August 2015
Service Instructions
137463E Rev. D
10
Section 3: Actuator Reassembly
Actuator Reassembly
Section 3: Actuator Reassembly
3�1
General Reassembly
CAUTION: CHECK SHELF LIFE OF SEALS
Only new seals that are still within the seals expectant shelf life should be installed into the
actuator being refurbished.
3.1.1
Remove and discard all old seals and gaskets.
3.1.2
All parts should be cleaned to remove all dirt and other foreign material prior
to inspection.
3.1.3
All parts should be thoroughly inspected for excessive wear, stress cracking,
galling and pitting. Attention should be directed to threads, sealing surfaces and
areas that will be subjected to sliding or rotating motion. Sealing surfaces of the
cylinder, torque shaft and center bar assembly must be free of deep scratches,
pitting, corrosion and blistering or flaking coating.
CAUTION: REPLACE WITH NEW PARTS
Actuator parts that reflect any of the above listed characteristics may need replacement
with new parts.
3.1.4
INSTALLATION LUBRICATION INSTRUCTIONS:
Use the correct lubrication as
defined in Section 1 step 1.6.
3.1.4.1 Before installation coat all moving parts and the thrust washer (8-30) with
lubricant.
3.1.4.2 Coat all seals with lubricant, before installing into seal grooves.
3.1.5
Torque shaft upper bearing (2-20) and lower bearing (2-50) are not recommended
as parts that require field replacement. Consult Houston, Texas Bettis Service
Coordinator for “torque shaft upper or lower bearing” replacement information.
3�2
Housing Reassembly
NOTE:
Review Section 3 steps 3.1.1 through 3.1.5 before proceeding with housing reassembly.
In section 3.2 where the step indicates to "lubricate, coat or apply lubricant", use lubricant
as identified in Section 1 step 1.6 for lubricating the part being installed.
Actuators equipped with M3 jackscrew install M3 per 3.2.1. Actuators equipped with housing
adapter ES or stop screw (6-30) skip step 3.2.1 and continue assembly at step 3.2.2.
