Seals, Seal sets

Function

Their basic function is to prevent the leakage of oil between the cylinder and the piston of the hydraulic hammer (impact seals) and, in some hammer models, the leakage of gas from the cylinder head (gas seals). Also, they ensure the tightness of all holes, joints, etc.

Maintenance

The usual service life is about 500-600 working hours. After this period, they need to be replaced as a preventive measure. In practice, they are most often changed when they lose their function, sometimes even after more than 1000 working hours. Seals must be changed after opening the hammer, regardless of their visual condition.

In addition to the wear of the seals during operation, the seals can also be damaged by: excessive oil flow, too high working pressure (unadjusted overpressure valve on the excavator), contaminated hydraulic oil, too high temperature of the hydraulic oil, laying the hammer in a horizontal position for a long time.


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