Important spare part used on the impact part of the rock driller. It is made of quality alloy steel through CNC and grinding process with the hardness of up to HRC56-60
Installation instructions (from Sandvik Maintenance Manual)
Detach the rear bearing (1) and distributor (2) from the pilot cylinder (3). Check parts for cracks, seizure marks, and other damage. Minor scratches can be polished with a cloth wheel; grinding is not allowed. It is recommended that the rear bearing be replaced every 2000 percussion hours.
Place the 0-rings in their grooves in the rear bearing and the pilot cylinder.
Lubricate the seals thoroughly, and soften them carefully with your fingers. Alternatively, soften the seals in warm oil or water (max. +50 °C). Install the piston seals in their grooves in the rear and front bearings.
Place the rear bearing and the distributor into the pilot cylinder. Check that the distributor is the right way round.
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