Woodward EG-3P Installation And Operation Manual
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Summary of Contents for Woodward EG-3P
- Page 1 Installation and Operation Manual EG-3P Actuator including EG-1P, EG-3P with compensation, EG-3P oil motor, and EG-3P oil pump Manual 82560 (Revision L)
- Page 2 Revisions—Text changes are indicated by a black line alongside the text. Woodward Governor Company reserves the right to update any portion of this publication at any time. Information provided by Woodward Governor Company is believed to be correct and reliable. However, no responsibility is assumed by Woodward Governor Company unless otherwise expressly undertaken.
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Page 3: Table Of Contents
Figure 2-1. Recommended Actuator Output Shaft Travel Adjustment ....9 Figure 2-2. Actuator Test Circuit ................11 Figure 4-1a. Exploded View (EG-3P with Gear Pump) ........16 Figure 4-1b. Exploded View (EG-3P with Oil Motor)..........17 Figure 4-2. Plug Location for Oil Pump ..............18 Figure 4-3. - Page 4 EG-3P Actuator Manual 82560 Woodward...
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Page 5: Chapter 1. General Information
Manual 82560 EG-3P Actuator Chapter 1. General Information 2301 Electric Governor The 2301 electric governor is one in which its actuator output (terminal) shaft position is directly proportional to the input signal from its electric control unit. It can be used in an isochronous (constant speed) mode for single engine operation or when paralleled with similar units on an isolated bus. -
Page 6: Eg-3P Actuator
The EG-3P has 4.5 ft-lb (6.1 J) of stalled work capacity, a useful work capacity of 3 ft-lb (4 J), and a maximum 42° output shaft travel. Torque rating is 6.0 lb-ft (8.1 N m). - Page 7 (not furnished by Woodward). An EG-3P actuator can be furnished with or without a drive shaft. The drive shaft of a unit fitted with such a shaft can be driven by the prime mover or some other means to provide relative rotation between the pilot valve plunger and bushing and to rotate the oil pump gears.
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Page 8: Figure 1-1. Eg-3P Schematic
The pilot valve plunger is centered when its control land exactly covers the control port in the pilot valve bushing. The greater of two forces moves the pilot valve plunger up or down. When the forces are equal, the plunger does not move. Figure 1-1. EG-3P Schematic Woodward... -
Page 9: Eg-3P Actuator (With Compensation)
EG-3P Actuator (with Compensation) Description Many EG-3P actuators operate with oil supplied directly from the prime mover. Certain multi-viscosity motor oils require a compensation system within the actuator to provide needed stability. -
Page 10: Figure 1-2. Eg-3Pc Schematic
EG-3P Actuator Manual 82560 Figure 1-2. EG-3PC Schematic Buffer System With a fuel change, the new position taken by the loading piston changes the pressure of the compensation oil, temporarily. The new pressure causes a pressure difference across the compensation land and this assists in re- centering the plunger. -
Page 11: Figure 1-3. Needle Valve Location
EG-1 may be ordered from this manual as well as parts for the EG-3P and EG-3PC actuators. Needle Valve Adjustment The needle valve is factory set at two turns out from closed. If instability is experienced during operation with cold multi-viscosity oils the needle valve can be turned in until stability is obtained. -
Page 12: Figure 1-4. Parts For Compensation
EG-3P Actuator Manual 82560 Parts Six additional parts are added to the base for the EG-proportional-compensated actuator. The configuration of the base is also slightly changed. The additional parts are shown in Figure 1-4. A needle valve with O-ring is added to the case. -
Page 13: Chapter 2. Installation
Manual 82560 EG-3P Actuator Chapter 2. Installation Introduction Take care to mount the actuator “square” with the engine (or turbine) linkage. If the actuator is one driven by the engine or some other source, a gasket should be placed between the base and the base mounting pad. The gasket must not block the two drain holes adjacent to the centering pilot of the base (see Figure 4-3). -
Page 14: Factory Adjustments
EG-3P Actuator Manual 82560 NOTE Maximum work capacity over full governor travel of 42° is *. See Figure 2-1 for recommended governor output travel. In special applications, min and max prime mover stops may be outside the governor stops. *—See Table 1-1 for values. -
Page 15: Figure 2-2. Actuator Test Circuit
Manual 82560 EG-3P Actuator Pilot Valve Centering Refer to Figure 4-1b (oil motor model), for the item numbers used in the following information. Initial adjustment consists of physically centering the magnet (74) between the coils of the transducer (100) when the control land on the pilot valve plunger (81) is centered over the control port in the pilot valve bushing (26). - Page 16 EG-3P Actuator Manual 82560 Set the test switch to CENTER and adjust the potentiometer for 400 mA on the milliammeter. Set the test switch to OFF. Insert a 1/8 inch Allen wrench through the clearance hole in the center of the cover, and engage the adjustable spring seat.
