Koso REXA Electraulic Xpac, Installation And Operation Manual

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Xpac
Installation Manual -- Version 5.1 (5/08)
48
REXA
Electraulic Actuators & Drives
5.5.1 End Stop Adjustment
Counter Clockwise
Adjuster Clockwise Adjuster
Figure 5.5.1-1 Cylinder End Stops
WARNING:
The Calibrated end points PL and PH must not be set with the actua-
tor against the cylinder end stop.
1. Position the actuator in the desired final fail position slightly beyond the
calibrated end stop. This can be done when calibrating PL and PH.
Note: Failure to follow this step will lead to a potential situation where the electronics may
try to drive the actuator beyond its physical limit, and a stall condition will result.
2. Turn off the power breaker in the electronics.
3. Locate the correct stroke adjuster (refer to Figure 5.5.1-1).
4. Locate the hydraulic fitting (1) connected directly to the stroke adjuster
cylinder cap as shown in Figure 5.5. Loosen this fitting to allow oil to
escape during this adjustment process.
5. Loosen the jam nut (Figure 5.5.1-2) by turning counterclockwise. Back off
this jam nut 4 to 5 turns and move the countersunk washer away from the
thread seal and against the repositioned jam nut.
6. Using light oil and a small brush or squirt can, generously lubricate the
thread seal rubber and the threads of the adjustment screw.
7. Carefully pry the thread seal washer away from the end cap and then pull
and twist it back and forth to carefully slide it along the adjustment screw
threads to gain adjustment clearance.