a. See figure 13-3 to perform the valve and pistontest.b. Connect dc power supply (ps) and switch (S1)to J6 as illustrated. Connect voltmeter (Ml) withresistor (Rl) to pins A and B of J4.c. Attach gage G1 and G2 as shown. Connect hy-draulic power source (310-320 psi, 2 gpm) and gageG3 and provide a return line from port R to thehydraulic sump.d. To adjust the valves, remove the large roundcover and replace it with a similar diameter collarwhich will allow access to the adjustment screws andjam nuts. This is necessary to contain the hydraulicfluid which is ported within this cover.e. With hydraulic power but no electric power,applied, adjust the valve with Allen set screw toyield 200 psi - 10 psi at Al port (gage Gl) and 150 psi+10 psi at A2 port (gage G2). (See figure 13-3.)CAUTION Avoid overadjusting to prevent press-ures or forces which could bend valve push rods.f. After adjusting, lock Allen adjusting screwswith jam nuts, and install cover.g. Set S1 to the center position (solenoid coils inseries). Apply 350 ± 20 ma through the coils. Pre-ssures at Al and A2 ports shall remain the same(para 13-6.e).h. Set switch Sl to connect power (PS) to coil L2and apply 700 ma ± 40 ma. Pressure at Al port(gage Gl) shall be 310 to 400 psi. pressure at A2port (gage G2) shall be 0 to 20 psi.i .Set switch Sl to connect power (PS) to coil L1and apply 700 ma ± 40 ma. Pressure at Al port(gage Gl) shall be 0 to 40 psi and pressure at A2port (gage G2) shall be 310 to 400 psi.13-7. Throttle Position Transducer Test.a. With voltmeter (Ml), resistor (Rl) and 120(+ 1%, 60 Hz) power source connected as shown infigure 13-3, move piston to fully open throttle pos-ition.b. With the transducer body locked in place byits set screw, loosen the transducer core set screwand move the core relative to the body until a min-imum voltage (0, 5 to 2.5 volts) is obtained on thetransducer secondary, as indicated on Ml.c. Move the piston gradually towards the fullyclosed throttle position.The transducer secondaryvoltage, indicated by meter Ml shall increase in alinear manner to a maximum of 48 to 55 volts.d. Repeat these adjustments until the transducersecondary voltage increases linearly from the low-est possible value to a maximum value over theentire 1.0 inch displacement of the piston.e. When final adjustment is made, lock the trans-ducer core in place with the transducer core setscrew.f. Remove the gages, meter, and power supplies.13-8. Installation.a. Install the hydraulic actuator with attachinghardware. (fig. 13-1.)b. Connect hydraulic pressure and return lines tothe–actuator pressure and return parts. Differentline sizes prevent inadvertent crossing of lines.(fig. 13-2. )C. Connect electrical connectors J24 and J25.Electrical connectors cannot be interchanged due todiffering number of pins. (fig. 13-2.)d.13-913-9.a.Attach rod-ends, shaft and clevis.Adjust the linkage in accordance with para.Throttle Linkage Adjustment.Place the Stop-Run-Start switch in the RUNposition. (DO NOT- start the set.)b. Place the battle short switch in the OVER-RIDE or UP position.c. Remove the bolt connecting the linkage rod tothe fuel injection pump shut-off arm.d. Starting at the full counter clockwise position,move the fuel injection pump shut -off arm clockwiseuntil a slight resistance is felt. When this resistanceis felt, hold the shut-off arm in that position.NOTEThis resistance is the fuel injectionpump linkage coming into contactwith the arm which moves the met-ering valve and starts in the direc-tion of no fuel.e. Move the actuator piston to the full OPEN(DOWN) position.f. Make the necessary adjustment to the link-age rod, such that it will fit between the actuatorpiston and the fuel injection pump shut-off arm.g. Start the generator set. Refer to the Operatorand Organizational Maintenance Manual.h. Observe the frequency meter on the panel inthe control cubicle.13-4
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business