Emerson Bettis G Series - 3.6 G7 through G10 M18 Hydraulic Override Cylinder Reassembly

December 2020
Installation, Operation and Maintenance Manual
VA-DC-000-1878 Rev. 0
28
Section 3: Actuator Reassembly
Actuator Reassembly
3.6 G7 through G10 M18 Hydraulic Override
Cylinder Reassembly
NOTE:
Review Section 3 step 3.1, General Reassembly before proceeding with G7 through G10
M18 Hydraulic Override Cylinder Reassembly.
3.6.1 Install Polypak seal (8 - 30) into hydraulic cylinder assembly (7 - 10).
NOTE:
The lip of Polypak seal (8 - 30) will face toward the hydraulic override end cap when
installed in the hydraulic cylinder assembly.
3.6.2 Install rod bushing (8 - 20) into hydraulic cylinder assembly (7 - 10).
3.6.3 Install rod wiper (8 - 10) into hydraulic cylinder assembly (7 - 10).
3.6.4 Install two split ring halves (7 - 30) into the inner most groove in piston rod (7 - 20)
and retain by installing retainer ring (7 - 40) onto the split ring halves.
3.6.5 Apply hydraulic uid to O-ring seal (8 - 50) and install it into the seal groove
located between the two split ring grooves on the piston rod (7 - 20).
3.6.6 Install the piston (7 - 50) onto the piston rod (7 - 20) and up against the split rings
install in step 3.5.4.
3.6.7 Install two split ring halves (7 - 30) into the outboard groove in piston rod (7 - 20)
and retain by installing retainer ring (7 - 40) onto the split ring halves.
3.6.8 Install Polypak seal (8 - 60) into outer diameter seal groove of piston (7 - 50).
NOTE:
The lip of Polypak seal (8 - 60) will face toward the hydraulic override outer end cap (7 - 70)
when installed in the hydraulic cylinder assembly.
3.6.9 Install piston bearing (8 - 40) into outer diameter bearing groove of piston (7 - 50).
3.6.10 Install O-ring seal (8 - 80) into inner diameter seal groove located in the
piston (7 - 50).
3.6.11 Use pipe dope on the threads install pipe plug (7 - 110) into the vent tube hole in
the inboard end of the hydraulic cylinder assembly (7 - 10).
3.6.12 Install vent tube (7 - 60) into the hydraulic cylinder assembly inboard end.
3.6.13 Install the assembled piston rod (7 - 20) with piston (7 - 50) into the open end of
the hydraulic cylinder assembly and install the piston over the vent tube (7 - 60).
3.6.14 Install O-ring seal (8 - 90) into the vent tube port located in the outer end cap (7 - 70).