MIRROR AS 1506582 - Caterpillar

Woodward UG-8 Governor
Electric Set Application When Frequency Control is Important)
There is no direct mechanical link between the governor weights and fuel rack. Movement of the rack is done by a hydraulic piston which is operated by action of the governor weights and a compensating piston.
WOODWARD UG-8 GOVERNOR
1. Synchronizing motor. 2. Synchronizer knob. 3. Speed droop knob. 4. Compensating pointer. 5. Synchronizer indicator. 6. Load limit knob. 7. Plug.Engine rpm is controlled by changing the compression of the governor spring. An A.C. motor (1) installed on the top of the governor permits remote control of the spring compression.Synchronizer knob (2) on the governor permits control of the same function (engine rpm). The synchronizer indicator (5) below the synchronizer knob, gives an indication of the number of revolutions of the synchronizer knob and the amount of compression of the governor spring.A speed droop knob (3) permits a means of changing the difference between FULL LOAD rpm and HIGH IDLE (without load) rpm. Any difference between HIGH IDLE rpm and FULL LOAD rpm is called "DROOP" and this difference in rpm divided by the FULL LOAD rpm is called "DROOP PERCENTAGE". At zero droop the rpm is the same, either with or without load. This droop control permits the use of two or more electric sets to operate a common load (in parallel). Only one of the electric sets (with zero droop) feels the difference in power needs and permits the increase or decrease in power. The electric set or sets with high droop governors control the constant load.A load limit knob (6) is for the operator to manually control the engine rpm. This knob gives a positive stop to linkage movement and gives the operator a fast way to stop the engine. The load limit knob also can be used to make a gradual reduction in engine rpm.Compensating pointer (4) gives the governor a fine degree of adjustment control. Detailed information about governor adjustment is in TESTING AND ADJUSTING.Plug (7) covers an adjustment screw that permits the operator to release (bleed) air from the governor hydraulic system. Loosening the screw causes the hydraulic components to move rapidly and remove air from the system. Final adjustment of the needle valve controls governor action.Automatic Start/Stop Systems
COMPONENT LOCATION FOR AUTOMATIC START/STOP SYSTEM; UG-8 GOVERNOR
1. Load. 2. Transfer switch with initiating contactor. 3. Rack shutoff solenoid. 4. Overspeed contactor. 5. Water temperature contactor. 6. Commercial power source. 7. Oil pressure contactor. 8. Emergency power. 9. Starting motor and solenoid. 10. Fuel pressure switch. 11. Battery. 12. Engine. 13. Control panel. 14. Overcrank timer. 15. ON/ OFF/STOP switch. 16. AUTOMATIC/MANUAL switch. 17. Shutdown relay. 18. Initiating relay. 19. Auxiliary relay. 20. Run relay.Two arrangements of the automatic start/stop system are available. The first is the Woodward UG-8 Governor application. The second is the Woodward 2301 Electric Governor application.These systems automatically start the engine and connect the load to the generator set when the commercial power source is stopped. These systems automatically disconnect the generator set