Morehouse Hydraulic Hand Pump Morehouse UCM manual: The hydraulic jack is activated by a two-speed hand pump. It is a dual-volume design based on a double-diameter piston. An auxiliary screw piston (Vernier piston) is provided on the pump for the application of minute increments of force. The pump is connected to the hydraulic jack by means of a hydraulic hose assembly with a quick-disconnect coupling.
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