Replacing The Actuator Stem Seals - Samson 3271 Mounting And Operating Instructions

b) Actuator stem retracts
See Fig. 9-2
1. Lift off the top diaphragm case (A1).
2. Pull the actuator stem (A7) together with
the diaphragm plate (A5) and dia-
phragm (A4) out of the bottom dia-
phragm case (A2).
3. Clamp the actuator stem (A7) into a vise
using protective jaws. Make sure that the
actuator stem is not damaged.
4. Unscrew the collar nut (A15).
5. Take the compressor (A35) together with
the diaphragm plate (A5) and dia-
phragm (A4) off the actuator stem (A7).
6. Place the new diaphragm in the dia-
phragm plate (A5). Make sure that the
seal lip of the diaphragm (A4) is inserted
correctly between compressor (A35) and
diaphragm plate (A5).
7. Check the sealing element of the collar
nut (A15). If necessary, renew it (order
no. 8353-0539).
8. Screw the collar nut (A15) on the actua-
tor stem (A7). Observe tightening
torques.
9. Check whether the springs (A10) rest
correctly in the bottom diaphragm case
(A2).
10. Apply a suitable sealant and lubricant to
the actuator stem (A7).
11. Insert the actuator stem (A7) together
with the diaphragm plate (A5) and dia-
phragm (A4) into the bottom diaphragm
case (A2).
EB 8310-4 EN
12. Place on the top diaphragm case (A1).
13. Fasten the top and bottom diaphragm
cases (A1, A2) together using the nuts
(A21) and bolts (A20). Observe tighten-
ing torques.
A4 Diaphragm
A5 Diaphragm
plate
A7 Actuator stem
Fig. 9-2: Arrangement of parts for "stem
retracts" direction of action
9.4.2 Replacing the actuator
stem seals
1. Lift off the top diaphragm case (A1) and
remove springs (A10).
2. Pull the actuator stem (A7) together with
the diaphragm plate (A5) and dia-
phragm (A4) out of the bottom dia-
phragm case (A2).
3. Remove the radial shaft seal (A40).
4. Check the dry bearing (A42) and wiper
(A41) and renew them, if necessary.
Servicing and conversion
A35 A15
A4
A5
A37
A7
A15 Collar nut
A35 Compressor
A37 Shim
9-5