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一、液压千斤顶液压千斤顶的故障通常有空顶不起、重顶不起、顶不高、漏油四种。(一)液压千斤顶空顶不起液压千斤顶在没加载时,顶杆就升不起来,其原因如下:①千斤顶内无油;②进出油活门附近有空气;③回油阀(或杆)关闭不严,④进出油活门关闭不严;⑤中央皮碗损坏或脱落;④小皮碗损坏或脱落;⑦小活塞杆筒体端面与结合密封垫损坏。当出现千斤顶在没加载时(空打时),中央顶杆就升不起来,要首先检查千斤顶内有无油,如无油或缺油应加足。若千斤顶内有油,可将千斤顶回油阀(针)松开,将加油孔螺丝御掉,然后用脚踩住千斤顶底座,用双手向上拔起中央顶杆,再压下去,反复作几次(如果活门附近有空气,这样就能将空气排除)。做完上述动作后,将加油孔螺丝上紧,再将回油阀(针)扭紧(暂不上加油孔螺丝),再试空顶,如果此时中央顶杆能顺利上升,说明活门附近
First, the hydraulic jack hydraulic jacks are usually the top of the fault can not afford, can not afford to top, the top is not high, oil spills four. (A) the hydraulic jack can not afford to empty the top of the hydraulic jack in the absence of load, the jack can not rise, the following reasons: ① jack no oil; ② out of the oil near the valve with air; ③ return valve (or lever) closed Not strict, ④ closed the inlet and outlet valves lax; ⑤ central bowl damaged or off; ④ small bowl damaged or off; ⑦ end of the small piston rod cylinder with a combination of seal damage. When the jack is not loaded (empty play), the central jack can not rise, first check whether there is no oil jack, such as no oil or lack of oil should be added enough. If the jack has oil, you can release the jack return valve (needle), the oil hole screws out, and then foot jack jack base, with both hands, pull up the central plunger, and then pressed down, repeated several times (If there is air near the valve, this will eliminate the air). After doing the above action, tighten the oil hole screw, and then tighten the oil return valve (pin) (temporarily not on the hole screw), try the top again, if at this time the central ram can be successfully increased, indicating near the valve