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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 probably only from the engine taken from the car. It is meant that приводной a disk, газораспределительный a belt, the pallet картера, маслозаборник, the oil pump and shatunno-piston assemblages are already dismantled. Dismantle of assemblage of covers of radical bearings should be made before removal of rods (Removal of shatunno-piston assemblages see). 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 (Replacement of a back epiploon of a cranked shaft see). |
Order release bolts of fastening of assemblage of covers of radical bearings
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- Before to start extraction of a cranked shaft from the engine, measure its size axial люфта. Fix циферблатный a measuring instrument плунжерного type (DTI) on the block to coaxially cranked shaft, having rested it плунжер against a cheek of one of cranks.
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Assemblage 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 a longitudinal direction also is its axial люфт. Compare result of measurement to requirements of Specifications. If люфт exceeds the maximum admissible value, check up on presence of signs of excessive deterioration persistent surfaces of a shaft. In the absence of obvious signs of deterioration replace the persistent (fourth) bearing, installation of new persistent washers usually helps to correct a situation.
- At absence near at hand циферблатного a measuring instrument it is possible to take advantage usual щупом лезвийного type. Accurately shift a shaft against the stop forward on the engine, then define size of the formed backlash between a cheek of a crank and a back wall of the persistent radical bearing, densely having planted in it of a corresponding thickness an edge () щупа.
- Operating in strictly certain order (the Order release bolts of fastening of assemblage of covers of radical bearings see an illustration), in stages (on 1/4 turns for the approach) ослабьте bolts of fastening of assemblage of covers of radical bearings so that there was a possibility of their reversing manually. Remove assemblage, — try not to drop loose leaves of radical bearings.
- Cautiously take a cranked shaft from the engine (take advantage of the help of the assistant). Track, that loose leaves of radical bearings remained in the beds in the block and covers. Establish assemblage of covers on the block, then by hand tighten bolts of its fastening.
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