2020
-20-
An inspection of the backstop is also required in the following circumstances:
- In case of disassembly of the gear unit or one of its components
- In the event that abnormal wear or material break-out of gears, bearings or any other
component or pollution of the oil has been detected in the gear unit, since this may have
affected the condition of the sprags and raceways of the backstop.
The outcome of the periodical inspection is to be reported in a logbook.
Never loosen any part of the backstop while the gear unit is loaded:
loosening the backstop may cause reversal of the drive and running back of
the load. Prior to loosening the backstop remove the load and secure the
drive against unwanted movement.
8.1.STANDARD BACKSTOP INTEGRATED IN THE GEAR UNIT
These backstops are lubricated by the oil bath of the gear unit and require, apart from the
regular inspections indicated above, no further maintenance.
8.2. EXTERNALLY FITTED BACKSTOP
In case the gear unit is equipped with an externally fitted backstop, please refer to the
corresponding additional Service Manual for maintenance and inspection. The above
instructions for inspection remain valid.
Alteration of the direction of rotation of a backstop may only be carried out
by authorised personnel and according to the instructions shown in the
relevant instruction leaflet.
9. STARTING-UP
9.1. ALL GEAR UNITS
Before starting-up, check oil level with dipstick and make sure that all points
are lubricated.
Although all greasing points have been greased before delivery, it is advisable to give a few
shots with a grease gun before starting-up.
Check all fixation points between gear unit and foundation.
They may require retightening after some running time.
The alignment of the complete drive packages mounted on a bedplate has been carefully
checked before shipment. It is nevertheless required to check that the bedplate has not been
deformed during transport or erection. Therefore check again alignment of couplings or other
elements after final installation.
Make sure that protection hoods and air guiding plates, if any, in case of fan cooling are
properly fitted.
Gear units may rotate in both directions except when direction of rotation is indicated.
On gear units equipped with backstops, check whether direction of motor
rotation corresponds to backstop freewheeling direction, before coupling
motor to unit.
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