Manual 35132
VariStroke-DX Duplex Hydraulic Servo Skid
Woodward
48
Chapter 7.
Asset Management and
Refurbishment Scheduling Period
The following recommendations regarding the Woodward designed and manufactured VS-GI actuator are
to assist in properly managing the reliability, availability, and “safety of operation” expectations
established for turbines. While there are electronic control systems designed to monitor and diagnose the
operational performance of these components, control monitoring cannot replace normal preventative
maintenance practices. It is important to follow these recommendations in order to avoid unnecessary
and unscheduled shutdowns.
This product is designed for continuous operation under normal industrial operating conditions. Periodic
service is not required on any components. Recommend performing service during major turnarounds,
scheduled every five to eight years depending on the site and application. During major outages,
Woodward recommends the VS-GI be sent back to Woodward or a Woodward Authorized Service Facility
(AISF) for inspection, component servicing and to take advantage of related product software and
hardware improvements.
Installations that do not meet “normal” industrial operating conditions may require customized
maintenance cycles to maximize reliability, performance, and asset life. Contact your local Woodward
representative for a detailed evaluation of your site conditions to determine the right maintenance cycles
for your installation.
Woodward’s overhaul services will return the unit to “like new” condition ready for another full operating
cycle, lasting until the next planned maintenance outage. Upon reaching the recommended maintenance
cycle of the auxiliary component, please contact either the sites turbine OEM service representative, local
Woodward Distributor or Woodward Authorized Independent Service Facility to facilitate services. See
Chapter 8 for Product Support and Services Options.
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