KIT-ACTUATOR 4E5986 - Caterpillar

G3508 (2JF330-Up, 9TG91-Up) Industrial EnginesSUPPLEMENT: 04/01/97Engine News, August 1996, Page 5-7, "New Compressor Bypass Conversion Arrangement Eliminates Turbocharger Surge"More information needs to be added to this article. Add the following information below the "Note:" after Illustration 1.
1. Install the 133-4817 or 133-7396 Compressor Bypass Conversion Arrangements as in Illustration 1. Leave the newly installed 8C-1358 Ball Valve in the fully closed position.2. Reference the Special Instruction, SEHS9769, "Installation And Initial Start-Up Procedures For G3500 Engines" and adjust the engine. Obtain the proper 02 (emissions) level and throttle angle while the engine is operating at rated load.3. Careful implementation of Step 2 will usually eliminate the turbo surge under steady state conditions but, depending on the load swing, the 8C-1358 Ball Valve may need to be opened slowly until any audible sign of trubo surge is eliminated.--------------- END SUPPLEMENT ---------------SUPPLEMENT: 12/01/96Engine News, August 1996, Page 5, "New Compressor Bypass Conversion Arrangement Eliminates Turbocharger Surge"Disregard the second paragraph of the Adaptable To section. The correct information follows:
Illustration 1 shows the right side view of the new 133-4817 Compressor Bypass Conversion Arrangement. This arrangement is used with low emissions generator set applications (with an idle-bleed circuit).
Disregard the first paragraph after illustration 2. The correct information follows:
Illustration 2 shows the right side view of the new 133-7396 Compressor Bypass Conversion Arrangement. This arrangement is used with low emissions industrial engine applications (without an idle-bleed circuit).
Disregard the first paragraph after illustration 3. The correct information follows:
Illustration 3 shows the top view of the new 133-4817 Compressor Bypass Conversion Arrangement.
--------------- END SUPPLEMENT ---------------Description of Change: A new compressor bypass conversion arrangement has been designed to eliminate turbocharger surge in the above engines. If the engine experiences surge during abrupt load changes or when it is put into lug, the ball valve can be adjusted to eliminate it. This adjustment should be made at the engine load point for which the engine is expected to operate.
Adaptable To: This change is adaptable to G3508 Industrial Engines effective with (2JF330-Up), and G3508 Industrial Engines effective with (9TG91-Up) serial numbers. Right side view of the new 133-4817 Compressor Bypass Conversion Arrangement. This view displays the generator set design with the idle-bleed circuit.
Illustration 1. Engines with the idle-bleed circuits will use the 2P-1297 Tee-O-ring Port. This will connect the new 133-4817 Compressor Bypass Arrangement with the existing idle-bleed circuit and a port in the aftercooler.
Illustration 2.The industrial engine for the 133-4817 Compressor Bypass Conversion Arrangement. This view is displayed without the idle-bleed circuit and is connected with the 030-7950 Elbow.
Illustration 3.Top view of the 133-4817 Compressor Bypass Conversion Arrangement.
Illustration 4. (16) 133-7379 Air Cleaner Housing Assembly. (17) Views of the 7J-5225 Boss Fitting.The 133-7379 Air Cleaner Housing Assembly includes the 7J-5225 Boss Fitting. This boss fitting comes with the air cleaner housing assembly, or can be added to an existing housing assembly.