The inner workings of panhead forks.

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1950Panhead
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The inner workings of panhead forks.

#1

Post by 1950Panhead » Sat Dec 11, 2010 7:18 pm

It looks to me like the pair of .187" holes in the valve tube is responsible for 99% of the hydraulic action in the fork and the valves are practically irrelevant.
I added 10 oz of ATF and when I push the tube down (no springs) and pull it up I can hear the fluid rushing through the holes and feel the resistance.
If anyone thinks the valves do anything important explain how it works.

Photo 1 Holes in valve tube.
Photo 2 Tools to remove and install bushings.
Photo 3 New bushings.
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john HD
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Re: The inner workings of panhead forks.

#2

Post by john HD » Sat Dec 11, 2010 9:10 pm

where did you get the tool? or did you make it?

the toothed washers at the top of the damper are supposed to shuttle back and forth adding to the dampening effect.

if that little spring is out of order they don't work very well or at all.

clunk!

i am running atf in mine too.

john

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Re: The inner workings of panhead forks.

#3

Post by thepigstye » Sun Dec 12, 2010 1:31 am

What are all the parts companies trippin' on these days. Go to the auto parts store, Ya can't buy 1 1157 bulb, ya got by 2. Try to buy a single slider for a wideglide and ya have to purchase THE ENTIRE FREAKIN' LEFT AND RIGHT SLIDER ASSEMBLIES. No one wants to sell the actual part ya need. Greedy bastards. I hope all y'all chinese importin' "enterpreneurs" go BROKE.............................................

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Re: The inner workings of panhead forks.

#4

Post by Bigincher » Sun Dec 12, 2010 2:32 am

I'd sure like to know more about the bushing tool, too.

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Re: The inner workings of panhead forks.

#5

Post by thepigstye » Sun Dec 12, 2010 3:02 am

I have a bushing removal tool also. For sale or rent or trade
Mutt

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Re: The inner workings of panhead forks.

#6

Post by Bigincher » Sun Dec 12, 2010 3:52 am

thepigstye wrote:I have a bushing removal tool also. For sale or rent or trade
Mutt
Would you like to share where you got it? Or just sell it to me outright? Send me a PM with the price....

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Re: The inner workings of panhead forks.

#7

Post by thepigstye » Sun Dec 12, 2010 4:32 am

I had a friend machine it for a job about 13 years ago. I described what I needed and he made what he thought would work. He was right !!! I'll see if I can post a pic of it tomorrow.

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Re: The inner workings of panhead forks.

#8

Post by Panacea » Sun Dec 12, 2010 5:42 am

thepigstye, After replacing the bushings, would a sunnen be needed? Bills in PA. does bushing replacements and I was wondering if this is a barnyard job or not...Mike

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Re: The inner workings of panhead forks.

#9

Post by thepigstye » Sun Dec 12, 2010 3:55 pm

Yep, all bushings require honing after ya replace them.

My left slider leaks oil out the bottom. I have tried EVERYTHING I can think of to get it to seal. No luck. So what are suggestions short of buying a new freakin' front end.

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Re: The inner workings of panhead forks.

#10

Post by Panacea » Sun Dec 12, 2010 4:45 pm

The stud on the bottom of the dampener has flats that keep it from turning when you tighten up the nut, sometimes the flats will extend thru the hole in the bottom of the slider too far, so the nut can't squeeze the assembly enough to prevent a leak. The solution is to add a couple more paper washers at the base of the cup (dampener tube lower bushing)...Mike

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Re: The inner workings of panhead forks.

#11

Post by thepigstye » Sun Dec 12, 2010 5:27 pm

Thanks Mike. I will look at that when I pull the slider.I need to install new upper seals in both anyway.I bought a NOS springer from Sarafan in 1986, when I started building teh bike. LOved it. Sold it with a Knucklehead basket case, now kick myself in the ass everytime I think about it. The ride was WAY better than with the Glide.

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Re: The inner workings of panhead forks.

#12

Post by 1950Panhead » Sun Dec 12, 2010 9:08 pm

I made the tools.
Driver is .5" x 1.738, 3" x 1.604, .5" hole in center.
Puller is .5" x 1.738, radiused.
Bushings must be pressed in and honed or reamed to 1.627
Jerry

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Re: The inner workings of panhead forks.

#13

Post by thepigstye » Sun Dec 12, 2010 9:32 pm

Ok, let me see if I can do this right. Here are the parts (minus the slide handle, which I couldn't dig right out.
2 orings, 2 hlaves of teh puller and the rod assembly with the tapered end
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Re: The inner workings of panhead forks.

#14

Post by thepigstye » Sun Dec 12, 2010 9:35 pm

sorry about the blurry close up, but you get the point.
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Re: The inner workings of panhead forks.

#15

Post by thepigstye » Sun Dec 12, 2010 9:36 pm

Install both puller halves onto rod,taper facing tapered end of rod and install both o-rings in their grooves on the puller
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