July 2019
Installation, Operation and Maintenance Manual
MAN-02-01-39-0704-EN Rev. 0
Disassembly
Section 9: Disassembly
9.1
Disassembly of Symmetric Yoke Actuators
A.
Remove endcap(s) (27); tie rods (41) and cylinder (24). Remove rod cover (28)
if applicable.
B.
Remove piston bolts (33) and pistons (25) and springs if applicable (55 and 56).
C.
Remove adaptor (26) and piston rod seals (29).
Note:
003 one piece cast housing / adaptor.
D.
Remove housing cover (18), pointer (16) and position indicator (where applicable)
(13).
(Models 003-100)
E.
Disengage yoke (2) from roller bearing assembly by pulling piston rod to extreme
right, as in Figure 5, and swing yoke mechanism clear of roller bearing as in Figure 6.
F.
Rotate piston rod 90° to allow access to retaining ring (11) as shown in Figure 7.
G.
Remove retaining ring and bearing (10). Then rotate piston rod (4) 180° and
remove the bearing and thrust pin assembly.
H.
Remove piston rod (4) and piston rod bushings (7).
I.
Remove plug (12) from back of housing.
J.
Using a punch or suitable dowel pin, insert through clearance hole and press yoke
pin (6) out.
K.
Remove retaining ring (8) from output shaft. Remove output shaft and yoke.
L.
Remove bushings (5) from housing.
(Models 135, 270-1150)
E.
Disengage yoke (2) from roller bearing assembly by pulling piston rod (4) to
extreme right, as in Figure 5, and swing yoke (2) clear of roller bearing (10)
assembly. See Figure 6.
F.
Rotate piston rod (4) 90° to allow access to retaining ring (11) as shown in Figure 7.
G.
Remove the thrust pin retaining rings (11) and withdraw the roller bearings (10),
and thrust pin (9).
H.
Remove piston rod (4) and piston rod bushings (7).
I.
Remove retaining rings (8) and (12b) on both ends of output shaft.
J.
Remove thrust plate (13b) and thrust washers (22) from the output shaft (3).
K.
Position the yoke (2) in the fully clockwise position (viewed from the thrust plate
(13b) side).
L.
Using a soft hammer, drive output shaft (3) out through top of housing (1).
M.
Withdraw yoke (2) from housing (1).
N.
Remove the output shaft bushings (5) from the housing (1).
(Models 1480, 1929, 1930, 2380)
E.
Remove the pointer (16) and accessory drive (13) from the actuator by removing
the screw (14) from inside the yoke (2) bore.
F.
Remove all cover bolts (19). Three of these bolts occupy "jack bolts" holes and are
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Section 9: Disassembly
Summary of Contents for Bettis M Series
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