The standard UG-Actuator provides a maximum work capacity of 19.4 J (14.3 ft-lb) in the increase direction, and 23.3 J (17.2 ft-lb) in the decrease direction. A special actuator is available which provides 27.1 J (20.0 ft-lb) of work in both directions. Another special actuator is the remote actuator which does not have a drive shaft. Pressurized oil (758–2758 kPa/110–400 psi) must be supplied to the actuator. The remote actuator has 27.1 J (20.0 ft-lb) when supplied with 2758 kPa/400 psi. Work capacity is based on the full 42 degree travel of the terminal (output) shaft. Rated work capacity is 2/3 of maximum work capacity.
The actuator can be built with a low speed pump for speed ranges of 375 to 1100 rpm, or with a high speed pump for 600 to 1500 rpm.
The UG-Actuator is available with an LVDT for position feedback. The LVDT is not available with the MPU option. With the LVDT, the actuator has a 10-pin connector on the cover. The actuator may be equipped with a special gear and magnetic pickup, using the governor drive to sense engine speed. This permits an added convenience when converting from a UG hydraulic-mechanical governor to an electronic control system. Low cranking speeds may require override of the electronic failsafe. The MPU option is not available with the 27.1 J (20.0 ft-lb) work capacity UG-Actuator.
The UG-Actuator output is directly proportional to a 20 to 160 mA signal from an electronic control system.
This manual provides outline drawings to show the base and drive configurations. The outline drawings include information on electrical wiring, installation dimensions, drive requirements, oil requirements, and output shaft dimensions. The drawings are provided for reference only. Do not use the drawings for construction.