Technical data

27
In case of leaving the tractor (machine) on the open place at the end of the shift, set the
fuel pump control lever to the position corresponding to the maximum feed to facilitate the sub-
sequent start.
2.2.2. Troubleshooting
Possible troubles in the diesel engine during the operation and recommendations for cor-
rective actions are enlisted in Table 3.
Table 3
Trouble and its appearance Remedy
1 The diesel engine fails to start
1.1 Air in the fuel system Purge the system by means of the manual prim-
ing pump. Eliminate the suction of air in the fuel
system
1.2 Fuel pump is faulty Remove the fuel pump from the diesel engine
and send it to the repairing workshop
2 The diesel does not develop full pow-
er
2.1 The fuel pump controlling lever does
not reach the stop
Adjust the fuel pump controlling rods
2.2 The filtering element of the fine fuel fil-
ter is clogged
Replace the filtering element of the fine fuel filter
2.3 The fuel injectors are faulty Locate faulty fuel injectors, wash the atomizers
and clean their nozzle holes, if necessary, replace
the atomizers
2.4 The injection dwell angle is set improp-
erly
Set the ignition dwell angle as recommended
2.5 The air cleaner of the diesel engine is
clogged
Perform the air cleaner maintenance
2.6 The fuel pump is faulty Remove the fuel pump from the diesel engine
and send it to the repairing workshop
2.7 The supercharging pressure is reduced Remove the turbo-supercharger from the engine
and send it to the repairing workshop
3 The engine idling is unstable
3.1 Penetration of air into the fuel system Remove air from the fuel system
3.2 The idling spring of the fuel pump is not
adjusted
Adjust the idling spring (in the engines with the
4UTNI and 4UTNI-T fuel pumps)
3.3 The fuel pump is faulty Remove the fuel pump from the diesel engine
and send it to the repairing workshop
4 The engine emits smoke in all the operating modes
4.1 The engine emits black smoke
4.1.1 The engine air cleaner is clogged Perform the air-cleaner maintenance
4.1.2 The fuel injector atomizer needle is
stuck
Find the faulty injector, clean or replace the at-
omizer and adjust the injector
4.1.3 The fuel pump is faulty Remove the fuel pump from the diesel engine
and send it to the repairing workshop