3.1.2.1.3. A privodnoj belt of a camshaft

THE GENERAL DATA

System timing

1 – a cranked shaft, 2 – a drive pulley timing, 3 – a gear belt, 4 – the pump of a cooling liquid, 5 – a tension roller, 6 – эксцентриковый the screw, 7 – a spring of a tension roller, 8 – a pulley of a camshaft, 9 – a camshaft, 10 – bracket fastenings,

11 – a pusher, 12 – an adjusting plate, 13 – a spring, 14 – a plate, 15 – crackers, 16 – маслоотражательный a cap, 17 – the final valve, 18 – a drive casing timing, 19 – the inlet valve

The gear belt puts in action a camshaft and the pump of system of cooling. At belt breakage there can be an impact of pistons about the valve and serious damage of the engine. Therefore to make belt replacement it is necessary in the ordered terms or in earlier terms if on a belt oil or a belt has got has non-uniform deterioration.

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The prevention

Precisely to establish a tension of a gear belt on models since 1992 it is possible only with use of the special electronic tool. If the belt tension is made roughly, it is necessary to check up a tension with use of the special electronic tool at the first opportunity.

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Not to use the car on the big distances or to maintain the engine on high frequencies of rotation while the belt tension is not correct.

Removal driving a camshaft belt is necessary for performance of following operations:

 – Removal and installation of a head of the block of cylinders or a camshaft;
 – Removal and installation of the pump of a cooling liquid;
 – Removal and installation driving chains of the oil pump;
 – Removal and installation of a sealing ring of a cranked shaft;
 – Adjustment of a backlash of valves.

Cam and tip of the clown of a tension roller driving a camshaft belt


Arrangement of a gear belt – models 1998 of sm³ with 16 valves

1 – the forward mechanism of a tension, 2 – a back pulley of the mechanism of a tension, 3 – position of apertures for fixing of pulleys of camshafts, 4 – an aperture for fixing of a pulley of a cranked shaft, 5 – area of measurement of a tension of a belt (to use special tool Peugeot)

Blocking of pulleys of camshafts in the engine of 1998 sm³ with 16 valves

Pulleys of camshafts are specified by arrows.

Removal

PERFORMANCE ORDER

Models 1580 of sm3 and 1905 sm3 with 8 valves till 1992 with the semi-automatic tension device of a belt 1. To remove a wire of weight from the accumulator. 2. To weaken and remove driving a generator belt. 3. To remove the top casing driving a camshaft belt. 4. To remove a lateral casing. 5. By means of a pulley bolt to turn a cranked shaft so that drive elements timing were established in the position, allowing to fix their cores. For fixing of these elements it is necessary to use two special steel cores in diameter of 10 mm and length 70 mm (the adaptation 00163). 6. To insert one core through a camshaft pulley, and the second through a pulley of a cranked shaft (on a thickening the aperture in diameter of 10 mm is located). 7. To take cores. 8. To remove the bottom plate closing картер couplings, and to fix a flywheel (for example, adaptation Facom D 86). 9. To remove a pulley of a cranked shaft. 10. To take adaptation Facom D 86. 11. To remove plastic casings driving a camshaft belt, at first bottom left, and then the top and bottom right. 12. To weaken nuts of the holder of a tension roller and a counternut of management of the clown. 13. By means of a square clip with the party of 6 mm for management of the clown to compress a spring together with the holder of a tension roller. 14. To tighten a counternut. The belt is weakened. 15. To remove a belt, trying not to bend it. If the gear belt is repeatedly used, it is necessary to note a direction of its rotation. Models 1580 of sm3 and 1905 sm3 with 8 valves since 1992 and manual adjustment of a tension of a belt, and also all models 1761 of sm3 and 1998 sm3 with 8 valves (difference) 16. For fixing of pulleys of a drive of the mechanism timing it is necessary to use a core in diameter of 10 mm on the one hand and 8 mm with another. 17. To weaken a bolt, securing the a pulley of the mechanism of a tension of a gear belt, and to turn a pulley clockwise, using the key of square section corresponding to an aperture in a nave of a pulley. Reliably repeatedly to tighten a bolt of fastening of a pulley. Models 1905 of sm3 with 16 valves (difference) 18. To weaken the mechanism of a tension of a forward part of a gear belt and bolts of a back pulley of the mechanism of a tension. To turn a forward pulley in a direction clockwise, using the key of square section corresponding to an aperture in a nave of a pulley, and reliably repeatedly to tighten a bolt of fastening of a pulley. Similarly to turn a back pulley in a direction counter-clockwise and reliably repeatedly to tighten a bolt of fastening of a pulley. 19. To check up position of pulleys of a camshaft, cores of blocking of a cranked shaft, to remove and examine a gear belt. 20. To weaken a bolt of fixing of the back mechanism of a tension of a pulley of a gear belt, to turn a pulley in a direction clockwise and repeatedly to tighten a bolt of fastening of a pulley. Models 1998 of sm3 with 16 valves (difference) 21. To weaken bolts of fastening of two forward assemblages of the mechanism of a tension. 22. To weaken nuts of the holder of a tension roller and a counternut of management of the clown. 23. To move a pulley of the mechanism of a tension on the maximum distance from a belt, using a key of square section, and to remove a gear belt (fig. the Arrangement of a gear belt – models 1998 of sm3 with 16 valves see).

