MOTOR GP-BROOM 4304316 - Caterpillar

Table 1
Parameters for the Status Screens on Cat ET
Screen 1
Group 8 Screen 2
Group 9
"Cylinder #1 Transformer Secondary Output Voltage Percentage" "Cylinder #2 Transformer Secondary Output Voltage Percentage"
"Cylinder #3 Transformer Secondary Output Voltage Percentage" "Cylinder #4 Transformer Secondary Output Voltage Percentage"
"Cylinder #5 Transformer Secondary Output Voltage Percentage" "Cylinder #6 Transformer Secondary Output Voltage Percentage"
"Cylinder #7 Transformer Secondary Output Voltage Percentage" "Cylinder #8 Transformer Secondary Output Voltage Percentage"
"Cylinder #9 Transformer Secondary Output Voltage Percentage" "Cylinder #10 Transformer Secondary Output Voltage Percentage"
"Cylinder #11 Transformer Secondary Output Voltage Percentage" "Cylinder #12 Transformer Secondary Output Voltage Percentage"
"Cylinder #13 Transformer Secondary Output Voltage Percentage" "Cylinder #14 Transformer Secondary Output Voltage Percentage"
"Cylinder #15 Transformer Secondary Output Voltage Percentage" "Cylinder #16 Transformer Secondary Output Voltage Percentage"
Start the engine. Apply the normal load at rated speed. Allow the engine to warm up to normal operating temperature.
Observe the value of the output for the secondary circuit of each transformer. Expected Result:The displayed value of the output for the secondary circuit of each transformer is between 1 and 90 percent.Results:
OK - The displayed value of the output for the secondary circuit of each transformer is between 1 and 90 percent. The ignition system components are operating properly.Repair: Investigate other possible root causes of the problem. Troubleshoot the symptom. Refer to Troubleshooting, "Troubleshooting Without A Diagnostic Code".STOP
Not OK - At least one of the outputs displayed a value of 0 percent or a value that is greater than 90 percent. The ignition system components require maintenance. Proceed to Test Step 2.Test Step 2. Inspect the Transformer
Ignition systems can cause electrical shocks. Avoid contacting the ignition system components and wiring.Do not attempt to remove the valve covers when the engine is operating. The transformers are grounded to the valve covers. Personal injury or death may result and the ignition system will be damaged if the valve covers are removed during engine operation. The engine will not operate without the valve covers.
Set the engine control to the OFF/RESET mode. Switch the 35 amp circuit breaker OFF.
Illustration 3 g01342727
Section view of the cylinders
(9) Cover
(3) Transformer
(2) 3-pin connector
Remove cover (9) for the suspect cylinder.
Pulling on the wiring harness may break the wires. Do not pull on the wiring harness.
Disconnect the ignition harness from 3-pin connector (2). Remove transformer (3) from the engine.
Illustration 4 g01342728
Ignition transformer and spark plug
(3) Transformer
(4) Extension
(5) Secondary terminal for the spark plug
(6) O-ring seal
Inspect the body of transformer (3) and extension (5) for corrosion and/or for damage. Inspect the spark plug (5) for corrosion and/or for damage.
Inspect the connection between the transformer (3) and the extension (5) in order to ensure that the connection is not loose.
Inspect internal O-ring seal (6) for damage.
The extension has an internal terminal for the spark plug. Inspect the terminal for looseness, for corrosion, and/or for damage. Insert a spark plug into the extension and check the terminal for spring pressure.
The extension can be scratched and damaged with a wire brush. Do not use a wire brush on the extension.
Clean any deposits from the inside of the