fountainbel has asked if I would post this superb working drawing of the tool he has designed and manafactured. I am happy to do so, and I'm sure that all menbers will join me in my thanks to him.

Thanks for putting the sktech on the board Chris !
As shown on the drawing,the spring loaded plunger top is slightly made under an angle, allowing eaier entry in the cap.
Note the extending plungertop should also made somewhat round - paralel with the diameter of its housing - ensuring full axial contact in the clutch slot.
As explained in reaction to your initial posting, the tool - pulling on only one clutch slot -is not optimal.
One better pulls on 2 over standing slots, but after several tests it proved working rather well for me.

Thanks fountainbel for freely sharing the drawings of a tool you developed. Your generosity is very uncommon...

It would be nice if you can also describe the proper usage procedure along with precautions in a short note.

Best regards,
Hari

It should be noted that Stuart Hawkinson has been making and selling finely-crafted and well-designed clutch removal tools which pull on all five cutouts (and now has a version with four fingers, for very early-production caps).

David,
I'm sure there are more proffesional , hence better tools on the market.
Pulling on the 5 slots surely is the proffesional way to go.
I expect however the cost of such a tool will be hardly digestable for the "occasional" repairer.
As stated in both my earlier related postings , I'm fully aware this is not a perfect tool.
On the other side it's simple, rather easy to make & it works rather well in my experience.
Given the above I have no intention in selling the tool, I only wanted to shear my eperiences with other "occasional" Parker 51 repairers.


edited for typo's

There are no right Or wrong, A good tool to work with.

So how do the tools pull out the clutch ring? Do they go in, grip the fingers and pull them closer to the center of the cap-toward the tool- allowing it to be extracted?

Pete,
The small spring loaded transversal pin slides inwards (pin is made one side under a slight angle to facilitate entry) when pushing the centering body in the springclutch/cap.
When rotating the centering body a little, the spring loaded pin automatically engages in one of the 5 slots in the springclutch.
When the handnut is screwed further, the external bushing- having a 5mm deep centering chamber- is centering over the external diameter of the cap.
Turning further, the cap front backs up against the 0.4/0.5 narrowed diameter step of the external bushing.
At that moment one starts effectively to extract the spring clutch out of the cap.
The tool allows to extract the springclutch over its total length;
Hope this clarifies the functionality.

BTW, I've just finished & tested a prototype of a "perfect" springclutch extractor.
This tool uses a spring collet which features 5 or 4 extractor fingers which engage in all 5 ( or 4) slots of the springclutch.
Consequently the tool is however rather complex & much more difficult to make.
I'll try to post some pictures later on