C-plath Gyro Mk10 Mode 1 annual service
This is a bulk carrier. It was due for annual servicing while ship approx. one year old. New build from China yard. The housing was black in color. No mercury needed for this model of gyrosphere stock no. 074829. Checked the gyrosphere current before switching off for servicing = 237mA, temperature = 46deg. Ph. Bridge = 1 mV. Locate 24Vdc and 230Vac ship supply breaker. Switch off both power supply to cut the power. Allow gyrosphere to spin down for approx. 1 hr. Remove the container by unplug the supply and pickoff connector and lower the housing by lifting and twisting the unit to the right slightly. As usual, allow the old gyro liquid to flow out from the lower nu with red O-ring. Remove the hex screw from upper housing. clean the sphere. Replaced O-ring. Found that gyrosphere current can also be observe from R103. By putting multimeter lead across R103 at master board and measured in AC Volt. The value show in Volt or mV is equivalent to Current in mA. Be careful if you observe gyrosphere keep rotating in anti-clockwise direction, make sure the ribbon cable located on the outside of housing was intact. Also open the housing to make sure no foreign object found inside the sphere. Especially not to use tissue paper to clean the sphere as tissue paper can tear and stick onto the sphere and cause problem after overhaul.
