Friday, January 05, 2007

Air Suspension Hoisting Caution



You might want to think twice about putting that older model vehicle equipped with air suspension on a lift.

As the air spring ages, the rubber degrades. It becomes laced with tiny cracks where the spring is becoming brittle. When you use a four-point lift, the suspension is allowed to drop to its fully extended position. This is not a problem for healthy air springs, but could pose a problem for those that are ready to blow anyway. The air springs will be forced to lengthen and flex folds that haven't been flexed for thousands of miles.

At this point, its a roll of the dice as to whether the spring will support the body again when the vehicle is lowered. So, if you have a drive-on lift with trolley jacks that lift by the suspension (as an alignment lift does), use that whenever possible.

Glen Beanard

2 comments:

Anonymous said...

Good post.

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