2.3.9. Removal, check and installation of a belt of a drive of the mechanism of a gazoraspredeleniye

Fig. 2.158. Components of a belt of a drive of the mechanism of a gazoraspredeleniye

Weaken bolts of fastening of a pulley of the pump of cooling liquid.

Weaken a bolt of fastening of the generator.

Fig. 2.159. A pulley of the pump of cooling liquid and a belt of a drive of the generator

Remove a pulley of the pump of cooling liquid and a belt of a drive of the generator (fig. 2.159).

Remove a pulley of a cranked shaft.

Fig. 2.160. Cover of a belt of a drive of GRM

Uncover a belt of a drive of GRM (fig. 2.160).

Remove a roller of a natyazhitel of a belt of a drive of GRM.

Remove a belt of a drive of GRM.

Fig. 2.161. Roller of a natyazhitel of a belt of a drive of GRM

Fig. 2.162. The labels specifying the direction of rotation

NOTE In case of a reuse of a belt of a drive of GRM it is necessary to put with chalk on a return (non-working) surface of a belt to the shooter specifying the direction of rotation (or an arrangement of a pulley of a cranked shaft) that at installation of a belt not to mix the direction of its rotation (fig. 2.162).

Unscrew bolts of fastening of an asterisk of a cranked shaft. Remove an asterisk and directing washer from a cranked shaft.

Remove a natyazhitel of a belt of a drive of GRM.

Check a camshaft asterisk, an asterisk of a cranked shaft, a roller of a natyazhitel of a belt of a drive of GRM and directing roller on lack of excessive wear, cracks and damages.

Replace them if necessary.

Fig. 2.163. Check of smoothness of rotation of a roller of a natyazhitel of a belt of a drive of GRM

Check ease and smoothness of rotation of a roller of a natyazhitel of a belt of a drive of GRM and directing roller and be convinced of absence excessive люфта and extraneous noise at rotation (fig. 2.163).

Replace a roller if necessary.

Replace a roller if traces of an effluence of greasing from its bearing are found.

Check a belt on absence of pollution or oil deposits. Replace a belt if necessary. Small pollution of a belt can be removed with dry rags or obtirochny paper. Do not apply to these purposes solvents.

Fig. 2.164. Defects of a belt of a drive of GRM

At major maintenance of the engine or adjustment of a tension of a belt carefully examine a belt. If it is found any of listed below defects, replace a belt with new (fig. 2.164).

NOTE The normal belt should have accurately pointed lateral faces similar to surfaces cut off by a knife.

Fig. 2.165. Installation of a directing washer and an asterisk of a cranked shaft

Establish directing washer and an asterisk of a cranked shaft, as is shown in drawing (fig. 2.165).

Pay attention to orientation of details at installation.

Moment of an inhaling of a bolt of fastening of an asterisk of a cranked shaft: 170–180 N · m.

Fig. 2.166. Ustanovkazvezdochki of a camshaft

Establish a camshaft asterisk, tighten a bolt of its fastening the nominal moment (fig. 2.166).

Moment of an inhaling of a bolt of fastening of an asterisk of a camshaft: 100–120 N · m.

Establish directing roller and tighten a bolt of its fastening the nominal moment.

The moment of an inhaling of a bolt of fastening of a directing roller: 43–55 N · m.

Combine labels of asterisks of cranked and distributive shaft with adjusting labels when the piston of the cylinder No. 1 is in VMT of a step of compression.

Fig. 2.167. Scheme of installation of a belt of a drive of GRM and asterisk of a cranked shaft

Put on a belt of a drive of GRM an asterisk of a cranked shaft (fig. 2.167).

Fig. 2.168. Tension of a working branch of a belt

Put on a belt of a drive of GRM a camshaft asterisk. After that be convinced that the working branch of a belt is tense. Then make effort in the opposite direction rotations (counter-clockwise) a camshaft asterisk to pull a working branch of a belt, and be convinced that all adjusting labels are combined (fig. 2.168).

Tighten at first an adjusting bolt of a natyazhitel, then a bolt of sharnirny fastening of a natyazhitel.

Moment of an inhaling of a bolt of fastening of a natyazhitel: 43–55 N · m.

Turn a cranked shaft on one turn in the normal direction of rotation (clockwise) and again combine a label of a cranked shaft with an adjusting label (the cylinder No. 1 in VMT of a step of compression).

Fig. 2.169. Check of a tension of a belt of a drive of GRM

Recheck a tension of a belt of a drive of GRM. By easy pressing (with effort about 20 N) of the horizontal direction on a belt in the middle of its working branch be convinced that the top of tooth of a belt deviates on about 4-6 mm (fig. 2.169).

Be convinced that the top of tooth of a belt of a drive of GRM deviates approximately for 1/4 width of a head of an adjusting bolt of a natyazhitel (concerning a side of a head of a bolt).

Establish a cover of a belt of a drive of GRM.

Moment of an inhaling of bolts of fastening of a cover of a belt of a drive of GRM: 8–10 N · m.

Establish a pulley of a cranked shaft. Be convinced that the directing pin of an asterisk of a cranked shaft entered into a small opening of a pulley of a shaft.

Moment of an inhaling of bolts of fastening of a pulley of a cranked shaft: 140–150 N · m.

Establish a pulley of the pump of cooling liquid.

Fig. 2.170. Belt of a drive of the generator

Establish a belt of a drive of the generator and adjust its tension (fig. 2.170).