Samson 3372 Mounting and operating instructions - Ring and Plain Bearings
EB 8313-3 EN
31
Maintenance of Type 3372 (120 cm²)
6.5.1 Radial shaft seal, wiper
ring and plain bearings
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Use a suitable mandrel or hook to re-
move the radial shaft seal (40).
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Apply lubricant (8152-0043) to the new
radial shaft seal and carefully install it,
making sure the seal lip does not get
damaged.
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If necessary, remove the wiper ring (41)
and plain bearing (42) with a suitable
mandrel or piece of pipe. Renew these
components, if necessary.
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Apply lubricant (8152-0043) to parts
(40), (41) and (42).
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Reassemble actuator as described in sec-
tion 6.4.
6.5.2 Version with travel stop
Fig. 13
The Type 3271 Actuator (120 cm²) can op-
tionallyfittedwithatravelstop.Additionally,
a radial shaft seal and a dry bearing are lo-
cated in the top diaphragm case (1).
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Undo lock nut (101) and remove cover
(100).
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Undo both nuts (104).
After undoing the hex nuts, carefully lift the
top diaphragm case (1) off the actuator
stem.
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Use a suitable mandrel or hook to re-
move the top radial shaft seal (40) and/
or dry bearing.
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Use a suitable piece of pipe to install a
new dry bearing.
Î
Install the new radial shaft seal, making
sure the seal lip does not get damaged.
Before assembling, check each part, espe-
cially the diaphragm, for damage. Damaged
parts must be replaced with new ones.
Assemble the actuator in the reverse order.
Î
Carefully push the diaphragm case (1)
together with the radial shaft seal (40)
onto the actuator stem.
Î
Align the case (1) and fasten with wash-
ers and nuts (21).
Î
Mount nuts (104), adjust, if necessary
and lock in place.
Î
Reattach the cover (100), adjust and lock
in position with the lock nut (101).
104
100
99
101
40
1
1
Top diaphragm case
40
Radial shaft seal
99
Threaded bushing
100
Cover
101
Locknut
104
Locknut
Fig. 13: Travel limit in actuators (120 cm²)