MTZ 1220.3 - Front Driving Axle

MTZ 1220.1/1220.3 Section J. Possible failures
М5
Defect
,
external
manifestation
Way of elimination
•
Relief or failure of squeezing springs
of pedals, working cylinders, press-
ing discs.
Replace springs.
Differential block does not work
Clutch discs are greasy.
Eliminate oil running, wash out the disks.
Worn frictional overlays of lockup clutch
disks
Replace assembled disks.
Diaphragm of clutch block is damaged.
Replace diaphragm.
Low pressure of oil, being brought to opera-
tive mechanism of block.
Check pressure, being brought to clutch of
differential block. It should be 9…10 kilo-
gram-force/sm
2
.
Electro hydraulic valve of dif
ferential block
control does not work.
Check serviceability of safety device
s, relay
and other elements of line, eliminate defect.
Rear
power take off does not transfer full torque or continues to rotate when di
s-
engaged
Because of significant deterioration of fric-
tional overlays of brake tapes or due to
another reason adjustment
of operation is
disturbed.
Adjust mechanism of Power Take Off con-
trol
Defect of control hydraulic system.
Contact a qualified specialist.
Front driving axle
Insufficient
draft
of
front
driving
axle
Clutch of driving does not tran
s
fer torque:
There is no oil pressure in clutch booster. Disassemble and wash out details of dis-
tributor.
•
Slipping of drive clutch
Check and regulate pressure in hydro sys-
tem of transmission (9...10 kilo
gram
force/sm
2
). Replace worn out disks.
•
Defects in electric line
of front driving
axle control.
Determine and eliminate defects.
Insufficient size of torque being transferred by clutch because of oil leakage in h
y-
dro system:
•
Deterioration of rubber sealing rings.
Replace rings.
•
Deterioration of piston rings and clut
ch
drum;
Replace rings.
•
Deterioration of interfaced surfaces
“holder – nave of drum”, “drum – pis-
ton”
Replace worn out details.
Drive of front driving axle does not work in automatic mode
Deterioration of a
djustment or refuse from
switch of automatic switch-on gauge.
Adjust position of switch or replace it.
High noise and heating in zone of main gear
Gap in gears bearings of main gear. Adjust bearings of gears.
Wrong gears engagement of the main gear.
Check and if it is necessary ad
just interlock
on spot of contact.