Answer: (1) Overhaul of the main engine and gearbox:
1) Replace the main engine rotor rotating bearing;
2) Replace the main engine rotor mechanical shaft seal and oil seal;
3) Replace the main engine rotor adjustment pad;
4) Replace the main engine rotor sealing pad;
5) Adjust the gearbox gear precision clearance;
6) Adjust the main engine rotor precision clearance;
7) Replace the gearbox main and auxiliary rotating bearings;
8) Replace the gearbox mechanical shaft seal and oil seal;
9) Adjust the gearbox precision clearance.
(2) Grease the motor bearing.
(3) Check or replace the coupling.
(4) Clean and maintain the air cooler.
(5) Clean and maintain the oil cooler.
(6) Check or replace the check valve.
(7) Check or replace the pressure relief valve.
(8) Clean the water-gas separator.
(9) Replace the lubricating oil.
(10) Clean the heat dissipation surfaces of the unit.
(11) Check the working condition of each electrical component.
(12) Check each protection function and its setting value.
(13) Check or replace each pipeline.
(14) Check the contact condition of each electrical component.
