LUBRICATION GP-AUTOMATIC 4992424 - Caterpillar

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Test equipment (typical example)
(3) Wastegate pressure line
(7) Pressure line for regulated air pressure
(8) Test pressure gauge
(9) Air pressure regulator
Install the test apparatus to the engine:
Disconnect wastegate pressure line (3) from the intake manifold.
Install a fitting that will allow a leak free seal between the wastegate pressure line and pressure line for regulated air pressure (7). Note: Ensure that the air supply is regulated to 170 kPa (25 psi) prior to connecting the air supply to the pressure line. Damage to the wastegate could result if the air supply is not regulated.
Install the test apparatus to the wastegate pressure line.
Slowly begin to apply pressure to the test apparatus.
Monitor the pressure on test pressure gauge (8) as you increase the pressure by using air pressure regulator (9).
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Turbocharger (typical example)
(4) Wastegate actuator
(5) Control rod assembly
Do not allow the test pressure to exceed 170 kPa (25 psi). Damage to the wastegate actuator may result.
As the pressure on the test apparatus increases, monitor control rod assembly (5) that is part of wastegate actuator (4) for movement. Refer to Systems Operation/Testing and Adjusting, "Turbocharger - Inspect" for specifications on the test pressure and the amount of rod travel for your application.
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Drain orifice and drain line
(6) Drain orifice
While the correct test pressure is applied to the wastegate actuator, check the vent line for drain orifice (6) for air discharge. Expected Result:The correct rod travel is observed at the designated test pressure and a constant flow of air is discharged from the vent line for the drain orifice.Results:
OK - The correct rod travel is observed at the designated test pressure and a constant flow of air is discharged from the vent line for the drain orifice. The wastegate actuator and the wastegate valve at the turbocharger appear to be operating correctly. Proceed to Test Step 9.
Not OK - Drain Orifice - A constant flow of air is not discharged from the vent line for the drain orifice.Repair: The drain orifice is plugged, or an air line from the intake manifold to the vent line is blocked. Remove the air lines and the drain orifice from the engine. Clean the air lines and the drain orifice. Replace parts, if necessary.STOP
Not OK - Air Line - The correct rod travel is not observed at the designated test pressure.Repair: There may be an obstruction in the air line. Remove the air line and clean the air line.If the problem persists, remove the wastegate actuator from the engine. Bench test the actuator. Operate the wastegate valve at the turbocharger by hand. The lever for the wastegate valve must move freely, without binding. Repair any problems that have been found with the actuator and the wastegate valve at the turbocharger. Replace parts, if necessary.Verify that the repair resolves the original problem.STOPTest Step 9. Check the Wastegate Control Valve
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Wastegate control valve
(10) O-ring seals
(11) Outlet pressure ports
Ensure that the keyswitch is in the OFF position. Disconnect the connector at the wastegate control solenoid.
Remove the wastegate control valve from the