IMO 11/19
6
IMO-553 EN
50
60
40
40
Figure 6
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: Do not use air pressure to
remove pistons from actuator housing. 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.
18
1
8
50
8
10
60
Figure 7
5. Drive Shaft (60) and Bearing (6, 7) Disassembly,
(Figure 7):
A. Remove spring clip (18) carefully. 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.
TABLE 2
Recommended VPVL Lubricants
General Use
Dow Corning type Molykote® G-2003
O-Ring Areas
Dow-Corning Silicone 111
(For Standard and High Temperature)
Parker Super-O-Lube
(For LX Option)
60
6
21
20
7
Figure 8
18
8
1
1
8
10
60
60
1
50
Figure 9
Molykote is the registered trademark of Dow Corning
Corporations.
