Wipe a back of a new top insert and put it to bed the bearing in a rod head. Track that the directing uvula of an insert got to a reciprocal flute in a rod. At all not to a zastukivayta an insert in a bed the hammer. Grease with nothing the bearing at this stage.
Wipe a back of the second insert and lay it in a cover of the lower head of a rod. Again track that the uvula got to a reciprocal groove. Do not apply any lubricant — extremely important that the interfaced surfaces of the bearing and a rod remained absolutely pure and dry.
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Arrange piston rings locks, as shown.
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Have no locks of rings to coaxially piston finger AT ALL, or perpendicular to its axis! |
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Grease the piston and piston rings with pure motive oil.
Put on the piston a tool mandrel for a staving of rings. Leave a skirt of the piston acting from a tool mandrel approximately on 6.4 mm for free gas station it in the cylinder. Rings have to be pressed out aflush with the forming surface of the piston.
Turn a bent shaft so that the neck of the first crank fell into NMT state. Oil motive a mirror of the first cylinder.
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Having developed assembly by a forward tag in the form of deepening or an arrow on the piston bottom on the engine forward, accurately pass a rod throughout the first cylinder of the block. Fill a piston skirt in the cylinder, having densely pressed to the surface of the block bottom edge of a mandrel of the tool for a staving of rings.
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Tap the upper edge of a mandrel for a guarantee of density of pressing it to the block on all perimeter of bottom edge.
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Accurately tapping on the piston bottom with the wooden handle of the hammer, enter the piston in the cylinder, at the same time directing the lower head of a rod to a neck of the corresponding crank of a bent shaft. Piston rings can unexpectedly jump out from under a tool mandrel therefore constantly you watch pressing density to its block. Act without hurrying, at emergence of the slightest resistance immediately stop a piston zastukivaniye. Find out the reason of jamming and eliminate it. Do not make at all attempts to push the piston in the cylinder by force — it can lead to its mechanical damage or destruction of piston rings.
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After introduction of conrod and piston assembly to the engine, before final installation of a cover of the lower head of a rod, it is necessary to check a working gap of the conrod bearing of a bent shaft.
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Cut off a piece of the calibrated plastic wire from the measuring Plastigage set, length width of an insert of the conrod bearing are slightly shorter, and lay it along the first conrod neck of a bent shaft, parallel to an axis of the last.
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Wipe the surface of the bearing in a cover of the lower head of a rod and establish a cover on a rod. Track that the tag on a cover was turned in the same party, as a tag on a rod.
Return bolts of fastening of a cover and in three stages tighten them with the required effort.
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In order to avoid jamming of a key, use a thin-walled face head. At emergence of signs of jamming of a key between a head of a bolt and a rod, slightly raise a head and continue tightening. Do not allow a provorachivaniye of a bent shaft in the course of implementation of all procedure. |
Turn out bolts and carefully uncover a rod. Try not to damage the flattened-out piece of the calibrated wire.
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Determine the size of a working gap in the bearing by width of the flattened-out wire measured on the scale printed on packing to the Plastigage set. Compare result of measurement to requirements
of Specifications.
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Alternatively working gaps in conrod bearings can be determined by a calculation method by carrying out measurements of diameters of conrod necks a shaft and internal diameters of bearings (inserts are laid in a bed, assembly of covers is established, the shaft — is not present).
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A.
B.
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If the size of a gap exceeds the limit of admissible range before looking for inserts of other standard size, check whether got under backs enclosed in beds in a rod and a cover of inserts dirt / oil. Once again measure diameter of a neck of a shaft. The wire flattening since one end more than from another speaks about existence of conicity of a neck.
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