Installation driving a camshaft belt

And, In – fixing of gear wheels before their removal, With, D – signs on a gear belt and on pulleys

Sequence of installation of a gear belt of a drive (engines of 1905 sm³ with 16 valves)

1, 2, 3, 4, 5, 6 – sequence of installation of a gear belt of a drive

Installation

PERFORMANCE ORDER

Models 1580 of sm3 and 1905 sm3 with 8 valves till 1992 with the semi-automatic tension device of a belt 1. Before belt installation on a former place completely to clear pulleys of a drive of a gear belt. To check up smoothness of rotation of a pulley of the mechanism of a tension. 2. Correctly to establish a camshaft, inserting into a corresponding place through a camshaft pulley a special core. 3. To put a belt to a place of its installation, in view of the arrows specifying a direction of its movement. To put on a belt a pulley of a cranked shaft. 4. To clear a head part of a cranked shaft, a pulley and its bolt. 5. To establish on the end of a cranked shaft a pulley without a tightening of elements of fastening. 6. Inserting through a pulley a core, to check up position of a cranked shaft. 7. To place a belt at first on a camshaft pulley, then on a tension roller and, at last, on a pulley of the pump of a cooling liquid. 8. To weaken a counternut of management of the clown and by means of the square holder with the party of 6 mm to move the clown to conclusion position (the tension roller will automatically cause a tension). 9. To be convinced that the cam of the clown is in conclusion position (will turn downwards) and does not pass at the top a disk of the pump of a cooling liquid. 10. To take both cores. 11. To tighten nuts of the holder of a tension roller and a counternut of the clown. 12. By means of a pulley bolt to turn a cranked shaft of the engine on two turns so that to establish the piston of the cylinder 1 in ВМТ (a sign on a flywheel should be opposite to a sign on "0" plastics of adjustment of ignition). Elements timing will be in the position presented on fig. Installation driving of a belt of a camshaft. 13. To weaken and tighten nuts (1) and a counternut. 14. To turn a cranked shaft of the engine before position of fixing by cores of elements of a drive timing. By means of two cores to check up installation timing. If cores are not inserted, it is necessary to repeat all operations. The prevention Also installation timing by means of signs (hyphens) on a belt is possible. Position of these signs should correspond to signs on pulleys. 15. To connect a weight wire to the accumulator. Models 1580 of sm3 and 1905 sm3 with 8 valves с1992 year and manual adjustment of a tension of a belt, and also all models 1761 of sm3 and 1998 sm3 with 8 valves (difference) 16. To establish a gear belt of a drive as it is described above. 17. To weaken a bolt of fastening of a pulley of the mechanism of a tension. 18. To establish for measurement of a tension of a belt the special measuring equipment on a forward branch of a belt. 19. To adjust, that the initial tension of a belt was 16 ± 2 units in model 1998 of sm3 with 8 valves and 30 ± 2 units – on all other models. 20. To turn some times a cranked shaft and repeatedly to measure a tension of a forward branch of a belt which should make 44 ± 2 units. 21. In the absence of a measuring instrument of a tension of a belt to pull a belt so that it was possible big and index fingers to turn a forward branch of a belt on 90 °. After adjustment of a tension of a belt to tighten all bolts. Models 1905 of sm3 with 16 valves (difference) 22. To weaken bolts of the mechanism of a tension so that them it was possible to turn easily (fig. Sequence of installation of a gear belt of a drive (engines of 1905 sm3 with 16 valves see)). The prevention On a belt there can be adjusting labels in the form of yellow lines to guarantee correctness of installation on both pulleys of a camshaft and a pulley of a cranked shaft. Two adjusting labels with a unique line should join a label on each pulley of a camshaft. The adjusting label with a double line should join a label of a cranked shaft (against a groove segment шпонки). 23. To move forward and back pulleys of the mechanism of a tension to a gear belt before full contact to it, then to tighten bolts. 24. To move a forward pulley of the mechanism of a tension in a direction counter-clockwise to a full choice of a backlash and in this position to tighten bolts. Similarly to establish a back pulley of the mechanism of a tension. 25. In the presence of the measuring equipment to pull a forward branch of a belt to 19 units. 26. To weaken a bolt of fastening of a back pulley of the mechanism of a tension and to turn a pulley clockwise to a tension of a forward branch of the belt equal to 21 units. 27. In the absence of a measuring instrument of a tension of a belt to pull a belt so that it was possible big and index fingers to turn on 45 ° a forward branch of a belt between a pulley of a camshaft and a pulley of the mechanism of a tension. After adjustment of a tension of a belt to tighten all bolts. 28. To turn some times a cranked shaft and repeatedly to measure a tension of a forward branch of a belt between a pulley of a camshaft and a pulley of the mechanism of a tension which should make 45 ± 5 units. Models 1998 of sm3 with 16 valves (difference) 29. To move a pulley of the mechanism of a tension so that a forward branch of a belt has stretched to 45 units, and then to establish a tension of a belt 22 ± 2 units. 30. To weaken a bolt of fastening of a back pulley of the mechanism of a tension and to turn a pulley counter-clockwise to a tension of a forward branch of the belt equal 32 ± to 2 units. 31. In the absence of a measuring instrument of a tension of a belt to pull a belt so that it was possible big and index fingers to turn on 45 ° a forward branch of a belt between a pulley of a camshaft and a pulley of the mechanism of a tension. After adjustment of a tension of a belt to tighten all bolts. 32. To turn some times a cranked shaft and repeatedly to measure a tension of a forward branch of a belt between a pulley of a camshaft and a pulley of the mechanism of a tension which should make 53 ± 2 units.