9.2.
Change of grease
.
For gearboxes with multi-turn actuator: Remove multi-turn actuator.
.
Remove gearbox from the valve:
During this time, the valve/pipeline must not be under pres-
sure!
.
Mark position of the gearbox on the valve, loosen connecting screws to
the valve and remove the gearbox.
Remove old grease:
Grease type, see name plate; grease quantities, see page 13, table 3.
The numbers used in the following text refer to the spare parts list(s) of
these operation instructions.
.
Remove screws at mounting flange (002.0).
.
Remove mounting flange assembly with hollow shaft (003.0) from the
housing.
.
Remove old grease completely from the housing and the individual parts
and clean gear housing. For this purpose, kerosene or a similar cleaning
agent may be used.
.
Replace seals S1 (005, 008, 009) by new ones.
.
Clean mounting faces at housing and bearing flange and apply a small
quantity of grease.
.
Mount bearing flange (002.0) with hollow shaft (003.0) into housing, whilst
paying attention to the O-ring S1 (008) at the bearing flange.
Screw in screws and fasten them evenly crosswise to the appropriate
torque according to table 2, page 8.
Fill with new grease:
.
Remove screws at bearing flange of the input shaft (010.0-1 or 010.0-2).
.
Remove bearing flange.
.
Fill with new grease.
.
Clean mounting faces at housing and bearing flange and apply a small
quantity of grease.
.
Fit bearing flange (010.0-1 or 010.0-2) with new O-ring S1 (006). Screw in
screws and fasten them evenly crosswise to the appropriate torque
according to table 2, page 8.
After maintenance:
.
Fasten again gearbox to valve.
.
If applicable, mount multi-turn actuator.
.
For gearboxes with multi-turn actuator, check the setting of the limit
switching according to the operation instructions for multi-turn actuators; if
required, re-set.
.
Perform test run to ensure the proper function.
.
Check the gearbox for damage to paint finish. Do a thorough touch-up to
prevent corrosion. Original paint in small quantities can be supplied by
AUMA.
14
Multi-turn gearbox GSTI 25.1 – GSTI 40.1 qualified for use in nuclear power plants
(Inside and Outside Containment)
Operation instructions
