A fluid motor comprising a housing including first and second cylinders. First and second pistons are rigidly fixed to each other and situated in their respective cylinders. First and second flexible seals act to seal between the pistons and their respective cylinders. The housing has an inlet port for receiving working fluid and first and second outlet conduits for exhausting the working fluid. The motor also includes a working fluid valving means for alternately providing pressurized working fluid to the cylinders, including a single spool valve adapted to alternate between first and second positions, and means for moving the working fluid valving means between the first and second positions.