MTZ 1220.3 - Page 174

MTZ 1220.1/1220.3 Section М. Possible failures
М6
Defect
,
external
manifestation
Way of elimination
Noise at maximum angle of wheels rotation
Wrong operation mode of front driving axle.
Front driving axle works in compulsory
mode.
Check mode of inclusion of FDA drive and
install switch in position “switched off” or
“automatic”.
Wrong limiting angle of wheels turn.
Check and adjust.
Bang
in
pivot
at
movement
Adjustment of pivots bearings is disturbed. Check and adjust.
Bang in front driving axle at sharp turn of wheels
Gaps in pins of steering draft and hydro cy-
linders of turn.
Check and adjust.
Dribbling
of
greasing
through
cuff
of
main
gear
flange
Deterioration and damage of flange cuff.
Replace worn out parts.
Dribbling of greasing through breathers of wheel reduction gears
Increased level of oil. Check and adjust correct level.
Dribbling of greasing through cuff of main gear of wheel reduction gear.
Increased backlash in gears bearings. Check and adjust.
Deterioration and damage of cuff. Replace cuff.
Angular frictions of wheels
Axial backlash in bearings of wheel reduc-
er pivots.
Check and adjust.
Increased backlash in bearings of front
wheels.
Check and adjust backlash in flange bear-
ings.
Backlash in bearings of hydro cylin
ders of
hydrostatic steering.
Replace worn out details.
Increased d
eterioration
and ply separat
ion of front wheels tires
Adjustment of wheels convergence is dis-
rupted.
Adjust convergence as it is shown in sec-
tion “Adjustments”.
Inadequacy of air pressure in tires to rec-
ommended norms.
Maintain pressure in tires in accordance to
recommendations (see section “Aggrega-
tion”).
Front drive is constantly positively en-
gaged.
Check switch-on – switch-off of front driv-
ing axle. When the disorder is found –
eliminate it.
Steering
Increased effort on steering wheel
Lack or insufficient pressure in hydra
u-
lic system of steering because of:
(Pressure in hydrosystem of steering
should be 140...155 kilogram-force/sm
2
(in arrester))
•
Insufficient oil level in tank; feeding
pump does not develop necessary
pressure.
Fill in tank with oil up to necessary level
and pump up hydrosystem for air removal
•
Safety valve of pump-dosator ho-
vered in open position or it is ad-
justed to a low pressure.
Wash out safety valve and adjust pressure
for 140...155 kilogram-force/sm
2
at diesel-
engine work at nominal turns.
•
Significant friction or shimming in me-
chanical elements of steering col-
umn.
Check and eliminate reasons preventing
steering column from fluent motion in me-
chanical elements.
•
Air leak into absorbent main line of
system.
Check absorbing main line, eliminate lea-
kage. Pump up system for air remove.