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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16227 Location: Wisconsin
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16227 Location: Wisconsin
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Posted: Mon Feb 13, 2017 10:35 am Post subject: |
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O-rings are generally manufactured to very close tolerances and prefer a shielded mounting environment that supports the O-ring in all directions. O-rings prefer tight chambers and groove mounting. The best way to mount an O-ring at the tip is in a groove so you would need to fabricate a short cylindrical spacer that will fit the threaded cup end and place a groove in it of the appropriate depth and width to adequately support the O-ring type and size you wish to us. That O-ring should be sized with an outer diameter that allows an interference fit inside the barrel, an inner diameter that allows an interference fit on the 3/16" threaded stub and a thickness that fills 99% of the groove.
I would suggest taking a look at Chevron type seals (V-packings) instead of O-rings for the 4 packings.
Here's an example in sizing:
Quote: | V0037500625FF VP. 0.375 X 0.625 FEMALE V.PACKING - NEOFAB Details...
V0037500625FM VP. 0.375 X 0.625 MALE V.PACKING - NEOFAB Details...
V0037500625FV VP. 0.375 X 0.625 C.RING V.PACKING - NEOFAB Details... |
You can view these at:
http://www.sealsourceinc.com/website/catalog_list.asp?cat=Vee+Packing&code=150002&CatgName=Std%20V%20Packing%203/16
They cost $2.93 each. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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wesk Site Administrator
Joined: Apr 04, 2005 Posts: 16227 Location: Wisconsin
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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Posted: Mon Feb 13, 2017 8:37 pm Post subject: |
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Ha! He didn't say no! He'd like dimensions, and some
info on the pump. Other than cost to tool up he is
concerned about not being able to test the product.
I told him we could probably scare up some volunteers.
He's in Tyler. Maybe Cacti Ken could amble over.
On a related note is there a way Wes to snip the latter
portions of this thread and stick them onto a new post?
We've kinda wandered off the original question. _________________ Brian
1950 M38
MC11481
http://www.willysmjeeps.com/v2/modules.php?set_albumName=album372&op=modload&name=gallery&file=index&include=view_album.php |
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G740 Member
Joined: Jan 27, 2006 Posts: 498
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Posted: Tue Feb 14, 2017 6:39 am Post subject: Cups |
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I have a box full of NOS cups for the primer pumps.
John |
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4x4M38 Member
Joined: May 30, 2014 Posts: 3440 Location: Texas Hill Country
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SRColeman Member
Joined: Aug 12, 2017 Posts: 1
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Posted: Sun Aug 13, 2017 8:04 am Post subject: M38 and M Series Leather Primer Cups and Packings |
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I now sell both the Leather Cup and 4 Leather Packings on eBay. (Hand made reproductions)
(If you guys are still interested!).
I made them from Wes K's diagram.
Cup part: 7037062
Leather Packings (4) part: 7097359
Just go to eBay and search: M38 and M Series Primer Leather |
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