TRACK G 3P0966 - Caterpillar

Replacement Procedure For Adjustable Exhaust Bypass Valve
The following steps are for replacement of the exhaust bypass valve.
When replacing an adjustable bypass valve, the part will be marked "NON-CURRENT SETTING".1. Loosen jam nut (2).2. Find the prescribed valve displacement from the charts in 3406 SITA Adjustable Bypass Valve Settings by locating engine model, speed (rpm), and separate circuit aftercooler water temperature (SCAC), and the BkW (BHP) output for the engine.3. Place the bypass valve in the bench fixture and apply 100 kPa (14.5 psi) air pressure to air inlet ("boost inlet") port (1).4. Turn bypass valve adjustment screw (3) until the bypass valve movement meets the prescribed valve displacement from the zero gauge pressure position. Turn the screw counterclockwise (CCW) to increase displacement. Turn the screw clockwise (CW) to decrease displacement.5. Tighten jam nut (2) after the setting is complete.
Exhaust bypass valve.Adjustment Procedure For Adjustable Exhaust Bypass Valve
The following steps are for the adjustment of the exhaust bypass valve to compensate for altitude and/or ambient air temperature.
1. Loosen jam nut (2).2. Place the bypass valve in the bench fixture and apply 100 kPa (14.5 psi) air pressure to air inlet ("boost inlet") port (1).3. Find the prescribed valve displacement from the charts in 3406 SITA Adjustable Bypass Valve Settings by locating engine model, speed (rpm), and separate circuit aftercooler water temperature (SCAC), and the BkW (BHP) output for the engine.4. Decrease the prescribed value displacement by the amount referenced in the Altitude And Temperature Table For Adjustable Bypass Valves.5. Turn bypass valve adjustment screw (3) until the bypass valve movement meets the the valve found in Step 4. Turn the screw counterclockwise (CCW) to increase displacement. Turn the screw clockwise (CW) to decrease displacement.6. Tighten jam nut (2) after the setting is complete.Adjustable Bypass Valve Settings
Low Speed
7W7194 - Engine Arrangement7C9038 - Turbocharger Group7C9043 - Exhaust Bypass Group7C6942 - Bypass SpringFuel - Pipeline Natural Gas High Speed
7W7194 - Engine Arrangement9Y9810 - Turbocharger Group7C9043 - Exhaust Bypass Group7C6942 - Bypass SpringFuel - Pipeline Natural Gas Altitude And Ambient Air Temperature Table For Adjustable Exhaust Bypass Valves