PM-ERV-B/USA
Maintenance Instructions & Generic Parts List
ERV Series Actuator
4
Parker Hannifin Corporation
Actuator Division
Wadsworth, OH 44281
Exploded View
Carriage Assembly & Preload Adjustment
When the actuators come from the factory the carriage wheels will be preloaded. If over the course of time
the actuator becomes damaged or the preload is lost the wheels can be easily adjusted or if necessary
replaced in the following manner.
1. Use good general safety guide lines when working on any type of machinery
2. Review the specific application for any potential personal injury and property damage while
servicing the actuator.
3. Disconnect all power to the actuator.
4. If the actuator is equipped with end of travel bumpers, remove the bumper assemblies on the idler
(not the motor) end of the actuator.
5. Disconnect the carriage from the shuttle by removing the three carriage bolts (8).
6. Roll the carriage off the end of the body extrusion. Note, the actuator is designed so that the
carriage assembly can be removed for carriage maintenance purposes without disturbing the drive
belt tension.
*** DO NOT REMOVE THE CARRIAGE ROLLER WHEELS FROM THE CARRIAGE AT THIS TIME ***
7. Review the hex nuts/roller cams (5) on the carriage. Take special note that on half of the hexes the
bolt is off center inside the hex. These are the cams that produce the preload in the carriage. The
other half of the hexes have the bolts in the center. These are the main load bearing roller wheels.
8. Use a removable marker of some type to identify what locations on the carriage use the off center
cams. This will help you to put the carriage back together the same way (i.e. positively or
negatively loaded carriage – see the product catalog for a description).
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