End Cap Disassembly - Samson EB 31a Mounting And Operating Instructions

12.1.4 End cap disassembly

(see Figure 12-3, Figure 12-4 and Figure 12-5)
Disassemble one end cap after the other.
Disassemble the end cap screws (13) according to the order
of the disassembly sequence, see Figure 12-4.
For single-acting actuators, remove the spring cartridge (17).
.
WARNING
Danger of damage to components due to incorrect disassem-
bly!
During disassembly, the compressed springs can be damaged
due to the uneven application of force.
When disassembling the end cap screws, observe the order,
see Figure 12-4.
When disassembling the end cap, maintain a constant dis-
tance (A = B) between the actuator housing and the housing
interface, see Figure 12-5.
Figure 12-4: Disassembling the end cap screws
EB 31a_EN
December 2022 edition
Subject to technical changes
Figure 12-5: Disassembling the end cap
Release the spring compression. Unscrew each end cap
screw (13) one rotation each according to the order shown in
Figure 12-4 and the number of rotations specifi ed in Table
12-2.
Table 12-2: Number of rotations
Rotary actuator
DAP / SRP
15
30
60
100
150
220
300
450
600
900
1200
2000
3000
4000
5000
10000
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 12-2 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) and replace when replacing
spare parts.
Repairs
Number of screw rotations (13)
26 ... 28 Rotations
5 ... 7 Rotations
6 ... 8 Rotations
8 ... 10 Rotations
12-3