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Replacing SPG

Replacing SPG

Post Number:#1  Postby Peter Griffin » Fri Mar 21, 2008 3:36 am

I just obtained a new SPG for my rig and need to replace the old one. I'm planning to make the switch on my own, since it's too costly(time and money-wise) to send it to a DS to get it done. Any instructions on "how-to" would be very helpful. i have everything in my hand now, the proper wrench, replacement o-ring and silicone lube. just lack of encouragement from fellow divers.Anybody?
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Re: Replacing SPG

Post Number:#2  Postby Mephisto the Heretic » Fri Mar 21, 2008 5:35 pm

Just twist, lube, replace..easy only...dont worry. its simple, difficult to go wrong.

but remember to test it after replacement.

Sorry cant help you much, but its thats simple.
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Re: Replacing SPG

Post Number:#3  Postby kimseng the maverick rogue » Fri Mar 21, 2008 5:51 pm

let me try to help...

1. SPG has a T shaped thing with 2 o-rings that come with it. Make sure it's there and lubricated.
2. Connect to HP hose.
3. Connect HP hose to HP port on the 1st stage. Make sure to lube the o-ring as well.

And i guess you're done.
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Re: Replacing SPG

Post Number:#4  Postby Peter Griffin » Sat Mar 22, 2008 11:10 am

alright...thank u guys..got it done already..tested..was hissing the first time..freaked me out,thought i went overboard with twisting the hose into the 1st stage(ruined thread) then i figured i didnt tighten it hard enough.its fine now..ready to dive again..thanks mephisto..thanks kim seng!!
really appreciate it!

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Re: Replacing SPG

Post Number:#5  Postby sealion » Mon Mar 24, 2008 1:27 pm

May I ask 1 question; how hard @ how tight should we tighten/twist the hose into the 1st stage? How do we know that it is tight enough? Thanks guys!
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Re: Replacing SPG

Post Number:#6  Postby Peter Griffin » Mon Mar 24, 2008 11:58 pm

i would say not too tight(u might damage the thread)...more or less 1/8th of a turn..turn the wrench only so much, to the point where u wont be able to twist the hose off of the 1st stage with ur bare hands..that's from my own observation on my rig(may differ from yours). the o-ring will give the proper seal needed. check for any leak is mandatory!


like my instructor used to say upon noticing a leak on the first stage..."small bubble..no trouble"..;dont take that for granted..i'm just kidding :laughing11:
Last edited by Anonymous on Tue Mar 25, 2008 12:06 am, edited 1 time in total.
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Re: Replacing SPG

Post Number:#7  Postby MasAduka » Thu Jul 03, 2008 9:59 pm

my spg, i dont how the hell, the pressure gauge got frosted. i had tried to dry it, it did not help.
it is still operating. care to assist?
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