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2024年5月17日星期五

Caterpillar 311F LRR - JFT Crawler Excavator Engine Camshaft Removal and Installation

This article introducesCaterpillar 311F LRR - JFT Crawler Excavator Engine Camshaft Removal and Installation


Camshaft – removal and mounting
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Removing steps

begin:

A. Remove the camshaft gear. See Disassembly and assembly, "Camshaft gear-removal and install" for the correct procedure.


pay attention to

Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten component life.


1. The engine shall be mounted inverted on a suitable bench.





2. Remove the bolts (3) from the thrust plate (1).

3. Make temporary marks to determine the orientation of the thrust sheet (1). Slide the camshaft towards the front of the engine to remove the thrust plate. Remove the stopper.


pay attention to

Do not damage the cam or the bearings when removing or installing the camshaft.


4. Carefully remove the camshaft (3) from the cylinder block.

Installation steps


pay attention to

Keep all the parts clean without impurities.

Impurities can cause rapid wear and shorten component life.

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1. Clean the camshaft (2) and the thrust plate (1). Check the camshaft and thrust plates for wear and damage. For more information, see the technical specification, "Camshaft". If necessary, replace all worn or damaged parts.

2. Clean the camshaft bearings in the cylinder block. Check the camshaft bearings for wear and damage. For more information, see the Technical Parameters, "Camshaft Bearing". Replace the camshaft bearings, if necessary. Refer to Disassembly and assembly, "Camshaft bearing-Removing and installing."


pay attention to


Replace all the tappets when installing the new camshaft



3 Check the ttt for wear and damage. For more information, please see the technical parameters, "Tappet assembly". If necessary, replace all worn or damaged straight poles. See Disassembly and assembly, "Tappet Assembly-Removing and Installation" for the correct steps.


4. Lubricate the cams and bearing surfaces of the camshaft with clean engine oil.



pay attention to



Do not damage the cam or the bearings when removing or installing the camshaft.



5. Carefully install the camshaft (3) into the cylinder block. Keep the camshaft slightly protruding for thrust plate installation.





6. Lubricate the thrust plate with a clean engine oil (1). Position the thrust sheet on the camshaft and position the chamfer on the position (X) toward the block. Slide the camshaft into the cylinder block.



7. Install the bolts (3) on the thrust plate (1). Tighten the bolts to a torque of 25N-m (2211b in).

End By: Install the camshaft gear. See Disassembly and assembly, "Camshaft gear-Removing and installing" for the correct procedure.
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