Gr8 advise Les B.:
You are serving your fellow GMCers very well! Keep up the good work!
Mike/The Corvair a holic
Sent from my iPhone
>
> Several years ago, I purchased a 10,000lb two post lift for my garage. Before doing so, I spent a good amount of time researching lift failures and the causes. In most failures, the reason is either lack of monthly maintenance, or poor load management. Rarely is it the fault of the lift design.
>
> Monthly maintenance consists of lubrication, inspection of high wear items, and re-torquing the anchor points. Failure of the anchor points is a common occurrence that causes the common “column spread” or “toppling” that is reported.
>
> On my lift, I check the anchors for torque monthly, or prior to lifting my 8000lb pickup. It is shocking how often I find an anchor slightly loose. One anchor would not pull the recommended torque after a couple years of use, so I had to repair it using a special replacement anchor that uses anchoring epoxy. Now that anchor is the only one that I never find loose.
>
> Load management is another commonly ignored task. A 10,000lb lift is rated to carry 2500lbs per arm. My 8000lb diesel pickup has very close to 5000lbs on the front axle. This puts the front arms at their max rating. Loading my truck just 6-8” too far forward has the potential to exceed my lift’s rating per arm. Knowing the Center of balance is important when approaching max capacity of your lift. Another often overlooked issue is lifting severely unbalanced loads where most of the weight is carried on the 2 forward(or 2 rear) arms. This greatly stresses the anchor-points.
>
> So imagine this:
> Using a 15000lb 2-post lift to raise your 26’ GMC coach that weighs +/- 12000lbs. Most of us haven’t a clue where the Center of balance is, and that center point can vary substantially depending on cargo and how it is placed. Just 12” too far from Center of balance can put the lift capacity over limit.
>
> Do your homework and ask lots of questions before potentially making a bad purchase and risking your safety.
>
> Les Burt
> Montreal
> '75 Eleganza 26'
>
>
>>
>> To add to those promoting my "service rack", "grease rack", or whatever
>> name it should have, let me say that at one time or another I've tried all
>> of the various racks, lifts, pits, etc., mentioned and can honestly say
>> that I wouldn't trade it for any of those. Here's some information about
>> it (ignore the cluttered shop photos, but be sure to read the multimedia
>> pdf):
>>
http://www.gmcmhphotos.com/photos/g4271-ken-5c-27s-shop-26amp-3b-grease-rack.html
>>
>> Major benefits of my fortuitous design are: Its cost (trivial). Its
>> convenience since one can sit down for most tasks, yet stand for things
>> like wheel service that require "on the floor" work with a pit. It's open
>> and airy, with no accumulation of fumes or liquids like with a pit. It's
>> especially well suited for those whose site has a slight incline.
>>
>> Everyone who's seen and worked at my site is enthusiastic about it. Manny,
>> went home and expanded his shop to include a similar rack. Vern Crawford
>> came home with me today from Tallahassee to see it and is already "in
>> love".
>>
>> I take little credit for the design since it just "sort of happened", but I
>> am REALLY proud of it.
>>
>> Ken H.
>>
>>
>> On Tue, Mar 26, 2019 at 10:18 PM Stu Rasmussen (97381.com) via Gmclist <
>>
>>>
>>> Greetings all -
>>>
>>> I am in the very preliminary stages (the 'dream' stage) of building a
>>> workshop that will also be suitable for working on vehicles.
>>>
>>> Now that I have acquired a 26 foot motorhome the dimensions of the dream
>>> are altering somewhat.
>>>
>>> Although the (now larger) building cost will be an initial hurdle,
>>> eventually I'd want to add a vehicle lift of some sort, and that leads
>>> to the question of the day: You can put a 4-post lift onto an average
>>> strength concrete floor but a 2-post lift requires a bit of pre-planning
>>> and foundation concrete work to provide sufficient 'meat' to properly
>>> anchor a lift.
>>>
>>> So, the question is, can a GMC motorhome be lifted on a suitably sized
>>> 2-post lift or do I need a larger footprint 4-post? Can it be lifted
>>> most anywhere along the frame (presuming the lift posts are at the CG of
>>> the motorhome) or only at the designated lift points?
>>>
>>> Thanks in advance for any advice -
>>>
>>> Stu Rasmussen W7QJ
>>> Silverton, OR
>>> 74' gutted Eleganza
>>>
>>>
>>>
>>>
>>>
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