Samson 3277 Mounting And Operating Instructions page 38

Servicing
phragm plate (A5), and diaphragm (A4)
out of the bottom diaphragm case (A2).
6. Use a suitable punch to remove the radi-
al shaft seal.
7. Apply a suitable sealant and lubricant to
the new radial shaft seal (A40).
8. Use a suitable mandrel to mount the ra-
dial shaft seal.
9. Renew the dry bearing (A42) and wiper
(A41), if necessary.
10. Apply a suitable lubricant to the actuator
stem (A7).
11. Place the diaphragm plate assembly con-
sisting of the actuator stem (A7), dia-
phragm plate (A5), and diaphragm (A4)
into the bottom diaphragm case (A2).
12. Place the springs (A10) in the diaphragm
plate (A5), centering them in the intend-
ed recesses.
Fig. 13: Actuator stem seals
38
13. Place on the top diaphragm case (A1).
Ensure that the compressed air connec-
tions on the cases (A1, A2) are correctly
aligned with each other.
14. If necessary, preload the springs (see
section 5.2).
15. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20). Tighten the nuts
evenly. Observe tightening torques.
16. Mount the actuator on the valve (see sec-
tion 5.1).
Version with direction of action "actuator
stem retracts" (FE)
1. Lift the actuator off the valve. See sec-
tion 9.2.
2. Unscrew the nuts (A21) and bolts (A20)
on the diaphragm case.
A7
A40
A7 Actuator stem
A40 Radial shaft seal
A42
A41 Wiper
A42 Dry bearing
A41
EB 8310-5 EN