GEAR-ACCESSORY DRIVE 2W8350 - Caterpillar

Note: Refer to Troubleshooting, "Cat ET Service Features" for information about service features.
Table 1
Troubleshooting Test Steps Values Results
1. Check the Fuel Level
A. Remove the fuel tank cap from the fuel tank.
B. Check the vent port that is in the cap for debris. Remove any debris with compressed air.
C. Visually inspect the fuel level in the tank. Ensure that the fuel tank has an adequate amount of fuel to operate the engine.
D. Check the position of the fuel supply valve (if equipped). The valve must be in the full open position.
Fuel Level
Result: The fuel level is OK.
Proceed to Test Step 2.
Result: The fuel level is low.
Repair: Fill the tank with fuel. Proceed to Test Step 6.
Table 2
Required Parts Kit
FT-3155 Gauge Kit
Illustration 1 g03780113
(1) Output port of the pump
Illustration 2 g02313813
Assembled required parts
Table 3
Troubleshooting Test Steps Values Results
2. Check the Fuel Pressure at the ARD Fuel Supply
A. Disconnect the ARD fuel line from the pump.
B. Install the FT-3155 Gauge Kit at the pump outlet port.
C. Turn the keyswitch to the ON position. Start the engine.
D. Establish communication between Cat ET and the ECM.
E. Select the "Aftertreatment Fuel Pump Relay Override" in order to activate the pump.
F. Override the pump and record the pressure from the pressure gauge.
G. Deactivate the override.
H. Turn the keyswitch to the OFF position.
I. The pressure must be within specifications. The pump pressure must be 1900 120 kPa (276 17 psi).
1900 120 kPa (276 17 psi)
Result:The pressure measured 1900 120 kPa (276 17 psi).
Proceed to Test Step 6.
Result:The pressure is less than 1900 120 kPa (276 17 psi).
Repair: Replace the primary fuel filter. Proceed to Test Step 3.
Result:The pressure measured 0 kPa (0 psi).
Inspect the wiring at the pump. If the wiring is OK and the pump does not activate, replace the pump cartridge. Refer to Special Instruction, REHS5009.
Illustration 3 g03780122
(2) ARD pump wiring
(3) Diverter valve
(4) Priming Pump
(5) Pressure regulator
Table 4
Troubleshooting Test Steps Values Results
3. Check the Pressure Regulator
A. Turn the keyswitch to the ON position. Start the engine.
B. Establish communication between Cat ET and the ECM.
Select the"Aftertreatment Fuel Pump Relay Override" in order to activate the pump.
C. Record the pressure on the pressure gauge.
D. Turn the keyswitch to the OFF position.
1900 120 kPa (276 17 psi)
Result: The pressure measured 1900 120 kPa (276 17 psi).
Proceed to Test Step 6.
Result: The pressure did not measure 1900 120 kPa (276 17 psi).
Repair: Replace the fuel pressure regulator located on the pump base.
Proceed to Test Step 4.
4. Check the ARD Fuel Pump
A. Turn the keyswitch to the ON position. Start the engine.
B. Establish communication between Cat ET and the ECM.
C. Select the "Aftertreatment Fuel Pump Relay Override" in order to activate the pump.
D. Record the pressure on the pressure gauge.
E. Turn the keyswitch to the OFF position.
1900 120 kPa (276 17 psi)
Result:The pressure measured 1900 120 kPa (275.5 17.4 psi).
Proceed to Test Step 6.
Result:The pressure did not measure 1900 120 kPa (275.5