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Caterpillar 3126B - page 22 / 26





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  • 6.

    Drain engine oil, transmission fluid, hydraulic fluids and dispose according to local ordinances.

  • 7.

    If a new or rebuilt engine is installed, or coolant is contaminated, remove the radiator and send it out for cleaning and flow testing.

  • 8.

    Important: Install identification tags on each electrical circuit, harness connector, air lines, and hoses as they are removed. This will save much time and confusion later as the replacement engine is installed. The electronically controlled engines have several harnesses and hoses that are a part of the engine package, and can be removed with the engine assembly. Removing them and replacing them with the engine in place can be very time consuming. Study these items before beginning the engine removal process.

The following suggestions are intended to remove the engine and transmission as a package, along with some of the hoses and harnesses. The limited space between the engine and frame rail on the right side makes access difficult to some of the connections.

Some may elect to remove the transmission first, this is a local decision.

Engine Removal

  • 1.

    Observe the 8 steps listed above.

  • 2.

    Remove the engine compartment rear door, if a fork lift is to be used to remove the engine package.

  • 3.

    Remove body rear bumper.

  • 4.

    Remove chassis rear bumper and upper support bar.

  • 5.

    Remove air conditioner drive belt, if so equipped.

  • 6.

    Remove air cleaner hoses and piping.

  • 7.

    Remove charge air-to-turbocharger pipe, remove support bracket at rear lift eye with the pipe.

  • 8.

    Remove radiator upper and lower pipes and hoses. Tag the sensor connector on the upper pipe.

  • 9.

    Remove the radiator module assembly for two reasons: (See Cooling section.)

    • a.

      to facilitate access to the right side of the engine.

    • b.

      to send the radiator out for cleaning and testing if the

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