PIN 2097455 - Caterpillar

Introduction
The information in this section is a supplement to the Checks and Tests of the previous sections. This material is much more descriptive and detailed for the user who is less familiar with these systems. The Troubleshooting Section makes constant references to this section when more detailed information is necessary to complete a test.Service Procedure Index For 2301 Electric Governor
A. Nonparallel Control (Standby Unit)B. Parallel Control (Load Sharing)C. Low Idle Speed AdjustmentD. Actuator Check ProcedureE. Linkage CalibrationF. Power RequirementsG. Speed SettingH. Minimum Fuel SwitchJ. Gain and StabilityK. Magnetic PickupL. DroopM. Load GainN. De-DroopP. PhasingQ. Acceleration RateR. Droop or Isochronous Mode SwitchS. 2301 Bench Performance CheckT. 2301 Operating ConditionsU. Incompatibility of Multiple Load Sharing Control UnitsV. 2301 Overvoltage ProtectionW. Voltage Drop to 2301 Control During Cold Start ConditionsProcedure A
2301 Nonparallel Control (Standby Unit)
2301 NONPARALLEL CONTROL BOX (8N408 SHOWN)
WIRING DIAGRAM FOR 8N408 CONTROLNOTE A: Lube oil Idle Switch maintains Low Idle speed until oil pressure closes switch. Another switch can be added in series for low speed control at the switchgear.NOTE B: A 500 ohm (max.) remote speed setting potentiometer gives approximately 1% speed change per 20 ohms.NOTE C: 20K DROOP potentiometer. Must be left open if not used.NOTE D: Acceleration rate capacitor causes additional acceleration time of 2 seconds per 50 mfd. Must be left open if not used.NOTE E: Shielded wires should be twisted pairs.NOTE F: Ground battery negative to switchgear frame and neutral bus.NOTE G: Install shielded cable directly from component to control box. Do not go through terminal points. Connect shields only at control box grounding stud.NOTE H: Installed on engine by CTCo.NOTE J: For speed range of magnetic pickup, see Magnetic Pickup Frequencies For Electric Governors in Service Procedure K.Procedure B
2301 Parallel Control (Load Sharing)
2301 PARALLEL CONTROL BOX (8N409 SHOWN)
FIGURE 1 WIRING DIAGRAM FOR 2301 PARALLEL CONTROL (8N409)NOTE A: When power is removed for service, open both positive (+) and negative (-) supply leads (terminal T25 when used and terminal T11 if not opened by auxiliary contacts). Prevent leads from making contact with ground or from shorting together if not connected through a switch.NOTE B: Remove jumper between terminals T20 and T21 when remote speed potentiometer is used. A high quality 100 ohm, 10 turn potentiometer is recommended. A resistance of 100 ohms "rheostat connected" will give approximately 4% speed adjustment.NOTE C: For actuators used in tandem (series) operation, connect as shown at bottom of Fig. 1. Put jumper across control terminals T17 and T28 when two actuators in series are used.NOTE D: This control has inside burden resistors. These burden resistors must be connected across power source current transformers while unit is running to prevent the development of high voltage in the leads to these terminals.NOTE E: When the circuit breaker to main bus closes, the contacts of the auxiliary circuit breaker must close pilot relay contacts at the same time. Since only one pilot relay contact is used with the time control, remove the pilot relay contact in line connected to