User Guide

F-06491-28 © Copyright 2007 TAC All Rights Reserved. 11
MAINTENANCE
Caution: MA-300 series and MA-400 series actuators that are used in applications where they
are energized for extended periods of time must be electrically cycled at least once every six
months to ensure correct operation.
Regular maintenance of the total system is recommended to assure sustained, optimum
performance.
FIELD REPAIR
None. Replace an inoperative actuator with a functional unit.
DIMENSIONAL DATA
Figure-9 Dimensions of MA-3xx, MA5-318, MA-4xx, and MA5-419 (Standard) Actuators.
1/4 (6)
4-3/4 (121)
15/16 (24)
3-3/8
(86)
4-1/2
(114)
1-1/2
(38)
2-1/4
(57)
4-1/4 (108)
5-5/8 (143)
3-7/8
(98)
4 (102)
5-3/4
(146)
5-3/8 (136)
1-7/16 (37)
4-3/4
(121)
1/2 (13)
Dia. Shaft
17/64 (7)
Dia. Hole
(1 of 3)
Dimensions are in inches (mm).
1/2 (13) Conduit
Opening on Each Side