About using the knapper hydraulic oil black after the cause and the treatment scheme

About using the knapper hydraulic oil black after 2021 - the cause and the treatment scheme 03 - After installation knapper 07 drivers to use for a period of time, the phenomenon of the hydraulic oil black, the main reason for the hydraulic oil black are: 1. Knapper filling grease method is not correct. Must be in the condition of drill rod by the filling grease. （ As shown in the figure below) Note: grease only within the knapper front shell of drill rod and guide sleeve for lubrication, reducing wear and tear. Not pressure filling grease, if drill rod, the clearance between the sleeve and grease will follow the drill rod up to hit the cavity, when a large number of sticking to the grease oil seal, piston and cylinder grease will follow the movement of the piston into the hydraulic system, hydraulic oil pollution, reduce the hydraulic oil lubrication, or damage to the hydraulic system. 2. Use inferior hydraulic or not on time to replace the hydraulic oil and hydraulic oil filter, are more likely to cause the hydraulic oil. As shown in the figure below: 3. The respiration valve, Air check valve) Damage to its working principle is: the piston in the moment breather valve column strongholds in the top row to the seal gas, gas and dust blow cavity with downward to the strike of the cavity; Contact with the inner sleeve on the pistons, drill rod seal gas, produced by negative pressure from breathing valve into the air. If breathing valve damage and its interlinked hole blockage, at this time because the strike will cause the negative pressure in the cavity of grease and dust caused by hydraulic oil into the cylinder as the piston upward, led to the black oil. Air check valve on the cylinder body are located as shown in the figure below: 4. Knapper at work requires a lot of hydraulic oil loop back and forth, drivers in black oil (hydraulic system of casting Commonly seen) 。 After about using knapper hydraulic oil blackening treatment scheme 1. According to the crushing machine working time to replace the hydraulic oil and hydraulic filter on a regular basis. 2. According to the specific provisions of the specification, and replacement of broken round bushing retainer and drill rod bushing, avoid the bushing wear, severe damage to the piston and the drill rod hydraulic oil pollution. 3. Time as stipulated in the instruction manual replacement of broken seal, in order to protect the knapper piston and cylinder; Before cleaning shells hit the cavity; Replace air check regularly, check the air check valve through the hole to see if there is grease, ensure unblocked.