HEAD-FLANGE 8T6676 - Caterpillar

Illustration 1 g00933725
Schematic of the circuit for the switch (bed raise)
If the POD is completely blank at all times, refer to Troubleshooting, "POD Does Not Illuminate".Test Step 1. INCREASE THE LOAD IN THE TRUCK'S BODY
Increase the payload by 9 metric tonne (10 u s ton) or more. Expected Result:Dashes are shown on the display of the POD while the truck is rocking from the load that was placed in the truck and the payload registers on the display of the POD when the rocking stops.Results:
OK - Dashes are shown on the display of the POD while the truck is rocking from the load that was placed in the truck and the payload registers on the display of the POD when the rocking stops. The payload system is functioning correctly. Exit this procedure.STOP
NOT OK - The payload did not register on the display. Proceed to Test Step 2.Test Step 2. CHECK THE SUSPENSION CYLINDERSVerify that the conditions that are listed below are not present.
The suspension cylinders are NOT sticking when the truck is empty.
The suspension cylinders are NOT bottoming out when the truck is loaded.The service technician can verify that the conditions that are listed above are present by riding in the truck during the loading operation. The service technician can observe the operation of the four suspension cylinder pressure sensors with the "View Real Time" option of the WinTPMS program. Compare the signal outputs of the four sensors. Verify that all of the sensors respond to the loading of the truck in the same manner.Expected Result:The conditions that are listed above are not present. Results:
YES - The conditions that are listed above are not present. Proceed to 3.
NO - The conditions that are listed above are present.Repair: Service the suspension cylinder in accordance with the Special Instruction, SEHS9411, "Suspension Cylinder Charging".STOPTest Step 3. CHECK THE BED RAISE SWITCH
Place the hoist lever in "Float" position.
Start the engine and put the shift lever in the reverse position. Expected Result:The transmission goes into reverse. Results:
OK - The transmission goes into reverse. The bed raise switch is operating correctly. Proceed to Test Step 6.
NOT OK - The transmission does not go into reverse. The bed raise switch is not operating correctly. Proceed to Test Step4.Test Step 4. CHECK THE ADJUSTMENT OF THE BED RAISE SWITCH
Check the bed raise switch for proper adjustment. Note: Refer to the Service Manual for the truck that you are troubleshooting for the proper procedure.Expected Result:The switch adjustment is correct.Results:
OK - The switch adjustment is correct. Proceed to Test Step 5.
NOT OK - The switch adjustment is not correct.Repair: Adjust the switch according to the specifications in the truck's Service Manual.STOPTest Step 5. CHECK THE BED RAISE SWITCH
Verify the connections to the bed raise switch, refer to the truck's Electrical Schematic.
Disconnect wire 202-BK(Black) from terminal 3 on the bed raise switch.
Measure the resistance between terminal 3 and 4 of the bed raise switch as you move the switch from the RAISE to the FLOAT position. Expected Result:The resistance changes