November 2015
Installation, Operation and Maintenance Manual
RGS011110-3 Rev. 0
11
Section 4: Maintenance
Maintenance
Figure 7
Piston O-ring
Wiper O-ring
Springs
Piston
Safety Collar
Piston Bolt
Spring Retainer
WARNING: DO NOT REMOVE/LOOSEN TIE ROD NUTS
Do not remove/loosen tie rod nuts unless cylinder is fully depressurized. Components may
exit the actuator dangerously if disassembly is attempted under pressure.
Ensure that all process lines are safe.
Read all maintenance instructions before starting work.
WARNING: ENSURE UNIT IS SAFE TO DISASSEMBLE
When unthreading tie rod nuts, first unthread all nuts until they are flush with the
ends of the tie rods. If there is still force pushing outward on the end cap at this point, a
dangerous condition may exist. A travel stop or override device may be putting pressure
on the springs, or there may be component damage. Fully removing the tie rod nuts in this
condition may allow the springs to dangerously decompress. Do not continue further until
it is assured that the unit is safe to disassemble.
NOTE:
Performing piston seal replacement on one cylinder at a time will allow maintenance
while retaining travel stop adjustment. If both cylinders will be removed at the same
time, the travel stops must be fully unthreaded prior to removing the end caps. Leaving
the travel stops in place will put spring pressure on the end cap when it is removed,
which could cause serious injury or death.
