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4-20-snyatie-kolenchatogo-vala.html
4.20. Removal of a cranked shaft
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Removal of a cranked shaft possibly only from the engine taken from the car. It is meant that the driving disk, a gas-distributing belt, the case pallet, a maslozabornik, the oil pump and shatunno-piston assemblies are already dismantled. Dismantle of assembly of covers of radical bearings should be made before removal of rods (see. Removal of shatunno-piston assemblies). Before removal of a cranked shaft it is necessary also отболтить and to separate from the block of cylinders the holder of a back epiploon (see. Replacement of a back epiploon of a cranked shaft). |
Order of an otpuskaniye of bolts of fastening of assembly of covers of radical bearings
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- Before starting extraction of a cranked shaft from the engine, measure its size axial люфта. Fix a tsiferblatny measuring instrument of plunzherny type (DTI) on the block to coaxially cranked shaft, having rested it a plunzher against a cheek of one of cranks.
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Assembly of covers of radical bearings should remain on the place, and its fixture will tighten with demanded effort. |
- Push a cranked shaft against the stop back and null the device indicator. Now push a shaft in an opposite direction and consider the measuring instrument indication. The size of a free wheeling of a shaft in the longitudinal direction also is its axial люфт. Compare result of measurement to requirements of Specifications. If люфт exceeds the maximum admissible value, check on existence of signs of excessive wear persistent surfaces of a shaft. In the absence of obvious signs of wear replace the persistent (fourth) bearing, installation of new persistent washers usually helps to correct a situation.
- In the absence of near at hand tsiferblatny measuring instrument it is possible to use usual shchupy lezviyny type. Accurately shift a shaft against the stop forward on the engine, then define size of the formed gap between a cheek of a crank and a back wall of the persistent radical bearing, having densely planted in it the corresponding thickness an edge (I) щупа.
- Operating in strictly certain order (see an illustration the Order of an otpuskaniye of bolts of fastening of assembly of covers of radical bearings), in stages (on 1/4 turns for an approach) weaken bolts of fastening of assembly of covers of radical bearings so that there was a possibility of their reversing manually. Remove assembly — try not to drop loose leaves of radical bearings.
- Carefully take a cranked shaft from the engine (use the help of the assistant). Track, that loose leaves of radical bearings remained in the beds in the block and covers. Establish assembly of covers on the block, then by hand tighten bolts of its fastening.
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