Service Instructions
124843E Rev. C
August 2015
25
Section 3: Actuator Reassembly
Actuator Reassembly
CAUTION: INSTALL TIE BARS CORRECTLY
Assemble tie bars (7-20) into inner end cap (7-10) a minimum engagement of one tie
bar thread diameter. Insure that three to four threads are equally exposed beyond the
tie bar nuts (7-90) at the outer end cap (7-80).
3.5.21 Install lockwashers (7-95) onto tie bars (7-20) and up against outer end cap (7-
80).
3.5.22 Install hex nuts (7-90) onto tie bars (7-20) and up against lockwashers (7-95).
3.5.23 Torque tighten hex nuts (7-90) until a final lubricated torque, as listed in the
following table, has been achieved.
Table 5�
Tie Bar Nuts (3-90)
Housing
Model
TORQUE (±5%)
Housing
Model
TORQUE (±5%)
Lbf-ft�
N-m
Lbf-ft�
N-m
G01
70
95
G5
385
522
G2
70
95
G7
580
786
G3
70
95
G8
580
786
G4
135
183
G10
1000
1356
3.5.24 Torque tighten piston rod (3-40) per the chart in Section 5.4 step 5.4.5.
3.5.25 Install the M11 Hydraulic Override Cylinder per Section 5 step 5.4.
3�6
Actuator Testing
3.6.1
Leakage Test - All areas where leakage to atmosphere may occur are to be
checked, using a commercial leak testing solution.
CAUTION: DO NOT EXCEED MAXIMUM PRESSURE
Pressure applied to the actuator is not to exceed the maximum operating pressure
rating listed on the actuator name tag. Test the actuator using a properly adjusted self
relieving regulator, with gauge.
3.6.2 Cycle the actuator five times at the nominal operating pressure (NOP) as listed
on the actuator name tag or the customer's normal actuator supply pressure. If
excessive leakage across the pistons is noted, generally a bubble which breaks
three seconds or less after starting to form, cycle the actuator five times as this
will allow the seals to seek their proper service condition.
NOTE:
If excessive leakage across the piston remains, the actuator must be disassembled and
the cause of leakage must be determined and corrected.
