AirSep AS-Q, Instruction Manual

Page: 159 / 198

AS-Q—AS-Z Series Instruction Manual 159
AirSep Corporation
A. Remove both stop cap screws (02) together with
nut (04) and washer (03).
B. Remove stop screw o-rings (11) and discard if
replacing all soft parts.
3. End Cap (30, 31) Disassembly, (Figure 5):
A. Remove the end cap bolts (13) in the sequence
shown in (Figure 5). CAUTION: When
disassembling a spring return actuator, the end
cap (30, 31) should be loose after unscrewing
end cap bolts (13) 4-5 turns. If there is still force
on the end cap (30, 31) after 4-5 turns of the
end cap bolt (13), this may indicate a damaged
spring cartridge and any further disassembly
should be discontinued. Further disassembly
of the end-caps may result in serious personal
injury. Return actuator to Metso for further
maintenance.
B. For spring return actuators, remove spring
cartridges (17).
C. Remove end-cap o-rings (14) and discard if
replacing all soft parts.
4. Piston (40) Disassembly, (Figure 6):
A. Holding the body (50) in a vice (or similar device),
rotate the drive shaft (60) until the pistons (40)
are released. CAUTION: Air Pressure should not
be used to remove the pistons from the body.
Clean and inspect the piston teeth for signs of
wear. Replace piston if wear seems excessive.
B. Remove piston o-ring seal (16) using a screwdriver.
Remove the piston head (15) and piston back (5)
bearings. Discard bearings if replacing all soft
parts.
5. Drive Shaft (60) and Bearing (6, 7) Disassembly,
(Figure 7):
A. Remove spring clip (18) carefully, using snap-ring
pliers. Remove external thrust bearing (8) and
thrust washer (10).
B. Apply downward force to top of drive shaft (60)
until it is partially out of the bottom of the body
(50) and the octi-cam (1) and internal thrust
bearing (8) can be removed. Remove the octi-cam
(1) and internal thrust bearing (8). Push the drive
shaft (60) completely out of the bottom of the
body (50). If the shaft (60) does not move freely,
gently tap with a plastic mallet.
C. Remove the top and bottom shaft bearings (6, 7)
and top and bottom shaft o-rings (21, 22). Discard
if replacing all soft parts.
6. Cleaning and Inspection.
A. When all components are disassembled, those not
being replaced should be properly cleaned and
inspected for wear prior to re-assembly.
Figure 5
3
30, 31
2
4
1
13
Figure 7
18
1
8
50
8
10
60
Figure 6
50
60
40
40
IMO 11/17
IMO-528 EN 5