PUMP GP-MAIN HYDRAULIC 5511122 - Caterpillar

Procedure For Load Testing The Engine
8.27.2.1: Locomotive Equipped with Self Load Feature1. Switch it to self load. Perform all the normal Railroad safety procedures.2. Confirm that the electronic governor is in self load mode by noting the status of the lower four LED's on the front face of the main electronic governing box. The lower three should be off and the 4th should be on continuously.3. Run the engine in each notch loaded and note the following parameters and enter them in a copy of Table 1: Generator output currentGenerator output voltageEngine speedGenerator current sense (TB391-L10 to TB391-L9)Generator voltage sense (TB391-L11 to TB391-L9)Excitor current (use 0.1 ohm, 25 watt resistor as a shunt)Rack position (Use Caterpillar Service Tool 8T1000, refer to Special Instruction, SEHS8623) An accessory kit (Probe Contactor Point Group 6V6042) is available that contains a selection of different length extensions for the 8T1000 sensor. The correct extension is the same for all 3500 engines. The correct extension should be chosen so that the 8T1000 rack sensor will properly display shut-off rack position as sell as the maximum mechanical position. All 3500 engines require the sensor to be set up to display increasing rack with a retracting sensor. Calibrate the 8T1000 sensor with the linkage manually held against the mechanical rack stop prior to performing the load test procedure.4. Compute the