SEAL-O-RING 3P0649 - Caterpillar

Test Step 1. PERFORM THE INITIAL CHECK
Turn off the genset.
Illustration 1 g01021519
The Cat K65-12B Voltage Regulator presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death. Service by trained personnel only.The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed.
Check for loose terminals.
Check for corroded terminals.
Check for proper connections between the voltage regulator and the generator.Expected Result:All initial checks show no problems.Results:
OK - There are no loose terminals or corroded terminals. The connections are correct. Proceed to test step 2.
Not OK - One or more of initial checks shows a problem.Repair: Tighten loose terminals. Replace corroded terminals. If the connections are incorrect, connect the wiring properly according to the wiring diagram. Stop.Test Step 2. CHECK METERS
Start the genset.
Run the genset at no load.
Illustration 2 g01021519
The Cat K65-12B Voltage Regulator presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death. Service by trained personnel only.The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed.
Ensure the accuracy of the voltmeter. If you are reading the voltage from the control panel, check that voltage with a multimeter.Note: Take the voltage readings on terminals 20, 22 and 24 at the regulator.Note: The step-down ratio of the potential transformers must be taken into consideration when these voltages are measured. The voltage that is measured will be different from the value on the meter. Multiply the measured value by the step-down ratio of the transformer. This value should be equal to the value that is shown on the meter.Expected Result:Meters are accurate.Results:
OK - Meters' readings are accurate. Proceed to test step 3.
Not OK - The meters' readings do not match.Repair: Troubleshoot the metering circuit. Verify the schematic for the metering circuit. Verify whether the meters are connected correctly. Stop.Test Step 3. CHECK CONNECTIONS OF THE VOLTAGE ADJUST RHEOSTAT
Turn off the genset.
Illustration 3 g01021519
The Cat K65-12B Voltage Regulator presents an electrical shock/electrocution hazard. This hazard will cause serious injury or death. Service by trained personnel only.The terminals and heat sinks are live at hazardous voltages when power is applied and for up to 8 minutes after power is removed.
Check if there is the jumper between terminals 4 and 7.Expected Result:There is a jumper that is placed between terminals 4 and 7.Results:
OK - If a remote voltage adjust rheostat is NOT used, the jumper is properly installed. Proceed to test step 5.
OK - If a remote voltage adjust rheostat is used, the jumper should be removed from terminals 4 and 7. In this case, the remote voltage adjust rheostat should be connected to terminals 6a and 7. Proceed to test step 4.
Not OK - There is no jumper between terminals 4 and 7. The regulator may go into the overexcitation shutoff.Repair: Verify the wiring schematics. Install the jumper in accordance with the wiring schematic. Stop.Test Step 4. CHECK THE RESISTANCE OF THE REMOTE VOLTAGE ADJUST RHEOSTAT
Disconnect the wires