Manual 26727
VariStroke-I (VS-I) Electro-hydraulic Actuator
Woodward
83
Chapter 7.
Repair and Troubleshooting
To prevent possible serious personal injury, or damage to equipment,
be sure all electric power, hydraulic pressure, and rod end force have
been removed from the actuator before beginning any maintenance or
repairs.
Due to typical noise levels in turbine environments, hearing protection
should be worn when working on or around the VS-I actuator.
General
The VariStroke-I is warranted to be free from defects in materials and workmanship, when installed and
used in the manner for which it was intended, for a period of 36 months from the date of shipment from
Woodward.
It is recommended that all repairs and servicing of the VS-I be performed by Woodward or its authorized
service facilities.
Use of a cable gland or stopping plug that does not meet the hazardous area certification requirements,
thread form, or thread size will invalidate the suitability for hazardous locations.
Never remove or alter the nameplate as it bears important information, which may be necessary to
service or repair the unit.
Shaft Seal Replacement
Shaft seal replacement kits may be ordered from Woodward corresponding to product bore sizes as
follows:
4” Bore: 8935-1216-10
5” Bore: 8935-1216-12
6’´Bore: 8935-1216-15
8” Bore: 8935-1216-20
10” Bore: 8935-1216-25
Refer to Figure 7-1 which displays all part numbers corresponding to each seal kit. The location and
assembly orientation of each kit component must be installed as depicted in Figure 7-1.
Released
