MTZ 1220.1/1220.3
Section
М
. Possible failures
М
4
Defect, external manifestation
Way of elimination
Coupling
Coupling slips
There is no pedal free travel.
Adjust pedal free travel.
Linings of driven disks are worn-out.
Replace linings or assembled driven disks.
The clutch is not disengaged fully
Increased pedal free travel.
Adjust pedal free travel
Gear box, back axle
Complicated switch in of gears
“Drive” coupling.
Adjust.
Low pressure in hydraulic system of transmission
Insufficient quantity of oil amount in case of
transmission.
Add oil in case up to a label “
П
” ±5 mm on
glass of oil-gauge glass.
Bedding of relief valve.
Wash out valve and adjust it in case of ne-
cessity.
Pollution of screen filter of hydrosystem of
gear box.
Wash out filter.
High pressure in hydraulic system of transmission
Bedding of relief valve.
Wash out valve.
There is no pressure in hydraulic system of transmission when the engine is run-
ning and tractor doesn’t move
Drive of pump is carried out from moving
system.
Switch pump to drive of diesel engine.
Increased noise in main conical pair
Adjustment of interlock of pinions of main
gear and bearings of differential is dis-
rupted.
Adjust interlock and backlash in bearings.
Brakes
Unsatisfactory work of brakes (brakes do not hold)
Adjustment of brakes operation is disturbed. Adjust brakes control
Oiled and worn lining of brake disc.
Wash out overlays. If necessary replace
discs.
Seal failure of working cavities of main and
working cylinders because of damage of
collars.
Replace collars. Pump over system.
Non-disinhibition of brakes
There is no free course of pedals.
Adjust
Jamming of cuffs of main and working cylinders because of:
•
Pollution and corrosion of working sur-
faces.
Replace protective covers. Clear cylinders,
wash out, remove corrosion.
•
Swelling of cuffs owing to mineral oil
hit.
Wash out system. Replace cuffs.
Incomplete return of pedals to a starting position after braking
•
Jamming of profile flutes in press
disks:
Replace press discs.
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