80-0000010B OM
349
7. POSSIBLE FAILURES AND INSTRUCTIONS FOR TROUBLE-
SHOOTING
7.1 Possible failures of the engine and instructions for troubleshooting
A list of possible engine failures of BELARUS-80.1/82.1/820 tractors and instruc-
tions for their troubleshooting are given in table 7.1.1.
Table 7.1.1
Failure,
external manifestation, cause
Troubleshooting
The engine will not start
Air in fuel system Bleed the system with a manual fuel priming pump. Elim-
inate air suction in the fuel system
Fuel pump failure Remove the fuel pump off the engine and send it to
a workshop for repair
Fuel filters are clogged Rinse the coarse fuel filter and replace the filter
cartridge of the fine fuel filter
The engine does not increase power
Fuel pump control lever does not
reach the stop
Adjust the control rods of fuel pump
Filter cartridge of the fine fuel filter is
clogged
Replace the filter cartridge of the fine fuel filter
Nozzles are out of order Detect the failed nozzles, rinse and adjust them
Fuel injection advance angle is in-
correctly adjusted
Set the recommended fuel injection advance angle
Engine air cleaner is clogged Perform maintenance of the air cleaner
Fuel pump is out of order Remove fuel pump off the engine and send it to a
workshop for repair
The engine fumes at all operation modes: black smoke comes out of the
exhaust pipe
Engine air cleaner is clogged Perform maintenance of the air cleaner
Nozzle atomizer needle is stuck Detect the failed nozzle, rinse or replace the atom-
izer, adjust the nozzle
Fuel pump is out of order Remove the fuel pump off the engine and send it to
a workshop for repair
The engine fumes at all operation modes: white smoke comes out of the
exhaust pipe
The engine operates with over-
cooling
Warm up the engine, during operation maintain the
coolant temperature in the range 85-95°С
Water ingress into fuel Replace the fuel
No gap between gaps and rocker
arms
Adjust gaps between valves and rocker arms
Fuel injection advance angle is in-
correctly adjusted
Set the recommended fuel injection advance angle
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