Emerson Bettis GTD Series, Service Instructions Manual

Page: 17 / 37

Service Instructions
133893 Rev. C
January 2013
14
Section 3: Actuator Reassembly
Actuator Reassembly
CAUTION: INSTALL POLYPAK SEAL CORRECTLY
Install Polypak seal with energizer ring facing piston side of inner end cap.
3.3.14 Install rod bushing (4-20) into inner end cap (3-10).
3.3.15 Install rod wiper (4-10) into inner end cap (3-10).
3.3.16 Install one o-ring seal (4-90) into inboard face of inner end cap (3-10).
3.3.17 Install one o-ring seal (4-40) into outboard face of inner end cap (3-10).
3.3.18 Install inner end cap (3-10) onto piston rod assembly (3-40) and into inboard end
of cylinder (3-70).
3.3.19 Install tie bars (3-20) through outer end cap (3-80) and into inner end cap (3-10).
Screw all tie bars (3-20) into inner end cap (3-10) per instructions given in note
number eight located on the assembly drawing page 1 0f 2.
3.3.20 Temporarily install outer end cap (3-80) into open end of cylinder (3-70).
3.3.21 Install the hex nuts (3-90) onto tie bars (3-20) and temporarily tighten against
outer end cap (3-80).
3.3.22 Check to verify that o-ring seal (4-90) is properly seated in its seal groove located
on the housing side of inner end cap (3-10).
3.3.23 Using lifting equipment move the power module up to housing (1-10) and align
piston rod assembly (3-40) with guide block assembly (1-30).
3.3.24 Using a male square drive extension, go through outer end cap (3-80) and screw
piston rod assembly (3-40) into guide block assembly (1-30).
WARNING: DO NOT CROSS-THREAD PISTON ROD ASSY
When screwing piston rod assembly into guide block assembly (1-30) make certain that
the piston rod assembly threads do not cross-thread.
3.3.25 Torque tighten piston rod assembly (3-40) until a final lubricated torque, as listed
in the following table, has been achieved.
Table 2� Piston Rod Assembly Torque Information
Housing
Model
TORQUE (±5%)
Housing
Model
TORQUE (±5%)
FT-lb N-m FT-lb N-m
GTD01 131 178 GTD7 240 325
GTD2 196 266 GTD8 240 325
GTD3 240 325 GTD10 240 325
GTD4 240 325 GTD13 240 325
GTD5 240 325
3.3.26 Install lock washers (3-110) onto socket cap screws (3-115).
3.3.27 Install socket cap screws (3-115), with lockwashers (3-110), through inner end cap
(3-10) and screw into housing (1-10).
3.3.28 Refer to assembly drawing page 2 of 2 Detail "B". Install lock washers (3-110) onto
socket cap screws (3-100).
3.3.29 Install socket cap screws (3-100), with lockwashers (3-110), through inner end cap
(3-10) and housing (1-10).