(3) throughout testing, the following should be checked:(a) tightness against oil leakages
(b) temperature of bearings
(c) presence of abnormal noise
(d) power consumption
(e) speed of rot.ation of the drum.7.8.2 On-board acceptance tests and inspections
It is recommended that the following inspections and tests be carried out on board the ship using
ship's power.- Running tests
The winch is to be run for tcn min\ll.es at light-line speed, five minutes continuously in each
direction. Bearing temperature rises must be checked.
7.9 SUMMARY OF RECOMMENDATIONS
The foUowing is a summary of the recommendarions contained in Section 7.7.9.1 Recommendations for ship designers- AU winches should be controlled in the manual mode, including self-lcnsioning winches as
presently designed. - Tn selecting drive systems. the speed-pull relationship for various types must be considered.
- Minimum rated wi nch pul l hould be about 30070 of the line's MBL.
- Minimum rated speed should be selec1ed on tbe basis of ship size, from 0.13m/sec for large
ships to O.lOm/sec for slnall ones. - Minimum light line speed should be O.7Sm/sec., if practicable for the chosen drive system.
- Maximum stall pull should be 50070 of the mooring line's MBL.
- New winch brakes should be capable of holding 80070 of tbe liIle's MBL, with provision for
adjustment to 601170 of the line's MBL. - Winch drums should have a minimum diamerer of 16 times the rope diameter.
- The tension section of a split drum should be wide enough for ten turns of line.
- Winch brakes shouJd be of the fail-safe spring applied type.
- Disc brakes are a good alternative for winch drums.
- For optimum ease, ecurity of operation and manpower re.duclion, ingk drum winches with
full capacity 'fail-safe' input brakes should be considered. - Winch brake testing provisions sbould be incorporated into the winch design.
- The strength of all structural winch components, including drum brakes and deck support,
should be based on the line MBL. Special attention should be given to the cOnnection of the
brake band anchor point to t.he ship's structure. - Wincbes should be clearly marked with the rope MBL for wbich (hey are designed.