Adjusting the tension of the drive belts of the generator and the water pump of the YaMZ-236M2, YaMZ-238M2 engines

You will need tools and fixtures: a key 13 and 17, a mounting blade and a device for checking the tension of the drive belts, a spanner wrench for 17

Protect the belts from oil and fuel, check their tension and, if necessary, adjust it.

Especially carefully check the belt tension in the first 50 hours of engine operation, since at this time they are most stretched.

The tension of the belts must always be normal, as excessive and insufficient tension leads to premature failure.

Как заменить и натянуть ремни привода генератора и водяного насоса автомобиля КамазКак заменить и натянуть ремни привода генератора и водяного насоса автомобиля Камаз

Normally tensioned belts, when pressed on the middle of the branch with a force of 40 N (4 kgf), should bend: the water pump belt - by 7-12 mm (Fig. 1),

compressor belt - 4-6 mm on a short branch (Fig. 2),

Как заменить и натянуть ремни привода генератора и водяного насоса автомобиля Камаз

generator drive belts - by 10-15 mm (Fig. 3).

If the belts bend more or less than specified, adjust their tension. It is recommended to check the belt tension using a device of the KI-8920 type.

Adjust the water pump belt tension with shims.

Как заменить и натянуть ремни привода генератора и водяного насоса автомобиля Камаз

To tension the belt, unscrew the nuts securing the pulley sidewall and remove one or two shims (Fig. 4). Put the gaskets on the outer side of the sidewall and sequentially, in several steps, tighten the nuts, turning the pulley after tightening each nut.

Then check that the belt tension is correct.

When replacing an old belt with a new one, place all spacers between the hub and the removable pulley sidewall and adjust the belt tension as indicated above.

Adjust the tension of the compressor belt with a tensioner.

Как заменить и натянуть ремни привода генератора и водяного насоса автомобиля КамазКак заменить и натянуть ремни привода генератора и водяного насоса автомобиля Камаз

Before adjusting, unscrew the lock nut by one turn, the nut securing the tensioner pulley axle (Fig. 5) by half a turn,

tensioner bolt nut (Fig. 6) two turns.

Как заменить и натянуть ремни привода генератора и водяного насоса автомобиля Камаз

Turning the tensioner bolt (Fig. 7), adjust the belt tension.

After adjustment, tighten the axle nut and locknut to a torque of 120-150 Nm (12-15 kgf-m) and the tensioner bolt nut to a torque of 10-20 Nm (1-2 kgf-m).

With a larger tightening torque, the adjustment will be violated due to the movement of the pulley axis.

Adjust the tension of the generator belts by moving the generator relative to the axis of its attachment.

Before adjusting, loosen the alternator mounting bolts, the alternator bar mounting nut and the alternator mounting bolt to the bar.

After adjustment, securely fasten the generator.

With increased exhaust or breakage of at least one of the alternator drive belts, replace both belts as a set to ensure an even load on them.

Adjustment and tension of drive belts for generator and water pump of KAMAZ-740.11-240, -740.13-260, -740.14-300 engines

Removing the straps

Регулировка и натяжение ремней приводов генератора и водяного насоса двигателей КАМАЗ-740.11-240, -740.13-260, -740.14-300

Using a 17 spanner and a 17 spanner, loosen the nuts securing the front and rear supports of the generator

We loosen the bolt 1 (Fig.) fastening the bar and the bolt 2 fastening the bar to the generator

Turning the generator down, remove the belts from the pulleys 3, 5 and 6

Belt installation

We install belts in the streams of pulleys 3, 5 and 6

Moving the generator up, using a mounting blade, tighten the bolts 1, 2 fastening the generator bar

A correctly tensioned belt, when pressed on the middle of the largest branch with a force of 39.2 N (4 kgf), should have a deflection of 15-22 mm

Tighten the nuts securing the front and rear supports of the generator.

Adjustment and tension of drive belts for generator and water pump of KAMAZ-740.30-260 engines (740.30-3902001RE)

 Регулировка и натяжение ремней приводов генератора и водяного насоса двигателей КАМАЗ-740.30-260 (740.30-3902001РЭ)

Adjusting the tension of the V-ribbed belt for engines with the fan located above the crankshaft axis is shown in Figure 9

The tension of the hydraulic clutch drive belt 11 is regulated by the movement of the tension roller 6

The tension of the belt 10 of the drive of the generator and the water pump is as follows:

  • - loosen the nut 9 fastening the generator;
  •  loosen bolts 7 and 8, fixing the generator bar;
  • - moving the generator, tighten the belt;
  • - tighten the nut 9, bolts 7 and 8

After adjustment, check the tension:

- a correctly tensioned belt, when pressed on the middle of the largest branch with a force of 44.1 ± 5 N (4.5 ± 0.5 kgf), should have a deflection of 6-10 mm.

When applying force F = (44.1 ± 5) N ((4.5 ± 0.5) kgf) to the middle of the belt branch AB, the deflection L should be 6-10 mm (Figure 9)

Adjustment and tension of the drive belts of the generator and water pump of the KAMAZ-740.30-260 engines of the bus configuration

Регулировка и натяжение ремней приводов генератора и водяного насоса двигателей КАМАЗ-740.30-260 автобусной комплектации

Adjustment is carried out by changing the position of the generator 1 (Fig. 10) in the following sequence:

  • - loosen bolts 9, 13, lock nut 10 and nut 12;
  • - move the generator 1 using the tension bolt 11;
  • - tighten bolt 9, 13, lock nut 10 and nut 12

After adjustment, check the tension:

- a correctly tensioned belt, when pressed on the middle of the largest branch with a force of 44.1 ± 5 N (4.5 ± 0.5 kgf), should have a deflection of 6-10 mm

Adjustment and tension of drive belts for generator and water pump of KAMAZ-740.50-360, -740.51-320 engines

Регулировка и натяжение ремней приводов генератора и водяного насоса двигателей КАМАЗ-740.50-360, -740.51-320

Adjusting the tension of the V-ribbed belt 2 (Figure 11) of the generator drive and the water pump for engines with the fan located along the crankshaft axis is performed as follows:

  • - we loosen the bolt 11 for fastening the rear leg of the generator, the nut 10 for fastening the front leg of the generator, the bolt 8 for fastening the generator bar, the bolt 5 for fastening the tension bolt;
  • - by moving the nut 6 we provide the necessary belt tension and with the nut 7 we fix the position of the generator;
  • - tighten bolts 5, 8 and 11 and tighten nut 10

After adjustment, check the tension:

- correctly tensioned belt 2 when pressing on the middle of the largest branch with a force of 44.1 ± 5 N (4.5 ± 0.5 kgf) should have a deflection of 6-10 mm