Portable 40,000-lbs. lift Gray Manufacturing Co. has introduced a new, portable wheel-lift system capable of lifting up to 40,000 lbs. Because of its portability a dedicated bay is not required, and it can also double as a support stand in raising just one end of a vehicle 30 in. The Model WL-40 system is operated on "shop air," and at a 40,000-lbs. capacity able to accommodate wheelbase diameters from 14 in. to 24.5 in., is capable of lifting motorhomes, fire apparatus and military equipment.