this article mainly introduces Caterpillar 311F LRR- JFT Crawler Excavator Engine Crankshaft main bearing – removal
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Removing steps
(1) The tool is used in the hole of the electric starting motor.
begin:
A . Remove the engine oil sump and the oil suction pipe. For the correct steps, see Disassembly and Assembly, "Engine Oil pan-Removing and Installation".
B . Balancer, remove, if necessary. For the correct steps, see Disassembly and Assembly, "Balancer-Remove".
pay attention to
This procedure must only be used for the removal and installation of the main bearing bearing bush while the crankshaft is in place.
Disassembly of each pair of main bearing tiles must be completed before removing the next pair of main bearing tiles
Steps and installation steps.
pay attention to
Keep all the parts clean without impurities.
Impurities can cause rapid wear and shorten component life.
1. Make sure that the correct position and orientation of the main bearing cover are indicated.
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2. Remove the bolts (1) and remove the main bearing cover (2) from the cylinder block.
3. Remove the main bearing lower bearing bush (3) from the main bearing cap (2). Keep the main bearing bearing bush integrated with the main bearing cover.
Note: The lower bush of the main bearing is a common bush without oil holes.
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4. Use the appropriate tool to push the main bearing from opposite the convex tongue (5). Use tool (A) to rotate the crankshaft while push the bearing bush. Remove the main bearing upper bearing bush (5) from the cylinder block. Keep the shaft tiles integrated. The
thrust washer (4) is attached to the upper shaft tile of the no. 3 main bearing to record the orientation of the thrust washer for easy installation.
