7.6 CU. IN. HYDRAULIC MOTOR New, WHITE DRIVE PRODUCTS WP series model 155125F31B1AAAAAA hydraulic motor. The WP series motor incorporates the latest advances for smooth performance, efficiency and durability. Features include an optimized Roller Stator with seven precision rollers, three-zone spool valve, integral check valves, high pressure shaft seal and a provision for a case drain to reduce pressure on internal seals to improve product life.