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Servicing your own regulators
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150 is 5 psi above the "allowable range". Are you confident of the gauge accuracy of what you are using?
The service kit contains 3 conical seats of different height. Choose the taller one , this reduces the IP...
Thanks for reply. cannot see all of the page printing.
1) what should IP be? or what is acceptable range?
2) do main springs get stiffer if old and where do i get a new main spring if available.? Main HP seat brand new, Used a piston bullet so dynamic o-ring should be fine. what is this HP slom? o ring pinch?
I haven't yet cycled it many times yet.
Thanks for your help. mk
IP gauge is brand new. I don't know what is a conical seat. Nothing like that to my knowledge in the package.
1) what should IP be? or what is acceptable range?
2) do main springs get stiffer if old and where do i get a new main spring if available.? Main HP seat brand new, Used a piston bullet so dynamic o-ring should be fine. what is this HP slom? o ring pinch?
I haven't yet cycled it many times yet.
Thanks for your help. mk
IP gauge is brand new. I don't know what is a conical seat. Nothing like that to my knowledge in the package.
First and foremost make sure the piston knife edge is perfect.
See this thread:
How to Restore a Knife Edge Piston
Next, if there are no shims there are a few easy ways to lower IP a few PSI:
Use a PTFE grease on the piston stem, stem o-ring, and piston head o-ring.
Replace the seat (as per @Angelo Farina ) with a taller one. In the MK5/6/7/8/9/10 kits there are three seats. The tallest one gives the lowest IP:
Do not mirror polish the piston stem where it interfaces with the stem seal. Instead, break the shine with 600 grit or finer emery cloth.
If still no joy, try a polyurethane duro 90 -010 for the piston stem seal. Not my favorite, as they are expensive and have a short shelf life.
A radical approach, that only someone with a death wish would do, would shave the spring down just a little on a belt sander.
See this thread:
How to Restore a Knife Edge Piston
Next, if there are no shims there are a few easy ways to lower IP a few PSI:
Use a PTFE grease on the piston stem, stem o-ring, and piston head o-ring.
Replace the seat (as per @Angelo Farina ) with a taller one. In the MK5/6/7/8/9/10 kits there are three seats. The tallest one gives the lowest IP:
Do not mirror polish the piston stem where it interfaces with the stem seal. Instead, break the shine with 600 grit or finer emery cloth.
If still no joy, try a polyurethane duro 90 -010 for the piston stem seal. Not my favorite, as they are expensive and have a short shelf life.
A radical approach, that only someone with a death wish would do, would shave the spring down just a little on a belt sander.
Thank you all for your advice.
I discovered the o ring at top of HP seat holder had extruded into the area of piston and was interfering with proper function . the o ring pinch. Once i got it seated properly, I had a steady IP of 130.
Again , thank you for assistance of all who helped me on scubaboard. mk
I discovered the o ring at top of HP seat holder had extruded into the area of piston and was interfering with proper function . the o ring pinch. Once i got it seated properly, I had a steady IP of 130.
Again , thank you for assistance of all who helped me on scubaboard. mk
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