Specifications

16. Install limit switch cam shoes (17) and cam
caps (18) on shaft (2) with screws (19).
17. Position can mounting bracket (12) on shaft
so mark at tip of cam aligns with center of
follower arm roller bearing. Tighten cam
mounting bracket SCIWS (13).
18.
Install linkage lever (23) with screw (24).
19. Install cylinder lever (9) with key (10) and
screws (11).
20.
Install sector gear (6) with key (8) and
sixews (7). Remove prop from clapper lever.
21.
Refer to Section VI and lubricate power
positioner shaft bushings.
22. Refer to Section N and calibrate power
positioner.
23. Return power positioner to service
6.
7.
8.
9.
10.
i. Transfer Valve. Use the following procedure to
replace the transfer valve.
11.
1. Remove power positioner from service.
2. Close supply air shutoff valve.
12.
Remove transfer valve knob from transfer
valve.
Remove screws (9, Figure 74) and dust cover.
Remove supply air connector (19) from
elbow (17). Remove elbow from transfer
valve (13).
Remove connector (18) from adapter (16).
Remove adapter from transfer valve (13).
Remove screws (10) securing transfer valve
(13) from valve bracket (12) and remove
V&X.
Install adapter (16) and elbow (17) in new
transfer valve. Install new valve on valve
bracket with screws (10).
Connect air supply connector (19) to elbow
(17). Connect connector (18) to adapter (16).
Open air supply shutoff valve and test for
leakage around transfer valve with a leak
detector such as “Snoop”.
Reinstall top cover and screws (9). Install
transfer valve knob.
Return power positioner to service.