At 06:05 PM 12/28/2015, Michael McSwain wrote: >drivers side up a bit to get the wheel back on, (both sides were on jack >stands sitting on a square of 2x6 lumber), and as I raised the drivers side >the van shifted past the tipping point of the remaining jack stand and down >it went. On nice flat concrete the original jack seems ok. On anything The stock jack provides -- *by design* -- ZERO horizontal stability. It is absolutely on you to chock wheels on every use. Why is this a good thing? Two reasons. First, you're supposed to chock the wheels when you use a jack. This one doesn't give you false peace of mind that this time you can get away without using chocks. But the second reason is the important one. Because the jack rotates freely in the jacking point, if you are forced to use it on a hill you can place the jack vertical instead of perpendicular to the hill. With the jack vertical, all of your jacking force is lifting directly against gravity, instead of having a horizontal component that is trying to roll the van ahead or astern. Yrs, d |
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