Owner's manual

ITEM DESCRIPTION
1 Stem Assembly
2 Co”“ec!i”g Link
3 Nut
4
Supply Air Tubing
5 Elbow
6 Socket Head Cap
screws
I Pilot valve
8 Manifold
9 Stand Assembly
10 F’ilot Valve Gasket
Figure 7-2. Pilot Valve
d. Diaphramn and Calibration Spring. Use the
following procedure for replacement of the
receivers diaphragm and replacement of the
calibration spring.
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic signals to power
positioner. Isolate power positioner from all
systems connected to the power positioner.
Severe injury or death may result from
large torque power positioner is capable of
producing or from electrical shock.
PART NUMBER
6639-003
7791-021
6292A08H12
771B867H05 (Brass)
771B868H05 (Stainless Steel)
70041AHo55
3531B17GOl
152168
6631D53GOl
5057-002
1. Remove power positioner from service.
2. Disconnect signal air tubing (2, Figure 7-3)
and remove 90” elbow (1).
3. Remove hex head cap screws (3) and
washers (4) securing diaphragm cover (5) to
receiver body (25).
4. Remove zero balance spring (6) from top of
diaphragm.
5. Carefully hold upper end of pilot valves
stem assembly (26). Tom connecting links
lower ball socket nut (14) counterclockwise
and free connecting link (13) from pilot
valve stem assembly.
IB-NY-204
7-3