Hydraulic Amplifier (Electrical Input)
Manual 89015
ii
Woodward
Illustrations and Tables
Figure 1-1. 5-
1/4” Hydraulic Amplifier with Optional Connector and Optional
Output Shaft Scale ............................................................................. 3
Figure 1-2. 5-
1/4” Hydraulic Amplifier Dimensions ................................................. 4
Figure 1-3. 7-
1/4” Hydraulic Amplifier Dimensions ................................................. 5
Figure 3-1. Schematic of Hydraulic Amplifier ......................................................... 9
Figure 3-2. Schematic of Hydraulic Amplifier (plug, solid pilot valve plunger) .....10
Figure 3-3. Schematic of Hydraulic Amplifier (transfer valve, yield plunger, 3-way
valve) ...............................................................................................11
Figure 3-4. Schematic of Hydraulic Amplifier (yield plunger, transfer valve in
closed position) ................................................................................12
Figure 4-1. Test Circuit for the Hydraulic Amplifier ...............................................13
Figure 4-2. Micarta Block for Holding Pilot Valve Plunger Open ..........................14
Figure 4-3. Test Hookup for Checkout and Adjustment of the EG-3P Actuator ...15
Figure 5-1a. Parts for Electrically Controlled Hydraulic Amplifier (sheet 1) .........19
Figure 5-1b. Parts for Electrically Controlled Hydraulic Amplifier (sheet 2) .........21
Figure 5-2. Parts for EG-3P Actuator ...................................................................24
Table 4-1. Troubleshooting Chart for EG-3P Actuator .........................................15
Table 4-2. Troubleshooting Chart for Hydraulic Amplifier ....................................16