Power Steering Pumps -: Description

Thompson power steering pump is a belt driven, slipper-type assembly with integral reservoir. Pump can be identified by small round filler neck, welded to reservoir. Reservoir is attached to rear of pump housing front plate, and pump body is encased within reservoir. Spring loaded slippers in pump are in constant contact with eccentric, inside diameter of pump housing. As rotor revolves, slippers force fluid from inlet side of pump to flow to control valve. Maximum pressure in system is regulated by pressure relief valve. Valve opens once maximum pressure is reached, thus allowing fluid to flow back into reservoir.