Tips for quickly changing excavator cylinder seal kit

The replacement of the excavator cylinder seal kit in the central rotary joint and the oil seal in the boom cylinder on the excavator is time-consuming and labor-intensive, and cannot be quickly replaced and repaired in the field due to the limitations of the site and equipment. Here's a quick replacement tip!

Method:

Replacement of the excavator cylinder seal kit of the central rotary joint

(1) First unscrew the relevant fixing screws, then drag the lower transmission box with a liftable hydraulic trolley, and rotate it to a certain angle, let the trolley lower at the rear, and drag the lower transmission box to one side.

(2) Use the oil breaker to cut off the oil return pipe (to avoid a large amount of hydraulic oil flowing out along the core when pulling out the core of the central rotary joint). Unscrew the 4 fixing screws on the oil distribution pan.

(3) Hang the iron hooks on both sides of the tensioner on the two symmetrical oil pipe joints on both sides of the core; then use the jack to support the vertical drive shaft, and the core can be pulled out while the jack is raised, and the new excavator cylinder seal kit can be replaced.

(4) Use the top sleeve to drag the core of the central rotary joint, and then use a 1.5t jack to push the core back to its original position, and the other parts can be reassembled in the reverse order of disassembly.

The whole process requires only one person to work (also can work together), and there is no need to disassemble any oil pipe. The liftable hydraulic trolley can be refitted with a horizontal jack, or the existing trolley can be used, and the oil breaker can be replaced by a fire glue clip, and the tensioner can be made by yourself. A jack will do it. The whole operation does not require other auxiliary equipment, and the tools used are also very simple, which is especially suitable for quick repairs in the field.