H4-DH-16-D a distinction is made between The shaft misalig Helical gearbox H4

Flender/Flender Gear Units/Helical gearbox H4

illing screw of the backstop. 3.Fill the amount of oil that is specified on the backstop plate. Use the same oil type and oil viscosity as for the gear unit itself. Use filling filter with the same filter mesh size as for the gear unit itself. 4.Screw in the oil filling screw. 8.3.3 Replacing the backstop 8.3 Maintenance and servicing work Introduction If you operate the gear unit at speeds below the disengagement speed of the backstop, then you must arrange for the backstop to be regularly replaced by Customer Services. The replacement intervals are provided in the dimension drawing and on plate attached to the gear unit. This plate is attached to the gear unit housing close to the backstop. Procedure Proceed as follows to replace the backstop: 1.Contact Customer Services promptly so that the backstop can be replaced by the spe- cified deadline. 2.Arrange for Customer Services to replace the backstop. 3.Fill the new backstop with oil. 8.3.4 Cleaning the fan and gear unit 8.3 Maintenance and servicing work Introduction The gear unit can sustain damage due to inadequate cooling if you operate it with dam- aged or soiled fan. Depending on the conditions at the site of installation, it may therefore be necessary to clean the fan and gear unit more frequently than stipulated in the maintenance schedule. Servicing 8.3 Maintenance and servicing work B5-0 en Edition 0/2 7Take appropriate measures to ensure that the shaft seals do not come into contact with cleaning agents. Procedure Proceed as follows to clean the fan and gear unit: 1.Remove the air guide cover. 2.Use hard brush to remove any stubborn dirt from the impeller, air guide cover and pro- tective grille. Never use high-pressure cleaning device. 3.Remove any spots of corrosion. 4.Reinstall the air guide cover. Make sure that the air guide cover is correctly fastened. Ensure that the fan does not come into contact with the air guide cover. DANGER An explosive atmosphere can be ignited An explosive atmosphere