AUMA Part-turn gearboxes GS 50.3 - 250.3, primary reduction gearings VZ 2.3 - 4.3_GZ 160.3 - 250.3 - Manual (Page 20)

12.2 Grease change for worm gearboxes GS 50.3 – GS 125.3 and primary reduction gearing VZ 2.3 – VZ 4.3 .
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 pressure!
12.2.1 Worm gearboxes Refer to spare parts list GS 50.3 – GS 125.3, page 24.
Grease type, see name plate; grease quantities, see page 19, table 4.
.
Mark position of the gearbox on the valve, loosen connecting bolts to the valve
and remove the worm gearbox. .
Remove fastening bolts with lock washers from the housing cover (518.0) and
take off housing cover. .
Remove bolts with lock washers from the bearing cover (522.0). Lift worm wheel
carefully from the housing. For this, the worm shaft must be pulled from the
bearings and tilted slightly in the worm channel.
.
Remove old grease completely from the housing and the individual parts and
clean gear housing. For this purpose, a suitable cleaning agent should be used. .
Clean mounting faces at housing and housing cover (518.0). Replace O-rings at
the worm wheel (010, 011) by new ones. .
Re-insert worm wheel carefully and bring worm shaft into correct position, fasten
bearing cover (522.0) at housing with bolts and lock washers. .
Fill with new grease.
.
Place housing cover (518.0) on housing, while ensuring the proper position of
the O-rings (010, 011) at the worm wheel. Place bolts with lock washers and
fasten them evenly crosswise.
– Thoroughly degrease mounting faces at mounting flange.
– Apply non-acidic grease at splines of coupling
– Mount worm gearbox to valve, ensure correct position,
observe mark made in previous step
– Fasten with bolts of minimum quality 8.8 using lock washers, fasten bolts
crosswise to the appropriate torque according to table 2, page 11. .
Gearbox without primary reduction gearing: Continue with section “After
maintenance”. .
Gearbox with reduction gearings VZ 2.3 – VZ 4.3: Perform grease change at the
reduction gearing according to the following subsection.
12.2.2 Primary reduction gearing Refer to spare parts list VZ 2.3 – VZ 4.3., page 24.
Grease type, see name plate; grease quantities, see page 19, table 4. .
Remove bolts with lock washers from housing cover (020.0) and pull off housing
cover (020.0) with the complete input drive shaft (021.0). .
Take off plate with internal teeth (045.0) and planet carrier (022.0) with the
planet wheels. .
Remove old grease completely from the housing and the individual parts and
clean them. For this purpose, a suitable cleaning agent should be used. .
Clean mounting faces at housing (019.0), housing cover (020.0) and plate with
internal teeth (045.0). Replace O-rings by new ones. .
Insert planet carrier (022.0) with planet wheels.
.
Fill with new grease.
.
Place plate with internal teeth (045.0) and insert the input drive shaft (021.0)
completely. Screw in bolts with lock washers and fasten them evenly crosswise to
the appropriate torque according to table 2, page 11.
.
Continue with section “After maintenance”, page 22.
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Worm gearboxes GS 50.3 – GS 250.3 Operation instructions