Drehmo D 30 - Dismantling and Mounting of the Modified Stem Nut (Output Drive Type A-HP)

Valve attachment
13
Figure6: Stem nut A
[1]
[2]
[3]
[4]
[5]
[3]
[1] Retaining ring [2] Shim washer
[3] Axial bearing with two shim rings [4] Stem nut
[5] Output mounting flange
How to proceed 1. Dismantle output mounting flange [5] from actuator.
2. Remove retaining ring [1].
3. Remove stem nut [4] including shim washer [2] and axial bearing with the two
shim rings [3].
4. Drill threaded hole.
5. Reverse the process to reassemble stem nut.
6. Apply a thin film of sealing agent (e.g. Marston Durapress) at sealing faces of out-
put mounting flange [5] prior to assembly.
4.3
Dismantling and mounting of the modified stem nut (output drive type A-
HP)
For better distinction, each of the new stem nuts is marked with a turned marking
groove at the shoulder circumference.