SCREW-ADJUSTMENT 7W7231 - Caterpillar

Engine: Commercial with Mechanical Unit Injection
3126 Engine: Commercial with Mechanical Unit Injection
3114
3116 Industrial Engine: with Turbochargers
All Industrial Engine:
3114
3116
3126
3126B
3176
3204
3208
3304 Diesel
3406 Diesel
3406C
3408
3408 Diesel
3412
C-10
C-12
C-15
C-16
C-9 Marine Engine:
3116
3126
3126B
3208
3304
3306
3406
3408
3412
C-12
C-9Required Tooling
Use the 215-2592 Wastegate tool kit .Procedure for Troubleshooting the Wastegate Canister
Note: This procedure can be completed while the turbocharger is installed on the engine or while the turbocharger is not installed on the engine.
Remove the silicone hose that is connected to the wastegate canister and install the test kit. Refer to Illustration 1.
Illustration 1 g01717703
(1) Wastegate actuator (2) Test hose
Use the regulator to increase and decrease the air pressure. Do not exceed 138 kPa (20 psi). As the air pressure to the canister increases, the actuator rod will move. The movement of the rod causes the opening of the wastegate and the closing of the wastegate. While the actuator rod is moving, inspect the rod for damage or for bending.
If the actuator rod does not move, then the wastegate canister is faulty and the turbocharger needs to be replaced.
If the actuator rod moves, then the canister is operational.
Disconnect the test kit and install the silicone hose to the wastegate canister.