01-05-2012, 09:26 PM
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#9
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Vintage 4x4s
Join Date: Sep 2010
Location: Prior Lake, MN
Posts: 4,305
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Re: "hook lift" on a C60
Interesting, lots of engineering involved there. You can figure out all the pivots on paper with a compass and ruler and grid paper. Google 4 bar mechanism design (pivot point method) This takes me back. Years ago, I wrote a computer program to calculate the pivots for 4 and a special types of 6 bar mechanisms to get it right before anything is built but the problem is getting all the inputs (box size, truck frame length, range of heights you can put pivots on truck frame. Then of course all the other calc's to size the pivots, grade of steel, size of steel, etc.
Looks like the main advantage is the box doesn't slide or roll off when loaded/unloaded.
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67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades)
67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore  )
86 CHV K30 502 th400, apple red NEW
71 CHV K20 350 SM465, ochre (saved work truck)
71 CHV K20 292 SM465, white, tach, PTO, (future project)
72 CHV K20 350 350th, medium blue (project stocker)
01 CHV K2500hd crew, indigo blue
^3 dont run and the others don't see winter either
'86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649
'71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642
'72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6
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