Scubapro Pilot

[Golan68]

I've been trying to get the correct o-rings sizes and type for the SP Pilot[second stage not the bc].
Since Scuba pro doesn't support it anymore my local dealer , though had tried, couldn't help more then getting the exploded view. but the part numbers for the old o-rings are not applicable for today.
if some one knows the equivalents for the old o-rings, or the direct replacements, it can be good idea to share between all of us who still have a Pilot and will not give up on this very very nice piece of equipment.

 

[halocline]

Is yours converted to air1 internals or does it still have the original pilot valve? I'll try to dig up a schematic and a table for converting the SP numbers to standard o-ring sizes.

 

[Golan68]

Mine is the original, I have SP part numbers but I can't find the equivalent . I'll put all the numbers soon. Thanks for your help.

 

[Golan68]

 

[axxel57]

Vintage Scubapro Pilot 128 2nd Stage Regulator Complete O Ring Replacement Kit | eBay

 

[halocline]

This might help. The schematic is supposed to be a higher resolution pdf, but when I attached it it turned into a jpg. If you can't use it, let me know I'll try again.

 

[redacted]

Vintage Scubapro Pilot 128 2nd Stage Regulator Complete O Ring Replacement Kit | eBay

Thanks for the link. Using a bit of graphic scaling, I'm failry sure the small o-ring is a 2-002.

Using a cliper on the enlarged screen image, I estimated the ID of the small o-ring to be 1.3 mm. Using the same technique on the small red o-ring which is a 2-010, I measured its ID at 7.3mm. The actual ID of a 2-010 is 6.07mm which scales the small o-ring to have an ID of 1.08mm. The actual ID of a 2-002 is 1.07mm so I think we have nailed that tiny SOB.

 

[Golan68]

I saw the list on eBay , problem is that these kits are too old. I bought today all the orings epdm except for the small one Id 1mm width 1.3 ,and the other one is 6 *1.8 , the bigger one is very soft something like duro 50, and I couldn't find it also. for the office I used silicone oring duro70 and also for the pilot valve. It works great. but I must find the small (sob) and the soft one on the valve shaft, I'll put the list with sizes soon.

 

[elan]

I measured few of them while rebuilding my converted one last time

Predive switch - 117
Hose plug 010
Orrifice assembly 013
Cap -22

 

[redacted]

I saw the list on eBay , problem is that these kits are too old. I bought today all the orings epdm except for the small one Id 1mm width 1.3 ,and the other one is 6 *1.8 , the bigger one is very soft something like duro 50, and I couldn't find it also. for the office I used silicone oring duro70 and also for the pilot valve. It works great. but I must find the small (sob) and the soft one on the valve shaft, I'll put the list with sizes soon.

I used the same scaling method to check OD and came up with an estimate of 3.67. A 2-002 is spec'ed with an OD of 3.61 so I am confident it is a 2-002.

What is the nature of the metal seating surface that these two o-ring seat against? I am assuming it is a rather dull "knife edge" which would require a softer material