Possible Defects And Ways Of Their Elimination - Belarus 1221B.2 Operator's Manual

BELARUS-1221.2/1221В.2/1221.3

POSSIBLE DEFECTS AND WAYS OF THEIR ELIMINATION

Defect, external manifestation
Air in fuel system.
Oil pump is out of order.
Fuel filters are littered.
The engine is not enough warmed up.
Lever of fuel pump control does not reach
against arrester.
Filtering element of fine fuel filter is clogged.
Faulty injectors.
Wrong fuel injection advance angle.
Pressure of boost has decreased.
Air gets in fuel system.
1. Black fume is emitted from the exhaust pipe
Engine air cleaner is clogged.
Injector atomizer needle hovers.
Defective fuel pump.
Engine overload.
Wrong fuel injection advance angle.
2. White fume is emitted from the exhaust pipe
Engine is not heated.
Hit of water in fuel.
Clearances between the valves and the rockers
are not adjusted.
Fuel injection advance angle setting is dis- Set the recommended fuel injection advance
Engine doesn't start
The engine does not develop full power
Diesel engine fumes in all operating modes.
Possible defects and ways of their elimination
Way of elimination
ENGINE
Pump over system by means of pump of
manual fuel pumping. Remove air inflow in
fuel system (see section "Description and
operation").
Take off fuel pump from the engine and
hand over to workshop for repair.
Wash out the coarse fuel filter and replace
filtering elements of fine fuel filter.
Warm up diesel engine in cold weather by
means of available means of start simplifi-
cation.
Adjust the rods of fuel pump control.
Replace filtering element.
Find the faulty injectors, wash and adjust them.
Set the recommended injection advance angle.
Remove turbocharger from engine and
send it to workshop for repair.
Pump over fuel system by means of pump
of manual pumping.
Carry out technical maintenance of air
cleaner.
Find defective atomizer, wash out and re-
place injector, adjust atomizer.
Remove the fuel pump from the engine and
send it for repair.
Reduce diesel loading engaging low gear.
Set the fuel injection advance angle (see sec-
tion "Appendix")
Warm up the engine; maintain the cooling liquid
temperature within 75 - 95°C during operation.
Replace fuel.
Adjust the clearances between the valves and
the rockers
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