Power Master 760
- Thread starter Kashwort
- Start date
parts for 760s of that generation are found mostly on eBay in my experience. First gen 760s don't have serial numbers, pretty sure about that. The plug in the end of pump cylinder that the pivot is in has a couple numbers stamped in it that are the build month and year. What parts do you need?
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I need a seal rebuild. I lose air right away when pumping. There also the cup on the end that was dried out. Does that even come off or is it a while part. Looks like it's pressed in. The only numbers I found were 88 on the plug.
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There is a small quad seal that is the usual culprit on the leakage side. Both of mine needed that. The pump cup is a typical fail too. Mac one was the source for 760 stuff, or was as of 2017. There is quite a bit of stuff on eBay for software on the first gen or "self cockers". Cant read the numbers on the pic of the pivot but 88 is probably august '68. There are exploded parts diagrams on internet to show part numbers and general assembly. Lots of good you tube vids available too.
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I will look into all that. Thanks for you help, I have confirmation that it is a first gen 760 now. I'll keep you posted as how it go.
Thanks again
Thanks again
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Hello, Im new to this forum, but not really new to the 760 model.I had one as a kid back in the mid 70s and learned back then to work/fix these.Recently, i bought the seals on ebay to fix my ol 760 that stopped working in the early 80s, which i guess is why im replying.
Mine are 2nd/3rd variants, but the insides are the same as above.One issue is with the bushing on the pump cup.Which is pressed and needs to cut off.I found brass bushing at a local tool retailer that i was able to modify and use as a replacement with my new cup seal.If there's interest i can take pics.
There are guys who sell a cup replacement that uses an o-ring, but i like the cup seal better.
Mine are 2nd/3rd variants, but the insides are the same as above.One issue is with the bushing on the pump cup.Which is pressed and needs to cut off.I found brass bushing at a local tool retailer that i was able to modify and use as a replacement with my new cup seal.If there's interest i can take pics.
There are guys who sell a cup replacement that uses an o-ring, but i like the cup seal better.
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