NORD Drivesystems Berges-VG - Manual (Page 20)

6 Servicing and maintenance
6.1 Servicing intervals
Stop!
Please complay with the servicing intervals for all drive components. ( Variable-speed
pulley, wide V-belt, gear box and motor )
Damages to the variable speed gear VG should be avoided.
Check for damages regulary.
ƒ Variable - speed pulleys and spring pulleys feature at lifetime grease lubrication
system and thus require virtually no maintenance. However, it is advisable to clean
the drive on the occasion of general machine cleaning ( inspection ). Shorter clea-
ning intervals will be required if soiling is heavier.
ƒ Wide V-belts are subject to natural wear:
- Inspect the wide V-belts occasionally for wear, fractures and cracks and exchange
or replace them if necessary.
- Belts should be replaced every 6.000 working houres .
6.2 Servicing work
6.2.1 Changing the wide V-belt
Stop!
Should it be necessary to replace the belt, please use only original BERGES
wide V-belts, Type CW-B!
Berges Wide V- Belts are antistatic according to ISO 1813
Removal procedure for U version ( see also Figure 3, Page 12 )
ƒ 1. Switch on the drive and accelerate it to maximum output speed. Then switch
off the drive and disconnect it from the mains.
ƒ 2. Undo the casing voltage connections ( Item 3.1 ), ( 4, 6 oder 8 bolts depen-
ding on drive size ) and remove the halve of the casing ( Item 4 ).
ƒ 3. Fully open variable-speed pulley R ( Item 1 ) and detach the wide V-belt ( Item6 )
over the front edge of the variable-speed pulley R ( Item1 ) and by turning the
variable-speed pulley and spring pulley by hand.
Removal procedure for Z version ( see also Figure 4, Page 12 )
ƒ 1. Switch on the drive and accelerate it to maximum output speed. Then switch
off the drive and disconnect it from the mauns.
ƒ 2. Undo the casing connections ( Item 3.1 ), ( 4, 6 or 8 bolts depending on drive
size ), move the half of the casing ( Item 3 ) adequately away from the other half
of the casing ( Item 4 ), whilst supporting the three-phase motor ( Item 8 ), to
allow the wide V-belt ( Item 6 ) to be detached from the variable-speed pulley R
( Item 1 ).
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Servicing