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667 Actuator (Size 30/30i - 76/76i and 87)
June 2017
6. Remove the following connected parts: the diaphragm (key 3), upper diaphragm plate (key 4), spacer (key 2), cap
screw (key 12), lower diaphragm plate (key 71), and actuator stem (key 144). Be careful when pulling the threads of
the actuator stem through the seal bushing (key 7) to avoid damaging the O‐rings (key 8).
7. Remove the cap screw (key 12) to separate the parts of this assembly.
8. To remove the seal bushing, remove the snap ring (key 72), and lift out the bushing. Inspect, and if necessary,
replace O‐rings (keys 8 and 9).
9. Remove cap screws (key 30), and take off the lower diaphragm casing (key 64) and the gasket (key 70, size 30/30i
through 60/60i and 76/76i) or O‐ring (key 70, size 70/70i or 87). If necessary, the down travel stops (key 77) can be
removed.
Table 2. Actuator Assembly Recommended Torque Values
DESCRIPTION, KEY
NUMBER
(1)
Casing to yoke, key 30
Travel stop, key 12
MO U-bolt nut, key 170
MO U-bolt nut, key 147
MO U-bolt nut, key 144
(1)
Diaphragm casing, key 14
Hex cap screw,key 256
Hex cap screw,key 257
(2)
Stem connector, key 26
1. Observe tightening pattern and procedure described in the appropriate Actuator Assembly section.
2. Torque values when lithium grease is used on the threads.
Actuator Assembly
Refer to table 2 as appropriate.
1. Coat the O‐rings (key 70/70i, sizes 70 and 87) with lithium grease (key 237), or, coat the gasket with lithium grease
(key 237). Place a new gasket or O‐ring (key 70) on the yoke (key 73). Position the lower diaphragm casing (key 64)
on the yoke and align the holes. Insert the cap screws (key 30) and tighten evenly in a crisscross pattern to 41 NSm
(30 lbfSft) for size 30/30i‐60/60i and 76/76i actuators or 95 NSm (70 lbfSft) for size 70/70i and 87 actuators. If down
travel stops (key 77) were removed, insert and tighten them.
2. Coat the O‐rings (keys 8 and 9) with lithium grease (key 237) and place the O‐rings in the seal bushing (key 7).
3. Fill the seal bushing with lithium grease (key 237), slide the bushing into the yoke (key 73), and install the snap ring
(key 72).
CAUTION
Be careful during assembly to avoid damaging the O‐rings (key 8).
4. Assemble the actuator stem (key 144), lower diaphragm plate (key 71), diaphragm (key 3), upper diaphragm plate
(key 4), and the travel stop cap screw and spacer (keys 12 and 2). Coat the cap screw threads with lithium grease
14
ACTUATOR SIZE
30/30i to 60/60i and 76/76i
70/70i and 87
30/30i
34/34i and 40/40i
45/45i to 76/76i and 87
34 and 40
45 to 60
34 and 40
45 to 60
30/30i to 76/76i and 87
34i to 40i
45i to 60i
34i to 60i
30/30i through 40/40i
45/45i through 70/70i
87
THREAD SIZE, INCH
3/8-16
1/2-13
3/8-24
1/2-20
3/4-16
1/2-13
5/8-11
3/8-16
3/8-16
3/8-24
1/2-13
5/8-11
3/8-16
5/16-18
3/8-16
1/2-13
Instruction Manual
TORQUE
N•m
Lbf•ft
41
95
41
68
183
81
163
41
41
27
92
163
39
23
39
91
D100310X012
30
70
30
50
135
60
120
30
30
20
68
120
29
17
29
67
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