HOSE AS 3P8117 - Caterpillar

The exhaust bypass valve is preset at the factory. However, adjustments may be necessary due to the following circumstances:
Replacement of the exhaust bypass valve
Altitude
Changes in the ambient temperatureUse the following procedure to adjust the exhaust bypass valve for local conditions.
Illustration 1 g00814530
(1) Plug (2) Locknut (3) Adjustment screw
Remove plug (1) and the seal. Loosen locknut (2) .
Turn adjustment screw (3) clockwise for approximately four turns in order to remove the function of the exhaust bypass valve. Be careful not to tighten the screw too far.
Adjust the engine exhaust emissions according to Systems Operation/Testing and Adjusting, "Air/Fuel Ratio Control - Adjust (NOX Feedback)".
Work carefully around an engine that is running. Engine parts that are hot, or parts that are moving, can cause personal injury.
After the desired exhaust emissions are obtained, turn adjusting screw (3) counterclockwise. Turn the screw in order to obtain the desired turbocharger speed according to the applicable Special Instruction:
For the G3508B engine RBK, refer to Special Instruction, REHS5007, "Installation and Initial Start-Up Procedure for G3508B A3 Engines"
For the G3512B engine JHH, refer to Special Instruction, REHS5019, "Installation and Initial Start-Up Procedure for G3512B ULB Engines"
For the G3516B engine JEF, refer to Special Instruction, REHS4724, "Installation and Initial Start-Up Procedure for G3516B Engines"
When the operation is satisfactory, tighten locknut (2) to the torque that is listed in the engine Specifications.
Install the seal and plug (1) .