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03-09-2012, 03:18 PM
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Hummer Veteran
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Join Date: Feb 2012
Location: Connecticut
Posts: 74
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Tonneau Cover Gas Lift Springs
Not sure if this has been tackled or not but I couldn't find anything through search.
Does anyone know the proper newtons rating for the OEM Tonneau's lift springs. Mine has a "550" engraved on it but nothing else. I tried to cross reference the stock numbers with an aftermarket pair. Without the lift rating I really can't buy a proper set. Any help would be appreciated. Thanks
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03-09-2012, 06:04 PM
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Hummer Professional
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Join Date: Nov 2009
Location: Windermere, FL
Posts: 297
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Re: Tonneau Cover Gas Lift Springs
Not sure how "proper" they have to be, but you can go to your local parts store and just start comparing what they have. Also, they don't have to be an exact match.
__________________
White 2005 SUT, Lifted 7.5" via Fabtech/custom work, Fabtech Dirt Logic 2.25 shocks, 40x15.5x22 Toyo's, black 22" Fuel wheels, 4.88 gears, Dynatech long tube headers, Magnaflow exhaust, Air-raid intake, Superchips programmer, Edlebrock panhard bar, Cognito UCA's, Kryptonite tie rods, Cognito pitman/idlar arm gussets, Hotchkis swaybars and trailing arms, Amp Research steps, E&G fender flares, PIAA SMR's, smoked roof lights (bulbs removed), black suede headliner, 13" JL's under seat
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03-09-2012, 06:51 PM
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Hummer Veteran
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Join Date: Jan 2011
Posts: 166
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Re: Tonneau Cover Gas Lift Springs
mine are almost shot also.they barely hold it open. i will probably just get some that are the right length and slap them on. it wont hurt if they are a little stronger than stock.
__________________
06 H2 SUT
-gobi ranger rack
-4 piaa 520
-hummer double brush guard
-vision x rock lights
-5%tint all around
-dual "whips"
-leveling kit
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03-09-2012, 07:19 PM
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Hummer Veteran
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Join Date: Feb 2012
Location: Connecticut
Posts: 74
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Re: Tonneau Cover Gas Lift Springs
Had an impatient morning in the office so mathematically figured it out by the weight of the cover. They should be around 120 pounds each to get the "lift" they are intended to do. If you just want it to hold the cover in place you will need significantly less.
Thanks for the responses though guys.
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03-09-2012, 07:37 PM
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Hummer Professional
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Join Date: Nov 2009
Location: Windermere, FL
Posts: 297
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Re: Tonneau Cover Gas Lift Springs
I replaced mine with some that were stronger. It would pop up almost too quickly at first, but they've worn out a bit since.
__________________
White 2005 SUT, Lifted 7.5" via Fabtech/custom work, Fabtech Dirt Logic 2.25 shocks, 40x15.5x22 Toyo's, black 22" Fuel wheels, 4.88 gears, Dynatech long tube headers, Magnaflow exhaust, Air-raid intake, Superchips programmer, Edlebrock panhard bar, Cognito UCA's, Kryptonite tie rods, Cognito pitman/idlar arm gussets, Hotchkis swaybars and trailing arms, Amp Research steps, E&G fender flares, PIAA SMR's, smoked roof lights (bulbs removed), black suede headliner, 13" JL's under seat
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03-10-2012, 02:47 AM
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Hummer Professional
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Join Date: Oct 2007
Posts: 267
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Re: Tonneau Cover Gas Lift Springs
Given the information in this thread I would probally come to the conclusion that they are 500N type when you divide the approx 120 lift to be 54.5 KG you would also have to calculate overall length and circumference and know the variables. Temperature will always affect the lift pressure.
(You wont need to do the calculations and pay for custom building)
http://www.car-stuff.com/mmparts/hum...unk_strut.html
__________________
2003 H2 SUV Supercharged SHOW TRUCK
2013 Sierra Denali
2012 Yukon Denali
1974 Corvette conv. (454ci)
31ft Gulf Craft Boat
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