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#1 |
Registered User
Join Date: Nov 2010
Location: Nor Cal
Posts: 8
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Rear air shock psi. with leaf springs 71 C20
So, today I loaded my truck up with some busted up concrete and noticed it squating pretty good. Looked under it to see if anything was abnormal looking and saw that I had air shocks in the rear. News to me. I was more worried about it running good and not leaving me stranded when I bought it. So I spent most of my time and money on the engine and tranny. Does anyone know what the proper psi is or if this is an aftermarket shock addition? The truck runs great but I rarely drive the truck due to gas prices. When I do, I make it work harded than a Grand Canyon Mule. So does anyone know the psi recommendations for the loaded and unloaded weights. Is usually unloaded but when I do use it, it LOADED.
Thanks Joe |
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#2 |
Registered User
Join Date: Dec 2012
Location: Altoona Iowa
Posts: 481
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Re: Rear air shock psi. with leaf springs 71 C20
air shocks are strictly aftermarket for our trucks........alot of people have swapped out the coils with bags to get a better ride and actually adjust for that heavier load. And all bags will be different as far as ideal air pressure. Do you have a single tube bag or a double convoluted bag?
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#3 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Rear air shock psi. with leaf springs 71 C20
He said air shocks not bags. Air shocks were a factory option on the later C10s. Plus there were aftermarket applications for most vehicles. I'd start with 25 psig and see if they even hold air. The bladders are probably shot.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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#4 |
Registered User
Join Date: Dec 2012
Location: Altoona Iowa
Posts: 481
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Re: Rear air shock psi. with leaf springs 71 C20
Tim your right, I miss read and skipped right to the wrong thing. ....had a brain fart...lol
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#5 |
Registered User
Join Date: Sep 2011
Location: McAlester Olahoma
Posts: 114
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Re: Rear air shock psi. with leaf springs 71 C20
most need 20 to 25 psi.And that is empty. after that more air more load.
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#6 |
Registered User
Join Date: Aug 2010
Location: Edwards, CA
Posts: 7,503
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Re: Rear air shock psi. with leaf springs 71 C20
Do it all the time. Finally to a point where I am not editing everything. The service manual gives a C10 10-15 psig minimum air pressure but not max. Any ideas, it has been so long since I have used air shocks and those were HyJackers on my Vega wagon. Sixteen bags of horse pellets was a pretty good load for that car.
__________________
Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID ** Blazer SPID ** Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders ** Do you have a 1972 Plaid Pickup? ** Plaid Blazer ** Plaid Suburban |
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#7 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: Rear air shock psi. with leaf springs 71 C20
Aftermarket air shocks used to come with plastic (nylon?) air lines and for the life of me I can't remember the maximum recommended pressure, but it seems like it was around 60 psi. My '69 El Camino came with factory air shocks with steel lines. I'm pretty sure they had a maximum rating of 90 psi, and I always ran them at 100 psi. Had to make room for L70-15s on 15x10 chrome rims.
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__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#8 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Rear air shock psi. with leaf springs 71 C20
it is pretty much just a seat of the pants adjustment method/// sometimes i aired them up to 100lbs with real heavy loads or when i wanted to look cool with lots of rake
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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