Hydraulic Cylinder: Piston rod and Cylinder bore scored

Piston rod scored

Scoring of the piston rod is often caused by oil contamination, but this may also be contamination of the gland bearing. If not caught in time then the gland bearing may have failed completely.The gland bearing needs to be checked and replaced if necessary. The entire hydraulic system will need to be flushed and all filters change before re-assembly and re-pressurising.

Cylinder bore scored

Scoring of the cylinder bore can also be caused by contamination of the oil, which may in turn be a sign of piston head bearing failure.The piston head bearing will need to be checked and replaced if necessary. For either failure reason, the entire hydraulic system will need to be flushed and all filters change before re-assembly and re-pressurising.

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