NORD Drivesystems Berges-VG - Manual (Page 21)

Fitting U and Z version ( see also Figures 3 and 4, Page 12 )
ƒ 1. First fit the new wide V-belt into the spring-loaded spring pulley F ( Item 2 ) and
thread it up by hand and then fit it into the fully-open mechanically adjustable
variable-Speed pulley R ( Item 1 ). Turn the drive by hand until the belt is taut.
ƒ 2. Bolt the halves of the housing ( Items 3 und 4 ) back together ( 4, 6 or 8
bolted connections )
ƒ 3. Conduct a trial run. When doing this, check the speed limits and the setting
of the speed indicators using a hand-held rev-counter. It may be necessary to
readjust the setting owing to allowable wide V- belt length tolerances ( see
see Chapter 6.2.2, Page 21 - 23 ).
Tip! U version, Figure 9
On sizes RGAE 4 to 9, the spring pulley F ( Item 2 ) can be opened by screwing a
bolt into the main hub flange against spring pressure. The wide V-belt can then be
fitted first into the open spring pulley F ( Item 2 ) and then into the open variable -
speed pulley R ( Item 1 ). Follow the reverse procedure when removing.
Caution!
Always remove the bolt again after fitting and prior to placing into operation.
Figure 9 Spring pulley F
Item 1 Only on sizes 4 - 9
Required bolt dimensions :
DIN 933
Size 4/210 M5 x 45
Size 5/250 M5 x 55
Size 5/280 M6 x 70
Size 6/300 M8 x 70
Size 6/350 M8 x 70
Size 7/375 M8 x 80
Size 7/400 M8 x 80
Size 8/450 M12 x 90
Size 8/500 M16 x 90
Size 9/600 M20 x 100
6.2.2 Setting the output speed
ƒ The output speed limits n
2max
and n
2min
are preset at the works ( only on com-
plete gears and RGAE with base / flange and mounted motor ). If there is heavy
wear orafter changing the wide V-belt, it may be necessary to readjust the speed
limits in line with the information on the rating plate ( Item 8.1, Figures 3 and 4 ).
21
Servicing