Marine News: Gear Alignment for a Government Vessel

We just wrapped up an intricate reduction gear changeout and alignment project on a government vessel docked in Miami. We started with strain gage installations on the propeller shafts, following exact drawings to calculate initial bearing loads. Jack-up tests confirmed these measurements, ensuring accuracy before moving forward.

The laser alignment phase involved both main engines and reduction gears, achieving precise tolerances within the coupling manufacturer’s specifications. We overhauled the foundation using Chockfast liners, pouring and curing to prevent any air gaps. Fitted bolts were reamed and machined to exact dimensions, anchoring the reduction gears properly and securely.

Final strain gage alignment ensured bearing loads were balanced, while the Wartsila shaft seals were set for proper runout and compression. By the end, we had everything dialed in, from optimized bearing loads to perfect engine-to-gearbox alignment.

After 30+ years on the job, I can say with certainty that projects like this are a unique challenge, but that’s where the satisfaction comes in.