Brake Rendering Testing

Brake Rendering Test

PROCEDURE

1. Brake rendering testing is to be carried out under the supervision of a responsible Officer designated by the Master.
2. Carry out a visual inspection of the brake band and any damage or failure should be rectified before any testing takes place.
3. Refer to the ‘Mooring winch manual’ for correct procedure of rigging the brake testing kit which can be different for various vessels.
4. Calculate ‘Jack Force and actual pressure required at hydraulic jack’ to reach ‘Brake Rendering Force’, at the first layer as per the formula provided below.
5. Keep wooden grating or metal plate under hydraulic jack to uniformly spread weight.
6. Tighten the winch brakes and apply hydraulic jack pressure.
7. If slippage occurs at a pressure less than designed, the brake should be tightened & jack test reapplied.
8. If the recorded pressure corresponds to the design pressure the jack should be released and the test gear removed.
9. If slippage does not occur at the design pressure, the brake setting should be adjusted so the brake can render at design load.

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