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My cousin got a four showtime hydraulic pumps like two weeks ago LM cumtoms in Dallas did the installation.Them we took it home and hitted some switches then next day we hit the switches but only one tire lifted.We thought it was the batteries so we went to buy a charger and we charged the batteries and then tryed again but the same thing happen. Is like the pumps are not pushing preassure or something but the motors are spining can some body tell us what is the problem. 