Air hazards

    Hydraulic system of the hydraulic crane assembly and repair process, because the air in the hydraulic system hazards lack of knowledge , not fully exhaust the air from the inside into the hydraulic system , especially when a large volume of air into the cylinder , the crane lifting operation , the cylinder will emit a sharp noise , excessive vibration , or sometimes can be seen creeping phenomenon . Crawling is an scissor pallet truck harmful fault performance .
    A lot of air into the hydraulic system when the truck crane braking at high speeds condition , crane booms because of inertia sprang serious affect driving safety , leading to hook fixtures crack and damage , collision damage pulleys , etc. accidents. Channeling arm hydraulic truck cranes, which are almost always used telescopic circuit shown in Figure 2-15 jib telescopic mechanism hydraulic circuit . Boom cylinder rod chamber together with the system loop piping directly connected , A -side pressure is zero . In the no-load driving conditions , the cylinder rod chamber is usually free of oil, filled with air , if the loop is not immersed in the Hand pallet jacks tubing parked in channeling arms prone to the phenomenon . When the cylinders are filled with oil oil chamber , you can avoid the phenomenon of channeling arms .