4G Grease Dashpot 464261

chris.matthews
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Re: 4G Grease Dashpot 464261

Postby chris.matthews » Thu Oct 03, 2019 12:07 pm

Hello
I don't have a drawing (or a greaser) but Draganfly Drawing of MN1E magneto 'almost' shows the extended part that engages with the distributor shaft.
Who supplied the greaser ?
Best regards
Chris

chris.matthews
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Re: 4G Grease Dashpot 464261

Postby chris.matthews » Thu Oct 03, 2019 12:08 pm

Hello
I don't have a drawing (or a greaser) but Draganfly Drawing of MN1E magneto 'almost' shows the extended part that engages with the distributor shaft.
Who supplied the greaser ?
Best regards
Chris

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paul.wirdnam
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Re: 4G Grease Dashpot 464261

Postby paul.wirdnam » Thu Oct 03, 2019 3:19 pm

This might help.

My 4G project only has a slotted screw where the greaser should be...it is 1/4" 26tpi and has a peg on the end to secure the vertical rotor arm drive shaft.

Image

I knew I had a spare mag somewhere but it was at the bottom of some heavy stacking boxes but today I managed to get to it and....low-and-behold, it has the orginal Stauffer greaser on it. I'm now going to use this on my 4G project, so not for sale I'm afraid, but I can provide any measurements if anyone wants to make one.

In the last photo, I can confirm that there is enough room to fit the new, bigger Stauffer greaser but you would need to modify the threaded end, which should be very easy as long as you have a lathe and can silver solder.

Image

Image

Image
Paul

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Richard Kal
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Re: 4G Grease Dashpot 464261

Postby Richard Kal » Fri Oct 04, 2019 12:59 am

Paul,
Very helpful; thanks!
Can you confirm the thread OD & tpi that the dashpot screws onto?

Also the dashpot OD and length?

Thanks,

Richard

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paul.wirdnam
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Re: 4G Grease Dashpot 464261

Postby paul.wirdnam » Fri Oct 04, 2019 12:43 pm

Richard Kal wrote:Paul,
Very helpful; thanks!
Can you confirm the thread OD & tpi that the dashpot screws onto?

Also the dashpot OD and length?

Thanks,

Richard


Richard,

The cup thread is 7/16" 26tpi.
The length of the removable cup is 11/16" and it's OD on the knurled part is 9/16"
Paul

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chris.shearwood
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Re: 4G Grease Dashpot 464261

Postby chris.shearwood » Fri Oct 04, 2019 12:48 pm

Paul,
If I remember correctly there is supposed to be a wire spring clip that prevents the dashpot knob from unscrewing on its own.
I can`t make out from your photos if your original dashpot has the clip or not. I think this is an important part of the dashpot.
1946 4G, 1950 NG and 1951 VH

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Richard Kal
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Re: 4G Grease Dashpot 464261

Postby Richard Kal » Fri Oct 04, 2019 1:11 pm

Paul,
You have been a great help; thanks!!

Richard

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paul.wirdnam
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Re: 4G Grease Dashpot 464261

Postby paul.wirdnam » Fri Oct 04, 2019 3:26 pm

chris.shearwood wrote:Paul,
If I remember correctly there is supposed to be a wire spring clip that prevents the dashpot knob from unscrewing on its own.
I can`t make out from your photos if your original dashpot has the clip or not. I think this is an important part of the dashpot.


Chris,

No sign of one on mine but I was wondering what would stop it from getting lost. It the spring on the inside or outside? Not sure what you mean by "clip".
Paul

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chris.shearwood
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Re: 4G Grease Dashpot 464261

Postby chris.shearwood » Fri Oct 04, 2019 8:46 pm

Paul,
To refresh my memory I have removed the knob of the dashpot and left the main part screwed into the mag/distributor. There is a wire in the knob. There are two machined grooves or channels on the inside of the grease cylinder of the main part. When the knob is screwed onto the main part the ends of the wire click out of, and then into, the grooves every half revolution. To attach the wire to the knob it looks like the wire passes through a tunnel on the end of the knob but how this is done eludes me. Too bad you live too far away to drop in for a beer and a look! I'll attach a couple of photos to try and show what I am trying to describe. I've made the photo files quite large so you can zoom in.
Attachments
dashpot 4.JPG
dashpot 3.jpg
1946 4G, 1950 NG and 1951 VH


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