MTZ 1220.3 - Gear Box, Back Axle

MTZ 1220.1/1220.3 Section М. Possible failures
М4
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 hy
drosystem of
gear box.
Wash out filter.
High pres
sure 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 ru
n-
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 nec
essary replace
discs.
Seal failure of working cavities of main and
working cylinders be
cause 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 cy
l
inders because of:
•
Pollution and corrosion of working sur-
faces.
Replace protective covers. Clear cylin
ders,
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.