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Lift struts/gas spring install on 1982 Grandby, keep rain gutter too


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#11 Vic Harder

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Posted 25 November 2016 - 09:57 PM

OK, maybe this should go into the "dumb things you have done thread".  The front struts didn't work as mounted.  By placing the mounts as far apart vertically as possible to maximize their lifting strength, I ran into some crazy geometry.  If you measure the 19.75" in the closed position and install (like I did for the rear) then the shocks are not long enough when fully extended to allow the roof to go all the way up.  If you mount them so that the roof can go all the way up, there may be less than 19.5" between the mounts, which means the roof can't go all the way down.

 

Ask me how I know, I dare you.   :blink:  

 

There is a reason FWC puts the lower mounts about 2" up from the bottom. :huh:  The geometry then works much like it does on the back wall... with about 3" vertical separation between the mounts. 

 

I re-positioned mine a few times, and checked lengths when up and down before drilling the 3rd set of holes.  Check where that will put the holes on the inside by the mattress too.  You want them to be below where the carpet attaches do you don't damage the lifting mechanism.  Just sayin'

 

Works now.  :D


Edited by Vic Harder, 25 November 2016 - 09:58 PM.

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#12 ski3pin

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Posted 26 November 2016 - 12:16 AM

I won't take the dare :)


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#13 Trowbocop

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Posted 22 March 2017 - 02:54 AM

Thanks for all of the valuable pics and info to everyone here. Going to be installing mine soon!


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#14 Trowbocop

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Posted 22 March 2017 - 04:50 PM

Reviving an old thread here, I know. But does anyone think these would be too weak to mount 40# struts with?

 

Ameritool BR-3300-32 Stainless Steel Short Flat Bracket

2.5" long .75" wide

10mm Ball Stud

 

Thanks in advance!


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#15 HughDog

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Posted 23 July 2019 - 07:10 PM

OK, maybe this should go into the "dumb things you have done thread".  The front struts didn't work as mounted.  By placing the mounts as far apart vertically as possible to maximize their lifting strength, I ran into some crazy geometry.  If you measure the 19.75" in the closed position and install (like I did for the rear) then the shocks are not long enough when fully extended to allow the roof to go all the way up.  If you mount them so that the roof can go all the way up, there may be less than 19.5" between the mounts, which means the roof can't go all the way down.

 

Ask me how I know, I dare you.   :blink:  

 

There is a reason FWC puts the lower mounts about 2" up from the bottom. :huh:  The geometry then works much like it does on the back wall... with about 3" vertical separation between the mounts. 

 

I re-positioned mine a few times, and checked lengths when up and down before drilling the 3rd set of holes.  Check where that will put the holes on the inside by the mattress too.  You want them to be below where the carpet attaches do you don't damage the lifting mechanism.  Just sayin'

 

Works now.  :D

 

Hey Vic -

 

I recently installed two back struts with some preload as suggested throughout this trail, and it kinda makes me wonder if all of the load is on struts vs. the lift panels inside.  I noticed that hoopytank shot in 5 screws on each mount with the suggested preload.

 

My question is:   Have you had any issues (i.e. mount loosening) by using two screws on each mount?  I'll likely do two or three screws  for each front mount if your setup has remained solid with preloads on each strut.  


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#16 Vic Harder

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Posted 23 July 2019 - 07:24 PM

nope, everything is still tight and working well


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2006 Silverado 3500 ext cab 8' bed LBZ, FASS, EGT delete, 5" exhaust, FTE Resonator, MotorOps 50 HP Tow Tune, Lightwerkz.net HID projector Headlights, Edge Insight CTS2

2012 ATC Puma, BattleBorn LiFePo4, Victron MPPT and BMV, AIMS 3000W inverter, Induction cooktop... loving it... 


#17 HughDog

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Posted 23 July 2019 - 07:36 PM

Perfect!  Just the feedback I was looking for . . . I don't have a ton of wiggle room up front (mainly the top) and can easily work with that setup-

 

Thanks 


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