Technical data

34
3.3.3. Checking the Coolant Level
Remove the radiator cap and check the coolant level, which must be 50-60 mm lower
than the upper end of the filler neck. Do not allow the level to fall lower than 100 mm from the
upper end of the filler neck.
3.3.4. Draining the Coarse Fuel Filter
Drain the coarse fuel filter every 125 service hours.
Unscrew the sediment drain plug located in the lower portion of the filter sleeve as
shown in Fig.13 and drain the sediment until the fuel flows clear and replace the plug.
Fig. 13 – Draining the coarse fuel filter.
3.3.5. Checking the Fan Belt Tension
Check the fan belt every 125 service hours.
The fan belt tension is considered to be normal, if when applying the force of 40 N (4
kgf) to the belt at the section between the crankshaft pulley and alternator pulley, as shown in Fig.
14, its deflection is within the range 0.59-0.87 in (15-22 mm) for the D-243 engine and its modifi-
cations and 12-17 mm for the D-245 engine and its modifications.
To adjust the belt tension, loosen the alternator mounting pivot. Adjust the belt tension
by rotating the alternator body. Tighten the strap fastening bolt and the alternator fastening bolts.