7.Installation of Gearboxes

• The installation of gearboxes can be generally divided into two ways. one is to pour them into concrete using secondary grouting after clear positioning. and the other is to pour a piece of iron plate containing threaded holes. to fix the gearbox in concrete through the threaded holes.
• The second method, the gear contact surface need inspected after finishing the fastening of the foundation bolts. Because of the deflection of the gearbox itself and the corresponding support parts. the gearbox is bound to be deformed, and the contact effect of the gear surface is easily affected. As a result, the clearance at the base bolt position need checked and shims or removed to adjust the bolt contact. This process requires repeated loosening and tightening of the bolts. and since the gearbox itself is strong, the corresponding corrections are usually small. After confirming that the bolts are tight and the teeth are in good mesh. next commissioning work carried out.

8.Initial Inspection and Oiling

Before installing the gearbox, it is usually empty. so it is necessary to inspect the inside of the gearbox and add the appropriate amount of oil. Although the gearbox nameplate has indicated the grade and quantity of lubricant . at face, the initial lubricant should be some what higher than the standard. And the anti-rust oil that comes with the gearbox from the factory can be compatible with the lubricant. so in order to avoid impurities entering the box. no more tank cleaning work and attention to the use of the corresponding filtering device when adding lubricant.

9.Pre-start Inspection

Before starting the gearbox, the inspection must be comprehensive and meticulous. and the main inspection items are as follows:

• Confirm the correct lubricant and oil level in the tank;
• Inject lubricant;
• Confirm the alignment condition of the shaft coupling;
• Check the connection status of the main and auxiliary pipelines;
• Inspect the tightening status of the foot bolts and box bolts;
• Confirm the tooth surface by moving the gearbox.

10.No-load Commissioning

Start the equipment under no-load condition. first of all, the gear lubricant supply and pressure should be clarified. if the pressure is incorrect, the equipment should be shut down and checked immediately. after that, check the oil temperature, if the oil temperature is too low or too high. focus on controlling the flow of cooling water. to ensure the oil temperature at 120-140 °F. after the oil temperature returns to normal state . After that, need to confirm whether the oil pressure state is normal.

11.Load Debugging

Run the gearbox under light load to confirm the lubrication status. and then focus on monitoring the bearing position. if there is a rapid rise in oil temperature. which means that there may be problems with the bearings. it is also necessary to stop and check, and run the gearbox under full load. to confirm whether there is any abnormal noise, vibration. or abnormal changes in bearing temperature and oil temperature. which should be below 140 °F.