|Alatas Service||Field Service, Afloat Repairs|
|Location||Zhen Jiang Port, China|
|Vessel Type||Bulk Carrier|
|Model||Combined Anchor & Mooring Windlass |
253 kN / 147 kN
Alatas Shanghai was contracted to carry out these Kawasaki anchor windlass repairs. Our customer informed Alatas Shanghai that the main shaft of the chain drum (including the gypsy wheel and cable lifter) and bearing bush had worn out. Alatas Shanghai then mobilised its afloat team for urgent repairs.
Neither a new shaft nor a new bearing bush for this Kawasaki 253 kN / 147 kN windlass was available onboard as the spare components had to be supplied or fabricated. This meant that the Alatas asked the crew to measure the bush’s raw dimensions so that a new bush could be manufactured before the afloat repair team arrived at the vessel.
With the new bush fabricated, an Alatas windlass specialist attended in the vessel in port. After dismantling the bearing assembly, our specialist found that the gypsy wheel shaft was also worn down. Our specialist recommended that either a new shaft should be supplied or, at the very least, that reconditioning on the existing gypsy wheel shaft equipment should be performed onshore by the repair team.
Our customer had only 1 ½ days available for these repairs, so the second option of emergency repair and reconditioning was chosen by the repair team and customer. Our repair solution consisted firstly of grinding the worn shaft section and then fabricating a new bronze bush. This work was then machined to size and to tolerance to fit the reworked shaft.
We pride ourselves on the adaptability of our Merchant Shipping services to keep our client’s operations running smoothly. If you require assistance regarding your anchor windlass, deck machinery or anything else, please Contact Us to find out more.
- Dismantled the bush bearing bracket
- Grinding of the top side of the shaft, as the bush bearing was found stuck with shaft and turning together
- Used the top side bush bearing turned to downside, then grinding the downside of the shaft.
- Measured the shaft diameter, informed workshop to fabricate the bush bearing according to the measurement and as per maker’s tolerance
- Installed the new bush bearing, tested with C/E on board. All in good condition with no abnormal noise or vibration was found during testing.
- Repair recommended the shaft during next drydock