Usage:
Receiving the UG Actuator
After factory testing and calibration, the actuator is drained of oil. This leaves a light film of oil on internal parts to prevent rust. External parts are painted or coated with a spray lubricant/rust inhibitor.
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Use care while handling and installing the actuator. Avoid striking the drive shaft, terminal shaft, or the electrical connections. This can cause damage to seals, internal parts, and factory adjustments. Do not set the actuator on its drive shaft. |
Internal cleaning and flushing is not necessary before installation and operation. The oil film inside the actuator is a clean multiviscosity engine oil which will not contaminate the oil selected to operate the actuator.
Fill the actuator with 1.4 liters (1.5 quarts) of oil. Select the oil based on the expected operating conditions of the engine. Use only new, clean oil in the actuator.
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Do not allow dirt or contamination to enter the actuator while filling with operating oil. Do not reuse oil drained from the actuator. Serious governor damage can occur if contaminates are allowed inside the actuator, which in turn can lead to engine overspeed and engine damage. |
Storage
The actuator may be stored for short periods of time (less than one year) as received from the factory. For long term storage (more than one year), fill the actuator with oil.
Drive Shaft Rotation
The drive shaft rotates in one direction only. The rotation, as viewed from the top of the actuator, must be the same as that of the engine drive when looking down on the mounting pad.
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Make sure the engine mounting pad drive and the actuator drive rotation are the same. If the actuator oil pump is rotated in the wrong direction, oil pressure will not be generated in the actuator. Incorrect drive rotation will cause the actuator to become inoperative, and may cause actuator damage. |
Changing the Direction of Rotation
1. Remove the four pump housing screws.
2. Index the pump plate 180 degrees to align the arrow (1) corresponding to the direction of rotation selected with the reference notch (2) in the base.
3. Replace the four screws. Tighten to a torque of ... 9.2 N·m (81 lb in)
4. Make sure that the actuator drive shaft rotates freely.
Orientation
The actuator can be installed in a vertical or near vertical position without affecting the calibration. Do not install more than 45 degrees from vertical.
Drive Connection
Make sure the actuator drive shaft turns freely before installation. The drive gear or coupling must slip freely into the governor drive of the engine. Do not apply external force. The drive must be free of binding, side load or excess end play. Improper alignment or fit between the parts can result in excessive wear, actuator drive seizure, and instability.
Mount the actuator squarely on the mounting pad. Torque the mounting bolts to 47 ± 9 N·m (35 ± 7 ft lbs) evenly. There can be no movement or rocking of the actuator on the engine mounting pad.
Control Linkage
The terminal shaft rotates 42 degrees. Use 2/3 of the total rotation between no load and full load. The additional "overtravel" should be divided by two and used at both ends of the terminal shaft travel. This will provide maximum fuel when required and assure shutdown at minimum fuel actuator position.
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To prevent serious injury or loss of life, be sure to allow sufficient overtravel at each end of the terminal shaft. This allows the actuator to shut down the engine, and allows the actuator to give maximum fuel when required. Misadjusted linkage may prevent the actuator from shutting down the engine in an emergency. |
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Installed linkages must operate smoothly and be free of binding and lost motion due to worn parts. If there is a collapsible member in the linkage, be sure it does not yield each time the actuator moves the linkage rapidly.
Oil Supply
Oil grade selection is based on the operating temperature range of the actuator. Many operation and maintenance problems associated with actuators are directly related to the selection and condition of the oil in the actuator. Use care in the selection of the oil for the actuator. Refer to the 3600 Series Diesel Engine Fluids Recommendations, SEBU7003.
The oil used in the actuator is both a lubricating oil and a hydraulic oil. It must have a viscosity index that allows it to perform over the operating temperature range. The oil that is used must have the proper blending of additives that cause it to remain stable and predictable over this range.
The actuator is designed to give stable operation with most oils, if the fluid viscosity at the operating temperature is within a 50 to 3000 SUS (Saybolt Universal Seconds) range. Refer to the chart above. Poor actuator response or instability is an indication that the oil is too thick or too thin.
The actuator oil must be compatible with seal material (i.e. nitrile, polyacrylic, and fluorocarbon). Most diesel engine oils, industrial lubricating oils, and other oils of mineral or synthetic origin meet these requirements.
Upon receiving the actuator, it should be filled with 1.4 liters (1.5 quarts) of oil. The oil should come to the full mark on the sight glass. After the engine is started and the actuator is at operating temperature, add oil to the full mark if necessary. Oil must be visible in the sight glass under all operating conditions.
Electrical Connection
The electrical connector on the actuator is a three pin plug connector. Note that pin C is not used. Refer to the schematic below.
