2004/05/01 Caterpillar


Use The Correct Stub Shaft For The Crankshaft {1237, 1359}

Information for equipment:


BASIC ENGINE
DRIVE GP-FAN

Improved Fan Drives are Used {1359} 2004/11/01
Use The Correct Stub Shaft For The Crankshaft {1237, 1359} 2004/05/01

Fan Drive Bearing - Lubricate 3500 Generator Sets

Fan Drive 3500B Engines for Caterpillar Built Power Modules


Caterpillar Products: All
  • 3500B Engines
  • A stub shaft was manufactured with two different methods in order to cut the keyway. One method used a cutting wheel. The other method used an end mill. The stub shaft that has the keyway that is cut by using an end mill may fail if the stub shaft is used on a 3500B High Displacement Engine.

    Inspect the keyway of the 7N-7057 Stub Shaft during a conversion of a 3500B Engine from a standard stroke to a high displacement. Inspect the keyway of the 7N-7057 Stub Shaft at an overhaul of a 3500B High Displacement Engine.

    Ensure that the keyway of the stub shaft is cut with a cutting wheel if the stub shaft is used on a 3500B High Displacement Engine. Either keyways on the stub shaft may be used on a 3500B Standard Stroke Engine. All new 7N-7057 Stub Shafts will have a keyway that is cut with use of a cutting wheel.




    Illustration 1g01064719

    Keyway that is cut with an end mill




    Illustration 2g01064720

    Keyway that is cut with a cutting wheel

    Caterpillar Information System:

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