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10/28/2016

Maintenance of rotary drilling rig (3)

Maintenance of rotary drilling rig (3)


Fault phenomenon
Kelly bar slips down sometimes when it is unloading the soil.

Problem analysis
1.The oil seal of break cylinder has been broken.
2.It caused by the insufficient oil-addition of the main winch.

Handling method
1. Change
2.Connect the oil-addition pipe.

Discriminated method

Open the reducer to add gear oil plug and gear oil is too watery.

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