Technical data

56
Check the condition of the turbo-supercharger according to the rotor running-down time
after stopping the diesel engine. To do this, the diesel engine should be set to the maximum idling
speed after running for 3-5 minutes at the minimum idle speed and then shut the fuel delivery.
After stopping the diesel engine the rotation of the turbo-supercharger shall be heard for
at least 5 s. The steady sound of constant level with gradual attenuation is evidence of normal
condition of the turbo-supercharger.
One of causes of the diesel engine power loss and excessive smoking can be reduction of
the supercharging pressure due to clogging the flow-through part of the compressor, which can
be determined by impeded rotation of the rotor. If the rotor rotation is impeded, it is necessary to
perform the partial disassembly of the turbo-supercharger and washing the compressor portion.
Before disassembling, clean thoroughly the external surfaces of the turbo-supercharger
from dirt and dust.
To prevent the damage of the blades when disassembling and reassembling the turbo-
supercharger, do not put the middle housing together with the rotor onto the compressor turbine
wheel. For this purpose it is necessary to use a special support for this purpose.
The partial disassemble, washing and assembling should be performed in the following
order:
- unscrew the bolts fastening the compressor housing to the middle housing and discon-
nect the compressor housing from the middle housing;
- wash the compressor housing, and surfaces of the wheel and middle housing in pure
diesel fuel;
- connect the compressor housing to the middle housing having inserted a paronite gas-
ket between the flanges. When mounting the compressor housing, pay attention to the proper ori-
entation of the compressor exhaust pipe relatively to the turbine housing flange;
- pour 0.34-0.51 oz liq US (10-15 g) of pure oil into the oil channel of the middle hous-
ing and, while pressing the rotor faces by fingers from each side in turn, turn the rotor several
times to check the rotation for smoothness and absence of jamming.