Checking the tension of the drive belts of the generator, water pump, compressor D-245E3
Check every 5 thousand kilometers.
Check using the KI-8920 device in the following order:
- - bring the device to its original position, to do this, set the load indicator 23 (Figure 1(a, b)) to zero with the button and move the movable segments 19 and 20 apart so that their lower ends are at the same level;
- - install the device in segments on the belt to be checked in the middle of the span between the pulleys and press the handle body 18, following the indication of the load indicator 23;
- - as soon as the load on the belt reaches the set value (see the table in Figure 1(a, b), remove the device and determine the amount of belt deflection on the scale 22 printed on the segments;
If the deflection of the belt does not correspond to the required value indicated in the table, adjust its tension.
If there is insufficient tension, the belts slip and wear out quickly, and the diesel engine overheats.
Excessive tension on the belts causes them to stretch and also causes accelerated wear on the water pump, alternator and compressor bearings.
Figure 1a - Belt tension control scheme for diesel engines D-245.7E3, D-245.9E3
Figure 2b - Belt tension control scheme for diesel engines D-245.30E3, D-245.35E3
To adjust the tension of the drive belts of the generator and the water pump on diesel engines D-245.7E3, D-245.9E3, D-245.30E3, loosen the nuts for fastening the bolts 13 for fastening the legs of the generator and the bolt 12 for fastening the generator to the bar 11.
Turn the alternator housing to adjust the belt tension.
Tighten the bolt securing the generator to the bar and the nuts of the bolts securing the legs of the generator.
If one of the belts is worn or damaged, replace as a set (both belts).
To tension the compressor drive belt on a D-245.9E3 diesel engine, loosen the nut fixing the tension roller 15 and the lock nuts 17.
By turning the tension screw 16, tension the belt by moving the tension roller 5.
Tighten nuts 17 and nut 15.
The D-245.35E3 diesel V-ribbed belt is equipped with an automatic tensioner 6 and does not need tension adjustment.