before it tries to pull the clutch in. If you can kick it over (hot or cold) it is fully engaging, if you can put it into first gear with the engine running it is disengaging enough.

Now, for your last question, I have to ask a question first; does your clutch rod (from the pedal to the countershaft lever) rub on the outside of the primary cover? The reason I ask is because there are a LOT of places in that linkage that can wear out or bend, causing misalignment and excess free play. If the rod is rubbing on the outer primary cover it is usually worn at the connections, bent, or both. This is what affects the point of engagement, it usually results in having to push the toe of the clutch pedal further forward in order to get clutch engagement. Its not a major problem, it is only something that requires you to modify your "feel" of the clutch. It becomes a problem when the clutch will no longer completely engage or disengage.

ride it, keep an eye on it, and develope a "feel" for where it engages. Keep us posted.

mike

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Re: 31/32 measurement

#13

Post by Panshovevo » Thu Apr 28, 2011 2:14 pm

Do you have a service manual? If not, there is one available for download in the library section of this web site.
Your pull rod may need adjustment, the screw in the center of your pressure plate that controls the position of the release arm may need adjustment, or both.
Read the procedure in the manual and follow it.
How much free play is there in the release arm when the clutch is fully engaged?

Regards,
John

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Re: 31/32 measurement

#14

Post by Cotten » Thu Apr 28, 2011 4:42 pm

Papanhead49!

Often clutch adjustment confusion results from an illogical insistance that the friction discs upon the pedal assembly should offer significant resistance for modern street usage.

If you cross streams, cow paths, or run enduros, it makes some sense.

Otherwise, please release the friction assembly so that it pulls itself into gear like an auto.
(Relying upon the friction discs to keep the clutch dis-engaged is where the term "suicide" originated!)

This will hopefully give you the feel for balancing the adjustment of the clutch center-screw play against the play of the the throwout rod.

Trial and error can be rewarding, honest.

Anyone who sits at a stoplight with their pedal in the air and their foot on the ground is a blazeing idiot.
You can quote me on that.

....Cotten

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Re: 31/32 measurement

#15

Post by Bosheff » Thu Apr 28, 2011 5:20 pm

Either that or it's their first ride on a foot clutch H-D. Sadly, they are in for a rude awakening usually sooner than later....bosheff

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