MTZ 1220.1, Operator'S Manual

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MTZ 1220.1/1220.3 Section М . Possible failures
М 2
Defect, external manifestation Way of elimination
B. White fume is emitted from the exhaust pipe
Diesel engine is not heated.
Warm up the diesel engine; maintain the cool-
ing liquid temperature within 75 - 95
°
C during
operation.
Hit of water in fuel. Replace fuel.
Clearances between the valves and the rockers
are not adjusted. Adjust the clearances between the valves and
the rockers
Fuel injection advance angle setting is dis-
turbed. Set the recommended fuel injection advance
angle.
C. Blue fume is emitted from the exhaust pipe
Ingress of oil into the combustion chamber as a
result of wear of cup-piston group components
Replace the worn-out parts of the cup-piston
group.
Excess of oil in the diesel engine crankcase. Drain the excessive oil, having set the level
against the upper mark of oil-measuring rod.
The diesel engine suddenly stops
The fuel is not delivered. Check up fuel in fuel tank, regularity of flu-
epipes, filters and pumping pump.
The diesel engine overheats
There is not enough cooling fluid in the di-
esel engine. Add cooling liquid up to normal level.
Radiator is polluted outside. Clear radiator.
Presence of dirt and scum in cooling sys-
tem. Clean and wash out cooling system from
dirt and scum.
Valve of thermostat does not open com-
pletely. Replace thermostat.
Insufficient tension of belt of fan:
•
Break of spring of tension device.
Replace spring. At impossibility to replace
spring it is supposed to block clutch of fan
having clamped bolt with nut placket of ge-
nerator and lever of idler.
•
Jamming of idler on axle.
Disassemble tension device and remove
defect.
Oiling of fan driving belt and pulleys. Remove driving belt and remove oil tracks
from belt surface and pulleys.
Oil pressure on warmed up diesel engine below admissible
Pressure index is defective. Replace pressure index after check of oil
pressure by control manometer.
Tightness of connections of oil pipelines is
broken. Reveal place of seal failure and restore it.