Woodward TG-10E, Installation And Operation Manual

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Manual 04045 TG-10E/-13E/-17E Actuator
Woodward 9
For TG actuators which do not require a drive, but require a customer-supplied
oil pressure source, see Figure 3-4 for oil line connections. The external oil
pressure source must supply 1 to 4 gal/min (4 to 15 L/min) flow to regulate
accumulator between 150 and 170 psi (1034 and 1172 kPa). Supply oil must be
filtered to 25 µm (absolute). The TG actuator is fitted with a –6 filter fitting (70 µm
absolute) and a –10 drain fitting.
Replace the actuator oil if it is contaminated. Also, change the oil if it is
suspected of contributing to actuator instability. Drain the oil while it is still hot
and agitated, and flush the actuator with a clean solvent having some lubricity
(such as fuel oil or kerosene) before refilling with new oil. If drain time is
insufficient for the solvent to completely drain or evaporate, flush the actuator
with the same oil that will be used to refill. This will avoid dilution and possible
contamination of the new oil. To avoid recontamination, the replacement oil
should be free of dirt, water, and other foreign material. Use clean containers to
store and transfer oil.
WARNING—SOLVENTS
Observe manufacturer’s instructions or restrictions regarding the use of
solvents. If no instructions are available, handle with care. Use cleaning
solvent in a well ventilated area away from fires or sparks. Improper use of
solvents can cause personal injury and/or property damage.
Oil that has been carefully selected to match the operating conditions and is
compatible with actuator components should give long service between oil
changes. For actuators operating under ideal conditions (minimum exposure to
dust and water and within the temperature limits of the oil), oil changes can be
extended.
If available, a regularly scheduled oil analysis is helpful in determining the
frequency of oil changes. Any persistent or reoccurring oil problems should be
referred to a qualified oil specialist for solution.
The recommended continuous operating temperature of the actuator is 140 to
200 °F (60 to 93 °C). Measure the temperature of the actuator on the outside
lower part of the case. The actual oil temperature will be approximately 10
Fahrenheit degrees (6 Celsius degrees warmer).