Manual 35132
VariStroke-DX Duplex Hydraulic Servo Skid
Woodward
20
Figure 3-1. VS-DX Lifting Bracket Locations
Mounting Instructions
The VS-DX assembly is designed to be attached to a horizontal structure via the four threaded holes. The
VS-DX should be mounted as close as possible to the controlled system (hydraulic power actuator) to
minimize the hydraulic control line length and oil volume to achieve optimum system response.
Avoid mounting VS-DX near heat sources and provide adequate ventilation.
Mount VS-DX using four (4) 0.625-11 UNF size screws UNF Class 8.8 minimum. Bolts thread
engagement min 0.7 inch, maximum 1 inch (bolts not delivered with unit). Typical tightening torque 67 ± 7
Nm (50 ±5 lb-ft) assuming mounting base material Yield Strength minimum at level 662 MPa / 96 ksi. See
Figure 1-5 for bolts pattern.
Allow space for removal of the VS-GI top covers, for access to the terminal blocks and to see the status
LEDs on the printed circuit board inside VS-GI.
When installing the VS-DX pay attention to clearances required to
remove/replace component parts.
Released
