Installation, Operation and Maintenance Manual
VA-DC-000-1803 Rev. 2
July 2020
23
Section 3: Actuator Reassembly
Actuator Reassembly
3.3.11.1
Install two sets of rod T-seals (4 - 50) into the internal diameter seal
grooves of piston (3 - 30).
3.3.11.2
Install a back-up ring on each side of the T-seal.
3.3.11.3
When installing the back-up rings, do not align the skive-cuts.
3.3.11.4
If the back-up rings are too long and the rings overlap beyond the
skive- cuts, then the rings must be trimmed with a razor sharp instrument.
3.3.12
Install two split ring halves (3 - 50) into the inner most groove in piston rod (3 - 40)
and retain by installing the recessed area of piston (3 - 30) onto the piston rod and
over the two split ring halves (3 - 50).
3.3.13
Install two split ring halves (3 - 50) into the piston rod, in front of the piston
installed in the previous step, and retain with retainer ring (3 - 60).
3.3.14
Install one O-ring seal (4 - 40) onto the outer diameter seal groove of inner end
cap (3 - 10).
3.3.15
Coat one D-ring seal (4 - 60) with lubricant and install into the piston external
seal groove.
NOTE:
The flat side of the D-ring seal go down into the seal groove.
3.3.16
Coat two tie bars (3 - 20) with lubricant and install by carefully pushing tie bars
through piston (3 - 30) and rod T-seal (4 - 50).
3.3.17
Screw tie bars (3 - 20) into inner end cap (3 - 10) and tighten until the threads
bottom out.
3.3.18
Refer to assembly drawing page 2 of 2 Detail "E". Coat two O-ring seals (4 - 80) with
lubricant and install into outer end cap (3 - 80).
3.3.19
Apply lubricant to one O-ring seal (4 - 40) and install into the outer diameter
O-ring groove of outer end cap (3 - 80).
3.3.20
Apply lubricant to the bore of cylinder (3 - 70).
!
CAUTION
If needed, when installing the cylinder, hammer on the end of the cylinder only with a
nonmetallic object.
3.3.21
Install lubricated cylinder (3 - 70) over piston (3 - 30) and onto inner end cap
(3 - 10). When installing the cylinder over the piston seal tilt cylinder 15° to 30° to
piston rod.
3.3.22
Install outer end cap (3 - 80) over tie bars (3 -20) and into cylinder (3 - 70).
NOTE:
The pressure inlet port should be positioned in the same position as recorded in Section 2,
step 2.2.1.
