Assembly - Emerson Fisher 1052 Instruction Manual

1052 Size 20 Actuator (H)
June 2017
assembly (key 10) from the lever (key 27). Remove the lever with the attached travel stops and hex nuts
(keys 8 and 86).
10. Pull the diaphragm plate (key 4) and attached diaphragm rod (key 10) out of the actuator. Remove the cap screw
(key 9) and washer (key 79) and separate the diaphragm plate and diaphragm rod.
11. Remove the actuator spring (key 11) from the actuator, lift out the spring adjuster (key 74), the spring seat
(key 13), and the thrust washer (key 71).
12. Check the condition of the bearing (key 31). If replacement of the bearing is necessary, the travel indicator
(key 37) must first be removed by removing the machine screws (key 38). Then, the hub (key 29) and travel
indicator scale (key 35) must be removed by removing the self‐tapping screws or cap screws (key 36). Mark the
orientation of the travel indicator scale with respect to the actuator housing before removing it.

Assembly

This procedure assumes that the actuator is completely disassembled. If the actuator is not completely disassembled,
start these instructions at the appropriate step. Key numbers referenced in the following procedure are shown in
figure 6. Before assembling the actuator, apply lithium grease (key 76) to the threads of the spring adjuster (key 74),
to the inside of the lever (key 27), and to the equipment operating shaft.
1. Replace the bearing (key 31) if it was removed. If necessary, install the travel indicator scale (key 35) with attached
hub (key 29) and retaining ring (key 30) to the actuator housing (key 20) with the self‐tapping screws or cap screws
(key 36). When installing the travel indicator scale, make sure that the markings on the scale and housing that were
made in step 10 of the Disassembly procedure are oriented correctly.
Table 2. Recommended Bolting Torques
DESCRIPTION KEY NUMBER
Diaphragm Casing 5/6
Travel Stop 86
Diaphragm to rod 9
Rod end to lever 18
Housing to yoke 23
Clamped lever 28/145
2. If necessary, install the travel indicator (key 37) to the hub so that the markings on the travel indicator and travel
indicator scale that were made in step 5 of the Disassembly procedure are oriented correctly. Attach the travel
indicator to the hub with the machine screws (key 38).
3. If the diaphragm rod/bearing assembly (key 10) was removed from the actuator and separated, thread the rod into
the rod end bearing.
4. Attach the diaphragm plate (key 4) to the diaphragm rod with the cap screw and washer (keys 9 and 79). Apply
lithium grease (key 76) to the threads of the cap screw and to the portion of the rod that fits into the diaphragm
plate.
5. Install the thrust washer (key 71), followed by the spring adjuster (key 74), the spring seat (key 13) and the spring
(key 11) into the diaphragm housing.
6. Coat the threads of the cap screw (key 18) with thread locking adhesive (medium strength) (key 77).
7. Place the diaphragm plate, diaphragm rod and rod end bearing assembly into the actuator. Bolt the rod end bearing
to the lever (key 27) with the cap screw (key 18).
8. Replace the diaphragm (key 3). Position the diaphragm casing (key 1) in place on the housing (key 20). Secure the
diaphragm casing with cap screws and hex nuts (keys 5 and 6). Ensure that the warning plate (key 56) is replaced on
the casing.
9. If necessary, assemble the lever using two travel stops studs (key 8) and locking nuts (key 86) for old and new style
levers. Newer levers that can be clamped also require that you install the cap screw (key 28) and thread the lock nut
(key 145) in place, but do not tighten it at this time.
8
Bolt Size
3/8‐24
5/16‐18
5/16‐18
5/16‐18
3/8‐16
5/16‐18
Instruction Manual
TORQUE
S
Lbf ft
20
20
16
16
25
20
D100323X012
S
N m
27
27
22
22
34
27