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Determination of the axial clearance of the crankshaft
| Fig. Crankshaft bearings 440. 1 - bearing shells number 1, 2, 4 and 5. Inserts with lubrication grooves disposed in the cylinder block, the bearing caps are located in the ear without the oil grooves; 2 - cap bolts 65 Nm + 90 Nm; 3 - main bearing caps, cap ?��1 is located from the pulley cover number 3 has a recess for the shims; 4 - the bearing shells number 3. The insert groove for lubricant is located in the cylinder block, a bearing cap liner is without oil grooves; 5 - shims for bearing number 3; 6 - the crankshaft; 7 - shims bearing number 3 disposed in the cylinder block
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Before removing the crankshaft, which can only be dismantled in the engine, measure the axial clearance to know the assembly, whether to change the shims in the middle main bearing (Fig. 440).
| Fig. 441. Measuring the axial clearance of the crankshaft using a probe
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Insert the probe in the middle bearing (number 3) of the crankshaft between the cheek and the inserted shim, as shown in Fig. 441 and check the axial gap, being situated in the range from 0.07 to 0.17 mm. The biggest gap should not exceed 0.37 mm. Note that the axial clearance was chosen entirely for what Abut lever (the best wooden handle any tool to prevent damage) on the cheek of a cranked shaft and use it to press the shaft side. Inserting different thickness probes, set the exact magnitude of the gap. Axial clearance can be measured by the indicator to be attached to the front face of the cylinder, and set the measuring finger on the end of the crankshaft. Then push the crankshaft direction indicator. Set the indicator to zero and push the shaft in the opposite direction. Look at the value of the gap on the display.
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