J—ZH机油滤清保养指示器已于1976年通过了鉴定。这种指示器安装在J0810型机油滤清器滤座的旁通阀位置上,以代替旁通阀的一种指示装置(见结构简图)。该指示器适用于使用J0810型机油滤清器的495、490、390型柴油机。在发动机工作过程中,当机油滤清器的滤芯堵塞,滤芯前后的压力差逐渐增加到1.5～2公斤/厘米~2时,下触点5压缩承压弹簧4,向上移动和上触点3接触,电路接通,指示灯亮,提醒驾驶员及时保养(或更换)滤芯,可以防止未经滤芯过滤的脏机油进入 J-ZH oil filter maintenance indicator passed the appraisal in 1976. This indicator is mounted on the bypass valve position of the J0810 oil filter cartridge in place of a by-pass indicator (see schematic). This indicator is for Model 495, 490, 390 diesel engines with J0810 oil filter. In the engine work process, when the filter oil filter blockage, the pressure difference before and after the filter gradually increased to 1.5 ~ 2 kg / cm ~ 2, the lower contact pressure compression spring 5 5, the upward movement and the contact 3 Contact, the circuit is connected, the indicator light, remind the driver to maintain (or replace) the filter in time to prevent dirty filter oil filter