1994/09/01 Caterpillar


Turbocharger Turbine Nozzle Reusability Information {1052}

Usage:


3600 Family Of Engines

Cracks can occur during normal operation in the turbocharger cast turbine nozzle. See the illustration.

The cracks are not critical:

* If they do not exceed 15 mm (.6 in).
* If they do not lead to break-out of nozzle ring pieces.
* If they run through the webs on the screw holes. [See (19) in the illustration.]
* If they run over the entire width of the outer hoop [See (15) in the illustration.], and they are spaced at least 3 blades apart and do not touch the blades.

Not permissible are:

* Cracks extending beyond 15 mm (.6 in), with the exception of cracks across the outer hoop. [See (15) in the illustration.]
* Cracks extending of the entire width of the inner hoop and flange. [See (17) in the illustration.]
* Parallel cracks with a spacing of less than half crack length.
* Cracks joining together or branching and leading to break-out of nozzle ring pieces. Break-out of nozzle ring pieces can result in damage to the turbine blades.

NOTE: If cracks other than those identified in the illustration are found, contact the Large Engine Center, Lafayette, Indiana, (309) 448-5317 for a determination on further use of the nozzle.


Turbocharger Turbine Nozzle Outer Hoop (A). Blade (B). Inner Hoop (C). Flange (D). Gas Inlet Side (E). Turbine Side (F). The numbers in the illustration identify nozzle cracks.

Caterpillar Information System:

1994/09/01 New Operation And Maintenance Videos Available {0374}
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1994/09/01 New Gasket Used In The Water Lines Group {1380}
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1994/09/01 New Cylinder Liner, Spacer Plate, Spacer Plate Gasket, And Cylinder Head Gasket Used {1216,1221,1124}
1994/09/01 New Gears And Pipe Plugs In Auxiliary Drive Group {1150,1165}
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1994/09/01 New PSG Governor With Pneumatic Air Head Control Available {1264}
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1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems {1105}
1994/09/01 Different Valves And Valve Seats Used In Remanufactured Cylinder Head Groups {1103,1105}
1994/09/01 Longer Studs And Spacers Used To Retain Exhaust Manifolds {1059}
1994/09/01 Use Thread Lock On Bolts That Fasten Aftercooler Housing To Cylinder Block {1063}
1994/09/01 New Rear Camshaft Segments With Stronger Camshaft Flange Used {1210}
1994/09/01 Reworking Diesel And Gas Cylinder Heads On 6.25 Bore V Engines {1101}
1994/09/01 Different Emergency Stop Push Buttons for Electronic Modular Control Panel II (EMCP II) {4490,4450}
1994/10/01 New Rear Crankshaft Seal Groups Available {1161}
1994/10/01 Fuel Priming Pump Can Be Installed On Either Left Or Right Side Service Fuel Filter Groups {1258}
1994/10/01 New Engine Crankshaft Rubber Damper Assembly Uses Improved Rubber Material {1205}
1994/10/01 Adjustment Of Air/Fuel Ratio Control Setting {1278}
1994/10/01 New Governor Control Assembly to Improve Acuator Stability {1289}
1994/10/01 New Spark Plug Tightening Specifications For Engines With Canadian Standards Association (CSA) Ignitions {1550}
1994/10/01 Longer Inch Cylinder Head Bolt Provides Increased Thread Engagement {1100}
1994/10/01 Remanufactured Crankshaft Interchangeability; Remanufactured "Upgrade To New" (UTN) Availability {1202}
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