4.5.3. Check and adjustment of a tension of a belt of the drive of the fuel pump of high pressure (FPHP)

1. Remove the fan with its coupling.
2. Turn out three bolts of fastening of the coupling of the fan to its nave and remove the coupling.
3. Remove TNVD drive belt casings.

Fig. 4.10. An arrangement of tags and adjusting openings for replacement of a belt of the TNVD drive: 1 – an opening on TNVD pulley under the aligning pin; 2 – an opening in a forward cover of camshafts; 3 – an opening in a forward basic neck of the inlet camshaft; 4 – an opening in the block under an adjusting pin; 5 – the index of VMT on a chain cover; 6 – adjusting tag of a rotor of the sensor of provision of a bent shaft; 7 – a pulley with a damper of a bent shaft; 8 – a yoke with soothing rollers; 9 – gear belt of the TNVD drive; 10 – an arm with a tension roller; 11 – nut of fastening of a tension roller; 12 – TNVD drive belt tension spring; 13 – TNVD pulley; 14 – bolts of fastening of TNVD to a forward support; and – a belt branch between TNVD and a pulley of a bent shaft

4. Weaken an inhaling of a nut 11 (see fig. 4.10) fastenings of a tension roller of the TNVD drive (the belt at the same time will stretch from effort of a tension spring 12) and tighten a nut 11.
5. Turn a bent shaft of the engine not less than on one turn.
6. Install the piston of the 1st cylinder in the top dead point of a step of compression (see subitem 3-5 "Replacement of a belt of the drive of the fuel pump of high pressure (FPHP)").

Fig. 4.9. Adjusting openings on the case and a pulley of TNVD: 1 – TNVD case; 2 – TNVD pulley; 3 – adjusting pin; 4 – TNVD nave groove

7. Check an adjusting pin coincidence of a groove of a nave of 4 TNVD (fig. 4.9) and its pulley to an opening on a pump housing, having established a pin in an adjusting opening. At the same time the adjusting pin has to enter an opening freely.
8. At discrepancy of a groove of a nave and opening on a pulley with an opening on the TNVD case execute operations of subitem 3-20, see. "Replacement of a belt of the drive of the fuel pump of high pressure (FPHP)".
9. After adjustment of a belt of the TNVD drive take an adjusting pin and establish all earlier removed details as it should be, the return to removal.