What is the crane rocking test procedure?

asked 16 Apr, 02:25

KnowledgeBase's gravatar image

KnowledgeBase
66254298387
accept rate: 0%


alt text

The slewing bearing rocking test should be done periodically for the bearing wear tracking and early failure detection.
The measurement could be done from the inside and outside of pedestal. Follow the maker's recommendations and conduct the test at the same check points as during the initial test during commissioning in order all subsequent measurements have the same reference 0.

The measurement should be done as follows:

  1. Two checkpoints should be chosen on the pedestal at the circumference close to the revolving side shell of the crane (see the drawing above) normally at the FWD and AFT of pedestal. Some makers recommend to carry out measurements at four points: FWD, AFT, PORT and STBD of pedestal. Measurement points normally marked at the pedestal.
    alt text
    Note a reference metal bar welded to pedestal at measurement point
  2. Measurement should be done by depth meter at four directions of boom: FWD, AFT, PORT and STBD. At each boom direction two or four readings must be taken (see item 1 above), check maker's recommendations for details. Record obtained figures on the log sheet. Result of periodic measurement record should be compared with the max. allowable deviation provided by the manufacturer.
    alt text
  3. Some rocking test procedures require to use a dial gauge instead of depth meter.
    alt text
    In this case dial gauge set to 0 after installing at the measurement point and readings taken at four boom positions: FWD, AFT, PORT and STBD. Same procedure repeated for all measurement points as it was done during initial the rocking test.
permanent link

answered 16 Apr, 05:08

cheng's gravatar image

cheng
561510
accept rate: 0%

edited 16 Apr, 05:19

add your answer

Related questions

MarineProHelp 2018.