Samson EB 31a Mounting And Operating Instructions page 40

Servicing
Check that the pistons in the end position turn the shaft 4° over
the middle line (0°), see Figure 9-8.
Figure 9-8: Piston end position
In the case of single-acting actuators, insert the spring
cartridge in the end cap.
Figure 9-9: Assembling the spring cartridges
Insert the end cap seal (14) in the groove of both end caps
(22 and 23).
Figure 9-10: Assembling the end cap screws
Note
Danger of damage to components due to incorrect assembly!
When reinstalling, the end cap can be damaged due to an
uneven application of force of the compressed springs.
Assemble the end cap and maintain a constant distance
(A = B) between the rotary actuator housing and the housing
interface, see Figure 9-10.
Observe the installation sequence, see Figure 9-11.
9-4
Figure 9-11: Assembling the end cap screws
Assemble the end cap on the housing (29).
Make sure that the o-rings lie in the grooves.
Complete tightening the screws (13), tighten each screw in
the indicated order one rotation each, see Figure 9-11.
Tightening torques, see "15.1.1 Tightening torques".
Insert both adjusting screws (2), lock nuts (4), washers (3)
and seals (11).
Screw the adjusting screws (2) into the housing, observe the
end position adjustment.
Place the position indicator (19) on the shaft and pay
attention to the correct position.
Figure 9-12: Assembling the position indicator
EB 31a_EN
December 2022 edition
Subject to technical changes