Installation, Operation and Maintenance Manual
MAN-02-01-39-0704-EN Rev. 0
July 2019
Assembly
10.3
Assembly of Canted Yoke Actuators
Canted yoke actuators are assembled the same way as the symmetric yoke actuators
except for the following additional instructions for specific models.
Canted yoke actuators have a non-symmetrical piston rod as well as a non-
symmetrical yoke. It is important to orient the piston rod with the longer dimension
in relation to the yoke as shown in Figure 7.
Note that the finished housing assembly
is used for both fail open and fail closed actuators.
(Models 135-1150)
A.
Insert the yoke (2) into the housing (1) and position the yoke in the fully clockwise
position (viewed from the thrust plate (13b) side).
B.
Insert the piston rod (4) correctly oriented with the longer dimension as shown in
Figure 7.
C.
Install the thrust pin (9) and roller bearings (10) using generous amounts of
Whitmore Omnitemp grease and install both pin retaining rings (11).
D.
Shift the yoke (2) and piston rod (4) so that the thrust pin (11) and roller bearing
(10) assembly can be inserted into the yoke slot. The absence of the piston rod
bushings (7) and output shaft bushings (5) allows just enough room for
this process.
E.
Insert the lower output shaft bushing (5) and retaining ring (12b). This bushing
must have a press fit. The integral seal o-ring must be oriented toward the yoke.
F.
Insert the yoke key (6b) into the output shaft (3), then insert the output shaft into
the housing (1) and yoke(2) and lower output shaft bushing (5).
G.
Install the upper output shaft bushing (5) over the output shaft and into the
housing (5). The bearing must have a press fit. The integral seal o-ring must be
oriented toward the yoke.
H.
Install output shaft thrust washer (22), thrust plate gasket(13b) thrust plate (13b),
thrust washer (22) and retaining ring (8).
I.
Install Pointer adaptor (13) using two socket head cap screws.
J.
Install the thrust plate seal (12), pointer (16) and pointer washer (21).
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Section 10: Assembly
Summary of Contents for Bettis M Series
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