KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
172
Fault
Troubleshooting
Maladjustment of the drain gate valve control
drive:
Slow return of the drain pedal. Increase of the shifting
force, jamming at changeover N-1, 1-N with the drain
pedal fully pressed. Drain pedal stuck at the 1st gear.
Adjust the drain pedal drive. With the wire rope drive ad-
justed correctly, the drain pedal in the depressed position
shall rest against the bolt with the gear control drain lever
turned all the way in clockwise. With the drain pedal re-
leased, the drain lever should be turned all the way in
clockwise. If necessary, replace the remote control wire
rope.
Oil leaks from driving axles:
- increased oil level;
Drain the excess of oil.
- breather contamination;
- failure of seals.
Wash and blow off the breather.
Replace the seals.
Jerks at taking off and hammering - loosened at-
tachment of the connecting flanges of cardan
shafts.
Tighten the nuts.
Increased heating of shafts at the area of bearing
assemblies of cardan shafts - absence of lubri-
cants, ingress of dust and dirt due to collar dam-
age and wear.
Clean and wash oil-conducting channels of the crossbar.
Replace worn and damaged parts.
Faults of the steering control hydraulic system
Oil foaming and discharge through the filler port
of the hydraulic tank:
- insufficient amount of oil;
- air inflow in pipelines connecting the hydraulic
tanks to pumps.
Refill oil.
Eliminate the air inflow to the connecting pipelines or over
the plug of siphonal device at the center of the upper wall
of hydraulic tanks.
Tractor and the steering wheel do not turn:
- insufficient amount of oil in the hydraulic tank;
Fill oil into the hydraulic tank until the level appears in the
sight hole.
- the pumps do not rotate due to engine shutdown. Turn the lever on the engine shutdown PDR towards the
cabin.
Jamming of the gate valve or hydraulic motor of
the hydraulic steering wheel.
Replace the hydraulic steering wheel.
Difficult steering control:
- the pump performance is low or the flow controller
throttle is clogged;
Check the time of full tractor turn from one extreme posi-
tion to the other at the engine crankshaft speed of 1300
and 1900 RPM and at the maximum possible rotation
speed of the steering wheel.