- Page 17 The shaft-driven EG-3P actuator (most often used) requires about 3/4 volt to move the terminal shaft from the minimum stop. Six or seven volts are required to move the terminal shaft to maximum stop. Some EG-3P actuators require less voltage for full travel.
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Page 18: Chapter 3. Troubleshooting
EG-3P Actuator Manual 82560 Chapter 3. Troubleshooting This chapter gives instructions for checking actuator and prime mover operation. See appropriate manual for troubleshooting your 2301 governor system. Check the load to be sure that speed changes are not the result of unusual load variations. -
Page 19: Chapter 4. Replacement Parts
Manual 82560 EG-3P Actuator Chapter 4. Replacement Parts When requesting additional information concerning governor operation or when ordering parts, the following information must accompany the request: • Governor serial number (shown on nameplate) • Manual number (this is manual 82560) •... -
Page 20: Figure 4-1A. Exploded View (Eg-3P With Gear Pump)
EG-3P Actuator Manual 82560 Figure 4-1a. Exploded View (EG-3P with Gear Pump) Woodward... -
Page 21: Figure 4-1B. Exploded View (Eg-3P With Oil Motor)
Manual 82560 EG-3P Actuator Figure 4-1b. Exploded View (EG-3P with Oil Motor) Woodward... -
Page 22: Figure 4-2. Plug Location For Oil Pump
EG-3P Actuator Manual 82560 Figure 4-2. Plug Location for Oil Pump Woodward... -
Page 23: Figure 4-3. Outline Drawing (Eg-3P With Gear Pump)
Manual 82560 EG-3P Actuator Figure 4-3. Outline Drawing (EG-3P with Gear Pump) Woodward... -
Page 24: Figure 4-4. Outline Drawing (Eg-3P With Oil Motor)
EG-3P Actuator Manual 82560 Figure 4-4. Outline Drawing (EG-3P with Oil Motor) Woodward... -
Page 25: Figure 4-5. Outline Drawing (Eg-3P With Oil Pump)
Manual 82560 EG-3P Actuator Figure 4-5. Outline Drawing (EG-3P with Oil Pump) Woodward... -
Page 26: Chapter 5. Service Options
Product Service Options The following factory options are available for servicing Woodward equipment, based on the standard Woodward Product and Service Warranty (5-01-1205) that is in effect at the time the product is purchased from Woodward or the service is performed: •... -
Page 27: Returning Equipment For Repair
Returning Equipment for Repair If a control (or any part of an electronic control) is to be returned to Woodward for repair, please contact Woodward in advance to obtain a Return Authorization Number. When shipping the item(s), attach a tag with the following information: •... -
Page 28: Replacement Parts
To expedite the repair process, contact Woodward in advance to obtain a Return Authorization Number, and arrange for issue of a purchase order for the item(s) to be repaired. No work can be started until a purchase order is received. -
Page 29: Engineering Services
Manual 82560 EG-3P Actuator Engineering Services Woodward Industrial Controls Engineering Services offers the following after- sales support for Woodward products. For these services, you can contact us by telephone, by email, or through the Woodward website. • Technical Support •... -
Page 30: Technical Assistance
Type of Fuel (gas, gaseous, steam, etc) Rating Application Control/Governor Information Please list all Woodward governors, actuators, and electronic controls in your system: Woodward Part Number and Revision Letter Control Description or Governor Type Serial Number Woodward Part Number and Revision Letter... - Page 32 Phone +1 (970) 482-5811 • Fax +1 (970) 498-3058 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.