Samson EB 31a Mounting And Operating Instructions page 39

Figure 9-4: Disassembling the end cap screws
Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Figure 9-4 and the number of rotations specifi ed in Ta-
ble 9-1.
Table 9-1: Number of rotations
DAP/SRP rotary actuator
15
30
60
100
150
220
300
450
600
900
1200
2000
3000
4000
5000
10000
EB 31a_EN
December 2022 edition
Subject to technical changes
Number of screw rotations (13)
26 ... 28 Rotations
5 ... 7 Rotations
6 ... 8 Rotations
8 ... 10 Rotations
WARNING
Danger of injury due to defective springs!
The end caps are tensioned when the springs are compressed.
If after unscrewing the screws (13) with the number of rotations
specifi ed in Table 9-1 force is still applied on the end caps (23
and 23), the spring cartridge is possibly damaged or the pistons
are not completely closed.
Stop disassembly and contact PFEIFFER.
Remove the end cap seal (14).
Clamp the housing (29) in a vice or similar device, turn the
shaft (30) until the pistons (25) are accessible.
Figure 9-5: Disassembling the piston
Both pistons (25) are turned 180° in the axial direction and
reassembled.
Press both pistons (25) into the housing (29) at the same time
until the pistons are engaged and turn the housing until the
travel end is reached.
Figure 9-6: Assembling the pistons
Figure 9-7: Assembling the pistons
Servicing
9-3