| 摘要 |
A high lift tag axle for a concrete mixer truck or the like is pivotally attached to the rear of the truck through a pair of tag arms each having a lever arm, with a linkage arrangement interconnecting each lever arm to the truck frame, and a hydraulic cylinder connected to said linkage arrangement to align the linkage arrangement in a plane sufficient to lock the lift axle in a downward position where the wheels engage the road surface, and whereby the hydraulic cylinder can pivot as the linkage arrangement sufficient to pivot the tag axle into a position whereby the wheels are raised off of the road surface.
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