WIPER-ROD 5J8156 - Caterpillar

Test Step 1. PERFORM THE INITIAL CHECK
Turn off the genset.
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:
YES - There are no loose terminals or corroded terminals. The connections are correct. Proceed to test step 2.
NO - 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.STOPTest Step 2. CHECK METERS
If attached, disconnect any PF/VAR controller from the VR6 voltage regulator. Place a jumper across terminals 2 and 3 of the VR6 voltage regulator.
Start the genset.
Run the genset at no load.
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 and 22 at the regulator. Also take voltage readings on terminal 24 if 3 phase sensing is used.Expected Result:Meters are accurate.Results:
YES - Meter readings are accurate. Proceed to test step 2.
NO - The meter readings do not match.Repair: Troubleshoot the metering circuit. Verify the schematic for the metering circuit. Verify whether the meters are connected correctly.STOPTest Step 3. CHECK CONNECTIONS OF THE VOLTAGE ADJUST POTENTIOMETER
Turn off the genset.
The Cat VR6 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:
YES - If a remote voltage adjust potentiometer is NOT used, the jumper is properly installed. Proceed to test step 4.
YES - If a remote voltage adjust potentiometer is used, the jumper should be removed from terminals 4 and 7. In this case, the remote voltage adjust potentiometer should be connected to terminals 6A and 7. Proceed to test step.
NO - 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.STOPTest Step 4. CHECK THE RESISTANCE OF THE REMOTE VOLTAGE ADJUST RHEOSTAT
Ensure that the generator set is stopped.
Disconnect the wires from terminals 6A and 7.
Measure the resistance of the remote voltage adjust potentiometer while the potentiometer is being adjusted over the operating range.Expected Result:The resistance should be between zero (0) Ohms and 10 K Ohms 0.5 K Ohm.Results:
Yes - The resistance increases smoothly within the specified range. Proceed to test step 5.
No - The resistance is not within the specified value. The resistance jumps to a high value when the potentiometer is adjusted.Repair: Replace the remote voltage adjust potentiometer.STOPTest Step 5. CHECK CONNECTIONS FOR THE DROOP CURRENT TRANSFORMER (CT)
Stop the genset.
For a 1 A CT, verify that the connections are to terminals 5 and 6.
For a 5 A CT, verify that the connections are