Tolomatic User Guide:
IMA-S Integrated Motor Rod-Style Actuator - Stainless Steel
• 32 •
7:
R E P A I R A N D M A I N T E N A N C E
• 50% reduction in seal replacement interval if high sanitizing chemical concentrations are
used
• Seal exposure time is important to consider, a rinse after sanitizing is recommended to
remove residual sanitizing chemicals.
7 .2 .4 General Notes
• Periodic re-lubrication of rod seals with Mobil SHC Polyrex 462 will increase the life of the
seals.
• Periodic visual inspection of thrust rod and front seal is recommended.
7 .2 .5 Seal Cartridge Replacement Procedure
1. Secure actuator in vertical rod up orientation.
2. Loosen Hex Bolts and remove Front Head and O-Ring between Seal Cartridge
and actuator body.
3. Inspect new O-Ring and install into groove of actuator body.
A. Do Not over stretch the O-Ring, the O-Ring is designed to 'snap' into
groove.
B. O-Ring doesn't require lubrication due to the nature of the material.
4. Remove new Seal Cartridge from packaging. Verify that grease is present
between the rod seals. If no grease is present, the seals should be lubricated
with SHC Polyrex 462 before the cartridge is installed.
5. Place the new Seal Cartridge onto the Thrust Rod and push flush with the body
of the actuator.
6. Verify O-Ring is still in its groove before tightening Fasteners.
7. Install all 4 Sealing Washers and Fasteners
8. Torque Fasteners in cross pattern to the specifications listed in the table below.
A. Check Fastener torque to ensure full compression of O-Ring.
Size
Torque
(in-lbs)
(N-m)
IMA-ST22
60
6.8
IMA-ST33, IMA-SA-33
160
18.8
9. Verify O-Ring is 'flush' to the surface and that Sealing Washers are seated below each of the
Fasteners.
