5.6.8. Replacement of a belt of a drive of TNVD

Fig. 3.38. Adjusting labels on a pulley of a cranked shaft: 1 — a label of installation of the piston of the 1st cylinder in VMT for a belt of a drive of the mechanism of a gazoraspredeleniye and a belt of a drive of TNVD; 2 — a label of yellow color of installation of an initial corner of an advancing of injection of TNVD fuel

Disconnect a wire from the "minus" plug of the storage battery. Turn a cranked shaft and combine cut 1 (fig. 3.38) of a pulley with a label on the block of cylinders (the piston in the 1st cylinder is in VMT of a step of compression). Remove an air line connecting the case of the air filter and the inlet pipeline. On the CD20E engine disconnect a vacuum hose and an oil pipeline suitable to the vacuum pump, and remove the vacuum pump, accepting precautionary measures for the prevention of pro-lithium of oil. Remove details of fastening of a branch pipe of cooling liquid under the TNVD case and take aside a branch pipe.

Fig. 3.39. Weakening of a tension roller of a belt of a drive of TNVD

Uncover the TNVD driving belt, laying and, having weakened a nut of a tension roller, wring out it, turning clockwise (fig. 3.39). Wrap a nut of a roller and remove a belt.

It is recommended to replace a tension roller at replacement of a driving belt. The roller should rotate on an axis without jammings.

Fig. 3.40. Installation of a belt of a drive of TNVD on the CD20 engine

Fig. 3.41. Installation of a belt of a drive of TNVD on the CD20E engine

At installation of a driving belt consider the direction of its rotation specified on a belt by shooters. Be convinced that pulley cut (without color marking) a cranked shaft is opposite to a label on the block of cylinders; the label on a gear pulley of a camshaft (from a flywheel) is in situation «1 hour» for the CD20 engine (fig. 3.40) or «12 hours» for the CD20E engine (fig. 3.41); the label on gear to a pulley of TNVD is in situation «1 hour».

Fig. 3.34. Installation of a gear pulley of a drive of TNVD: 1 — an adjusting label; 2 — shponochny grooves: "And" for the CD20 and "B" engine for the CD20E engine

If TNVD or its pulley acted in film, consider that on CD20 and CD20E engines different shponochny grooves (see fig. 3.34) are used. Examine gear pulleys, a roller and be convinced of absence of damages on their surface.

Establish a belt on pulleys, having a label on a belt opposite to labels on camshaft and TNVD pulleys, thus the arrow direction on a belt should be turned towards the engine.

Adjust a tension of a branch of a driving belt between gear pulleys. The effort enclosed to a dynamometer at check of a tension of a belt, makes for the engine of CD20 10 — 20 kgfs, for the CD20E engine — 5 — 15 kgfs.

On the CD20E engine establish into place the vacuum pump. Unscrew a nut of a tension roller and release its spring. Turn on two turns a cranked shaft clockwise and return to a point of adjustment of an initial corner of an advancing of injection of fuel for check of correctness of TNVD installation. Do not turn a cranked shaft of the engine, using for this purpose a camshaft pulley. Execute the remained operations as it should be, the return to removal.