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help quick, Avy nitrogen pressure?

B-boy

Chimp
Jan 26, 2002
48
0
Prince George/Terrace , B.C.
Leave for whistler tommorow, MX shop closes in an hour... what pressure of Nitrogen do I need for my recharge?? (150lbs rider on a bb7 if that means anything).. (its been well over a year, it must need one)

Thanks!!
 

MikeD

Leader and Demogogue of the Ridemonkey Satinists
Oct 26, 2001
11,737
1,820
chez moi
Just did mine yesterday; inst. book says 175 lbs...but that's for my shock, dunno if'n it's standard....
 

B-boy

Chimp
Jan 26, 2002
48
0
Prince George/Terrace , B.C.
MikeD said:
Just did mine yesterday; inst. book says 175 lbs...but that's for my shock, dunno if'n it's standard....

thanks! I managed to find my little cheatsheet of numbers before I left... it said 250, quoted from an email from craig.. I also seem to remember BrainHCM saying 260 for him. Guess it might depend on the bike model.
 

Brian HCM#1

Don’t feed the troll
Sep 7, 2001
32,278
396
Bay Area, California
B-boy said:
thanks! I managed to find my little cheatsheet of numbers before I left... it said 250, quoted from an email from craig.. I also seem to remember BrainHCM saying 260 for him. Guess it might depend on the bike model.
I think it does depend on the bike.
 

vitox

Turbo Monkey
Sep 23, 2001
2,936
1
Santiago du Chili
better to put a lot than too little, craig explained to me this week why, you see, the seal head inside the shock is only held in place by the internal pressure, this means that too little pressure and the seal assembly could slide up and down inside the shock body, this is very bad because you will cause both the shaft seal and the oring that seals the body/seal head interface to wear.


if you dont get the exact figure from craig or someone with a similar setup, go with 250 or higher i think youll be better off that way.
 

B-boy

Chimp
Jan 26, 2002
48
0
Prince George/Terrace , B.C.
vitox said:
better to put a lot than too little, craig explained to me this week why, you see, the seal head inside the shock is only held in place by the internal pressure, this means that too little pressure and the seal assembly could slide up and down inside the shock body, this is very bad because you will cause both the shaft seal and the oring that seals the body/seal head interface to wear.

I think this may have happened to my shock :(

Before I left for whistler I had it recharged to 250, and this was the first time in probably a year and a half at least. So needless to say I've neglected it and it was basically empty. Now in whistler, and recharged, I'm finding my bike is taking square-edged fast hits really harshly (like a rocky fireroad type situation). Its practically *banging* on certain hits... I checked everything it could possibly be.

Does this sound like a problem that could arise from a badly neglected Avy? (almost 3 years old, NO service, and ONE nitro recharge)

Needless to say I'll be sending it back to Craig for a servicing pretty soon, something I would've had done locally at an MX shop a long time ago, but no shop up here ever wants to touch it.

thanks for any opinions :monkey:
 

Brian HCM#1

Don’t feed the troll
Sep 7, 2001
32,278
396
Bay Area, California
B-boy said:
I think this may have happened to my shock :(

Before I left for whistler I had it recharged to 250, and this was the first time in probably a year and a half at least. So needless to say I've neglected it and it was basically empty. Now in whistler, and recharged, I'm finding my bike is taking square-edged fast hits really harshly (like a rocky fireroad type situation). Its practically *banging* on certain hits... I checked everything it could possibly be.

Does this sound like a problem that could arise from a badly neglected Avy? (almost 3 years old, NO service, and ONE nitro recharge)

Needless to say I'll be sending it back to Craig for a servicing pretty soon, something I would've had done locally at an MX shop a long time ago, but no shop up here ever wants to touch it.

thanks for any opinions :monkey:
Craig will tell you to have it recharged at least every 6 months because it does leak out over time.
 

vitox

Turbo Monkey
Sep 23, 2001
2,936
1
Santiago du Chili
B-boy said:
I think this may have happened to my shock :(

Before I left for whistler I had it recharged to 250, and this was the first time in probably a year and a half at least. So needless to say I've neglected it and it was basically empty. Now in whistler, and recharged, I'm finding my bike is taking square-edged fast hits really harshly (like a rocky fireroad type situation). Its practically *banging* on certain hits... I checked everything it could possibly be.

Does this sound like a problem that could arise from a badly neglected Avy? (almost 3 years old, NO service, and ONE nitro recharge)

it could be you know, youll be sending it back so speculation is less useful than nomally but anyway if its about finding an explanation for that binding that relates to the fact that the shock probably ran with no pressure for a long time, id say that maybe your shaft bushing/seal was allowed to wear unevenly and this might let it bind now.

btw did you check the shock bushings ? seized?