1. Purpose and Type of Hand Pump
Generally uses for pressure testing of hydraulic elevator, press device, hydraulic system, or elevator manual operating for emergency stop. By installing relief valve (safety valve), these can be used in high pressure and be able to select manual valve for releasing pressure.
Internal diameter of suction pipe has to be at least 8 mm and hand pump and pipe connection have to be sealed completely. If possible, it is better to attach filter on the suction pipe.
3. Air Bleed
In order to operate hand pump's lever freely as possible, unscrew air-bleed-screw halfway then pumping until oil is coming out through to the thread after install hand pump.