DeZurik POWERRAC R3 Manuel d'installation et d'utilisation - Page 12
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R3 PowerRac
Lockable Model
The two lock screws (B64) must be in either the unlocked or the locked position as
described in the following sections. The gear (B8) will be damaged if either of the stop
screws is placed in an intermediate position between the unlocked and locked positions.
Unlocked Condition
Under normal unlocked running conditions, both of the lock screws are backed out of the housing to
allow the gear to rotate freely in either direction. To be fully disengaged, the distance from the housing
to the end of each lock screw must be at least 3 1/8" (80 mm). To hold the lock screws in position, the
jam nuts are tightened to 140 ± 18 foot pounds (190 ± 24 Nm).
Locked: Closed Position
Follow the steps below to change the unit from the unlocked condition to the locked closed position.
Refer to Figure 3 for component identification. Before proceeding, the open and closed position stops
must be correctly adjusted as described in the Open and Closed Stops section.
1.
Operate the actuator to the fully closed (clockwise) position.
Adjust only the left-side lock screw to lock the actuator in the closed position. Adjusting
the wrong screw does not lock the actuator, and can result in personal injury or
equipment damage.
2.
Loosen the jam nut (B65) on the left side lock screw (B64), as viewed when facing the top of
the heads of the lock screws. Hold the lock screw from turning, and turn the jam nut several
turns counterclockwise, to the head of the lock screw.
3.
Turn the left side lock screw clockwise several turns until resistance is felt from the lock screw
contacting the notch in the gear (B8). Tighten the lock screw to 5 to 10 foot pounds (7 to 14
Nm) to assure that the lock screw is contacting the gear.
4.
Turn the left side jam nut clockwise against the actuator housing. While holding the lock
screw from turning, tighten the jam nut to 140 ± 18 foot pounds (190 ± 24 Nm).
5.
Place and lock the lockout cover assembly (B60) on the head of the left side lock screw.
Locked: Open Position
Follow the steps below to change the unit from the unlocked condition to the locked open position.
Refer to Figure 4 for component identification. Before proceeding, the open and closed position stops
must be correctly adjusted as described in the Open and Closed Stops section.
1.
Operate the actuator to the fully open (counterclockwise) position.
D10359
Cylinder Actuator
TM
(Continued)
Page 12
August 2016