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Measuring O-Rings

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Bryanj:
Its an early US one Ken, not sure if its the one i scanned, if so wiĺl send you a dvd, just checked and its the K1/2 500 parts in Ash's dropbox with my name on it, not the JDM one

McCabe-Thiele (Ted):

--- Quote from: Orcade-Ian on June 17, 2023, 06:14:20 PM ---Ken,
Not sure if this might be useful but many years ago I wanted to re-furbish my Lake and Elliot Trojan trolley jack which was failing due to deterioration of seals (I bought it new in the early 80's). My seals were special and most places needed an order of 1000 units.  I contacted Barnwell services in Birmingham and they made some for me.  Might be worth a call or email
(web site http://www.barnwell.co.uk/) They were very helpful and not expensive either.

Ian

This is the story of the jack

http://www.stallard-engineering.co.uk/stories/other/Trolley%20Jack.htm

--- End quote ---
Your Jack story reminds me of my first trolley jack a used Bradbury that I bought back in 1978 for  £40  with a slight creep. Local motor factors fitted new seals that lasted until around 1995 when the creep returned. Repaired again for by a mates contacts foc. It gave out completely about 5 years ago. Ended up with a CostCo replacement that is about a quarter of the weight.

davidcumbria:
Great resource that Bryan parts list. I need a replacement o ring for the gallery  plug behind the alternator. £13.60 delivered for one from DS. ( you must be shitting me) If the size is correct in Bryan’s part list £2.80 for five free delivery on eBay.  ;D ;D ;D

Oddjob:
Cheaper here David.

https://www.ebay.co.uk/itm/293213824316?hash=item4444e7e53c:g:eD8AAOSwz6Bdb7yV&amdata=enc%3AAQAIAAAA4MsAP9ribbu6qNn%2BAzCFoCoIM8V0xhO6Sq%2BEGAlhMqWAU9E94lo%2Bxyzho6AEPib9W6APtLnHydKb%2FEJt7uUhTYArP9ZprxbwXbIr6dZTvOa7LPh%2BegaTQFrWLoVQ3GKy8mkRJXdELFF4j%2B%2FdhBDVSTs6l35MjBf0xj7cv9BNRa%2FU6xSho6vDkEcCcwzNMOTCkm5C%2Fw9OI%2Brpq6AZYZycEvKdXL%2B9fS7WUBEjJbTGEJTOuyp%2BmuZCRGLUaE35Zz1ktEZDWaGGNbjX4uS6aUhYAWZ155huFOhixBkdR5zmo7GH%7Ctkp%3ABk9SR_qUvL6aYg


Looked at that list Bryan, interesting. It doesn't however show the ring behind the oil pump cover and lots of the others are still missing parts of the sizes, tappet covers for instance are still shown as 30.8, no section, as are the 2 on the pump and quite a few others. The float bowl drain screw is also missing the section. I wonder if Yamada (makers of the oil pump) is still in business? a quick email to them would solve the question, if they answered of course.

Seems they are, sent them an email, lets see if they reply.

Oddjob:
O-Rings arrived today for the oil pump. The difference between the old and the new when laid side by side or over the top of each other is noticeable. I got 3 different sizes for the O-Ring under the cap and the one I thought it would be wasn't the best fit. It did fit but wasn't to my liking, I think I've got the clearance bob on, with the cover laid in place with no O-Ring fitted and it turned you can hear metal to metal contact, with an O-Ring in place you cannot so it's clearly holding the surfaces apart.

I'll send a complete set to a mate who's running this type of oil pump and ask him to test them to see if they leak. As the large O-Ring and the smaller dowel O-Rings are the exact size I'm not expecting any problems, the relief valve one is also a very good fit but is a close size not the exact size, that should be ok but I've got a quote for some specially made the exact size needed and the price difference is 2p so might as well go for the exact size, it's the cover ring I want to check, just to be safe.

If they work as expected I'll sell a complete kit for the 500/550 oil pump for £10 inc P&P.

If anyone wants some O-Rings for the 3 oil gallery plugs on the lower crankcase, I'll be selling them as well (not the one behind the generator, that's a different size, 91319-300-000, 8 euros at CMS, £9.94 at DS), part number 91315-044-000, seems to fit all the fours. CMS are charging £2.06 each, DS £2.04 each, plus P&P which we all know makes these bloody expensive if that's all you need. I'll do all 3 and include the one behind the generator so all 4 for £6 inc P&P.

I'll also being having some tappet cover and inlet manifold O-Rings made, the EXACT size, not as close as you can buy off the shelf like most Ebay sellers, 8 for £5 inc P&P or 12 for £8 inc P&P. I'll let you know when all these offers are available.

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