nord B 1050, Operating And Assembly Instructions Manual

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Industrial gear units – Operating and Assembly Instructions
76 B 1050 en-4419
5.2.10.3 Drying agent filter (Option: DB)
The drying agent filter uses silica gel as the filter material. The condition of the filter is visible from the
outside. With increasing contamination the colour of the filter material changes from blue to pink. The
colour change starts in the lower area and spreads to the upper area The filter should be replaced
when three quarters of the filter have changed colour.
1. Check the degree of contamination.
2. Optional: Unscrew the old ventilation filter.
3. Optional: Screw in the new ventilation filter with a new sealing ring (please see chapter 7.4 "Screw
tightening torques").
5.2.11 Replacing the shaft sealing ring
Replace the shaft sealing ring
Once the shaft sealing ring has reached the end of its service life, the oil film in the region of the
sealing lip increases and a measurable leakage with dripping oil occurs. The shaft sealing ring must
then be replaced. The space between the sealing lip and the protective lip must be filled
approximately 50 % with grease on fitting (recommended grease: PETAMO GHY 133N). Take care
that after fitting, the new shaft sealing ring does not run in the old wear track.
Information
Special installation rules must be observed when replacing MSS7 seals in order to achieve a normal
operating life. MSS7 seals are two-part seals which consist of a liner with an axial dust lip and a radial
shaft sealing ring with a radial dust lip (Figure 30: MSS7 seal). Please contact the NORD Service
department in case of any queries.
Legend
1: Bushing
2: MSS7 seal
3: Shaft
Figure 30: MSS7 seal