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Post by sheriffdiver on Mar 26, 2022 12:14:11 GMT -8
I'm looking for the 2 smaller springs for a Calypso IV 1st stage. One spring fits inside the other. I have this spare 1st stage and when I took it apart I discovered the springs were missing. Basically looking for a parts 1st stage or preferably just the springs. If you're curious about what the springs look like you can watch the video on You Tube where the 1st stage is disassembled and you'll see those springs.
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Post by antique diver on Mar 26, 2022 13:38:26 GMT -8
Earlier versions of the CJ did not have the small springs. Seems like the springs were only there to enable reducing the intermediate pressure by turning the retaining threaded orifice clockwise. Maybe a ploy so the regulator could be advertised as "adjustable".
I recall backing the retainer all the way out on some of those regs, leaving no tension on the springs, to get the IP up for better performance. You might test the current IP and breathing characteristics to see if it suits you as-is. If it's too easy to suit you look to see if there are removable shims at the main spring. You may like the performance just fine as it is.
If needed I have new old stock hp seats as well as the brass retainer that was found to be somewhat important to keep the seat in place. If yours does not have the castellated retainer you should add one. There was an important bulletin and recall notice sent to all dealers about that situation. I have a copy here somewhere that I can post if interested. It should also be found on the VDH site, as I sent Bryan a copy years ago.
Give it a try and let us know how it works.
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Post by sheriffdiver on Mar 26, 2022 18:08:00 GMT -8
I checked the IP and with the adjustment screw turned clockwise all the way in it is at 135 for the IP. Which side of the piston would a shim be placed?
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Post by antique diver on Mar 27, 2022 4:08:40 GMT -8
I checked the IP and with the adjustment screw turned clockwise all the way in it is at 135 for the IP. Which side of the piston would a shim be placed? If the two small springs are missing from under the adjustment screw it will have no effect on IP by turning it in either direction, and 135 is reasonable starting point. I see no reason to lower that pressure by adding the two small springs between the adjustment screw and the piston. You could even leave the adjusting screw out. BTW, if it is in place and backed out too far it may prevent the hose fitting from completely seating. The main spring is below the piston, and it may or may not have thin SS shims above or below the spring. If you are satisfied with the breathing performance there is no reason to add more of those shims, but if higher IP is needed to improve breathing (after insuring the second stage has a new seat and is properly adjusted) then adding shims above or below the spring will raise IP a bit. I would proceed with complete overhaul of both stages, and if you can adjust the second stage to suit you there is no reason to be overly concerned about the IP. I hope this helps, but if I haven't explained it correctly please let me know! Looking forward to hearing about your results. BT |
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Post by sheriffdiver on Mar 27, 2022 5:53:24 GMT -8
I still would like to find the castle fitting for that recall update. It doesn't have that either.
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Post by antique diver on Mar 30, 2022 5:22:05 GMT -8
I still would like to find the castle fitting for that recall update. It doesn't have that either. I have those ($5) and a few other parts for the Calypso. I think I have some reserve modules as well in case you want to convert it. See your messages for how to contact me via email. |
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