Crane slewing reducer breathable cap oil how to solve?

Crane slewing reducer breathable cap oil how to solve? 2018 - 07 - 24 rotary reducer breathable cap oil spill is one of the often crane fault, although does not affect the lifting job, but also is very annoying! So how to solve this problem? First trial, after inspection, found that when doing rotary motion from the rotary reducer breathable cap ongoing outflow oil, look carefully you can see is a mixture of hydraulic oil and gear oil liquid. Maintenance steps: first step: determine the cause of the failure ( Basically has the following two) 1, 2, rotary motor oil rotary deceleration braking cylinder seal wear and lead to the second step: the oil untight seal off after downtime prepared to remove the rotary motor first pull down the four screws of the fixed rotary motor, take down the rotary motor, and carefully away the motor output shaft spline, use iron removing cylinder tubing junction; Then launch a car, rotary movement and observe the rotary motor output shaft skeleton oil seal leaks oil. Repeatedly for several times, did not find the leak could eliminate the faults of rotary motor oil. Step 3: pull down rotary deceleration braking cylinder, scored piston observation of oil seal, oil seal has been worn, identified as rotary deceleration braking cylinder oil seal failure cause oil leakage. Step 4: remove the brake cylinder oil seal, replace a new cylinder oil seal and the seal surface thin put some grease, ease of installation. Then according to the installation, remove the reverse order when one by one, tighten the set screw, remove the nails in the brake cylinder tubing plug after installed the tubing. Commissioning normal, troubleshooting.