Description
will be a 50 rpm speed change for each degree of speed setting shaft rotation, however this may vary depending on the speed setting spring used in the governor. Maximum and minimum speed stops are adjusted during factory calibration of the unit. Oil Supply In general, the oil used in the prime mover will be satisfactory for use in the governor. Fill the governor with clean, non-corrosive, oxidation and rust inhibiting oil that has minimum foaming or air retention qualities, and a viscosity of 100–300 SUS (Saybolt Universal Seconds) at operating temperature (typically 140–200 °F/ 60–93 °C). Fill to the line on the sight glass (approximately 2.3 US quart/2.2 L). After start-up, and when the oil is at operating temperature, again check the oil level and add more oil if necessary. Oil should be visible in the sight glass at all times. Oil Viscosities Table 2-1 shows the viscosity of oil at the different operating temperatures. The pour point (low temperature) is shown on the left and the temperature at which the performance of the oil begins to decrease is on the right side. The governor will operate at temperatures near the pour point of the oil, but governor operation will be slow, and may be unstable. Do not operate the governor at a temperature less than the pour point of the oil. Operating the governor at temperatures greater than the high limit (50 SUS), will decrease the stability of the governor, and may result in an inability to restart hot. Operating the governor at a temperature greater than the point at which the performance of the oil decreases can cause governor failure. For specific oil recommendations, see manual 25071, Oils for Hydraulic Controls. Start-up Be sure all of the correct installation procedures have been followed. Start the engine according to the engine manufacturer instructions. Be prepared to make an emergency shutdown when starting the engine, turbine, or other type of prime mover, to protect against runaway or overspeed with possible personal injury, loss of life, or property damage.
5501-471
