CHAPTER 12 MAINTENANCE OF ELECTRIC HYDRAULIC ACTUATOR

Figure 12-1. Speed Setting Adapter Plate

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
Page Navigation
162

TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 CHAPTER 12 MAINTENANCE OF ELECTRIC HYDRAULIC ACTUATOR 12-1. GENERAL. The electric hydraulic governing system controls the engine speed, either independently, in parallel with other sets, or with commercial power. Components of the system include the electronic governor controller A106, and the hydraulic governor actuator. The governor actuator is a proportional actuator with a backup centrifugal governor. The actuator has a transducer which directs oil pressure to actuate the fuel control mechanism on the engine. The governor actuator has two major sections, the electric governor section, and the centrifugal governor section. 12-2. TEST. The following test is required after repair or overhaul using a test stand. a. Recommended Tools. Recommended tools are listed in tables 2-1 and 12-1. shown in figure 12-1, to hold speed adjustment screw. (4) Turn spring seat (56, figure 12-3) until the pilot valve plunger for the actuator gently bottoms, then back off two turns. Screw spring seat screw (56) until actuator's power piston (152, figure 12-3) is all the way up, eliminating interference from the actuator. (5) Check pointer alignment with maximum position on dial plate by rotating terminal shaft in the increase fuel direction until the power piston is all the way up. Table 12-1. Recommended Tools Electric Hydraulic Actuator PART NUMBER NAME 8909-032 Test Stand 8909-038 Centering Box 8959-028 Electronic Counter 8959-031 Magnet Pickup 370109 Pilot Valve Wrench 110-A Gauss Meter, Bell Model b. Preliminary Steps. (See figures 12-1, 12-2, 12-3 and 12-4.) (1) Mount unit on test stand and connect oil inlet, pump pressure and drain connections (see figure 12-4). A minimum oil pressure of 5 psi (0.07 kg/cm²) at a temperature of 140 to 150°F (60 to 66°C) is required. (2) Drive the unit in the normal clockwise direction of rotation. (3) Remove cover (13, figure 12-3) and use adapter plate NOTE This is important since the unit operates below minimum position due to the linkage arrangement between the actuator and governor. The unit becomes unstable when operated below minimum. This check of the dial plate and pointer position insures that the unit is operating in its correct range. (6) Surge the unit by setting speed droop to zero and opening needle valve (92). Zero speed droop is set when the pin on bracket (32) is on a centerline 12-1

Privacy Statement
Press Release
Contact