Fisher 4060 - Cam Adjustment

Type 4060 & 4070
7
Figure 8. Front Cover and Indicator Cover
IDENTIFICATION
COVER
INDICATOR
COVER
FRONT
COVER
O-RING
NOTCH
FRONT COVER SHOWN WITH O-RING LOOPED
OVER NOTCHES TO PERMIT DRAINING
INDICATOR
COVER O-RING
B2644 / IL
FRONT
COVER
CAM LOCKING NUT
SCREW
CAM
CORRECT
INCORRECT
CAM
FOLLOWER
1/16-INC H
(1–2 mm)
Figure 9. Cam Adjustment
CAM POSITIONED FOR A FAIL-OPEN
ACTUATOR WITH 3/4-INCH (19.1 MM)
OR LESS TRAVEL
B2645 / IL
Cam Adjustment
Refer to figure 9. With the cover and indicator re-
moved, loosen the screw and turn the cam locking nut
counterclockwise until the cam loosens.
The cam has two lobes. The 30 degree lobe is used
for actuator travels of 3/4-inches (19.1 mm) or less.
The 60 degree lobe is used for actuator travels of
greater than 3/4-inch (19.1 mm). The cam also may be
turned over. Each lobe is stamped either direct (D) or
reverse (R). Refer to table 4 for cam installation infor-
mation.
Install the cam so that the follower will ride on the cor-
rect lobe listed in table 4. For fail-open actuators, the
follower will ride on the cam lobe to the right of the
follower. For fail-close actuators the follower will ride
on the cam lobe to the left of the follower.