Crosman 600 Vintage Semi-Auto Pistol - seal kit o-ring sizes

[fe7565]

Ok, finally managed to snag a Crosman 600 for a decent price and it's on its way. It does function as intended (according to the seller), but it leaks out the CO2 quick. There are several seal kit options available online, but I want to buy my own O-rings all at once because I need to buy some spares for my Vulcan and Daystate anyway.

Where can I find the various O-ring sizes it needs? I know the best to buy is Duro 90 urethane and I plan to get them from "The O-ring Store". Thanks for any tips.

 

[fe7565]

I'm excited, I think I got version One which is presumably the rarest. I compared the photo of the end cap (the pistol is being shipped still) to the end caps in this article below, and looks like it has the screw-in piercing type. 

ARTICLE ON THE HISTORY OF THE 600: 

http://www.pistolplace.com/2015/07/14/vintage-air-pistol-review-the-crosman-model-600-and-model-677-plink-o-matic/ 

from the article: ".....There were three main variations in the Model 600 during its production life. Changes were mainly focused on CO2 piercing. On the first models the CO2 piercing pin was incorporated in the end cap, and the CO2 cartridge was inserted with the neck facing outwards (towards the end cap). From around 1964, CO2 piercing was incorporated into the firing valve, and CO2 was inserted with the neck facing inwards (away from the end cap). Up to 1966 the end cap was a plain screw-in type with a hole through which the CO2 cartridge could be seen, but from 1966 – 1970 a button type end cap (similar to the end cap used on the Crosman Mark 1) was used. However, Crosman service stations were instructed to replace earlier CO2 piercing system with the later versions if a Model 600 was returned for repair. So, many early 600s may have been retrofitted with one of the later CO2 piercing systems....."

 

[Jonah]

Let us know how it turns out. I have two of the 600's. They are great fun to shoot.

 

[ajshoots]

Get ahold of Mac1 Airguns he seals rebuild kits and has very high quality orings. I was gonna order orings for my MKII from the oring store, but I also needed a new valve stem seal so just ordered the whole kit from Mac1. Tim is a very smart dude and was very nice to chat with.

 

[fe7565]

Thanks ajshoots. Called him last night and a rebuild costs $75 including parts and rebuilt valve. Reasonable. But I want to try doing it first myself for fun...and for a challenge. There are a couple of great DIY guides on the net.

 

[ajshoots]

I was gonna try to reface my valve seal, but it was shot. I understand wanting to do all the work yourself. I do all my own gun work and hate paying for things I can fix or make myself. Best of luck on your rebuild!! Keep us posted.

 

[DangerousDan]

Did you get it going?