Mounting Cam Coupling; Mounting Cam; Lever S/A Orientation; Lobe Identification - GE Masoneilan 4700P Maintenance Manual

Mounting Cam Coupling

See Figure 19 on page 68 and Figure 20 on page 71.
The cam coupling (34), used on rotary actuators, is positioned on the shaft with the key engaged
in the shaft slot and the set screws (35) to the top and side. The coupling hold-down screw (32)
with the lockwasher (33) is torqued to 125 inch-lbs.

Mounting Cam

The cam holder (36) and cam (26) are positioned on the cam coupling (34) so that the desired cam
lobe's low signal line is properly adjusted on the cam follower (4A). Proper adjustment is achieved
when:
The desired cam lobe's low signal line is in alignment with the raised
reference line on the positioner (Figure 19 on page 68).
The cam is centered between the two arms of the cam lever S/A (3)
(Figure 19 on page 68).

Lever S/A Orientation

See "Field Mounting and Complete Calibration, Rotary Actuators" on page 51 and "Field Mount-
ing and Complete Calibration Reciprocating Valves using 87/88 Actuators " on page 54).
The relative position of the lever S/A (3) for a selected cam lobe must be correct. The lever S/A
can be mounted with its pivot post to the left or right of the cam center.
44 | =GE Oil & Gas
Figure 17 Lobe Identification
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