KIROVETS K-744R1, K-744R2, K-744R3, K-744R4 tractors
174
Fault
Troubleshooting
- excessive oil heating;
- jamming of gate valves in the housing of hydraulic
distributor irrespective of the oil temperature.
Eliminate the fault as specified above.
Replace the hydraulic distributor.
Increased draft of implement in the transportation
position with hydromechanical valves closed - in-
sufficient leak-tightness of the hydraulic cylinder
piston.
Check the leak-tightness of hydraulic cylinders for lifting.
Faults of pneumatic system
Lighting up of the “parking brake is activated” in-
dicator lamp with the engine in operation and the
parking brake deactivated:
- air leak in the parking brake circuit.
Eliminate the air leak.
No pressure in one or two air cylinders.
The triple safety valve is faulty (see the diagram in the
appendix).
Replace the valve.
Pressure controller often actuates with the pneu-
matic system filled.
Air leak through connections of the pneumatic sys-
tem.
Eliminate the leak by tightening the connections (deter-
mine the leak area “by ear” or “by touch”).
Air leak through one of the pneumatic units.
Replace the unit.
Ineffective braking or no braking with the brake
pedal fully pressed.
Travel of brake chamber stems is not adjusted.
Adjust it.
Brake valve is faulty.
Connect pressure gauges to the valves of reference out-
let of the brake valve upper and lower sections. If the
pressure by pressure gauge readings is less than by the
instrument panel indicator (Fig. 6) at the full travel of the
brake valve lever, replace the brake valve.
Air leak from brake chambers.
Replace the chamber membrane.
Electrical equipment faults
Electrolyte level decreases very fast:
- leak of electrolyte from battery jars;
Repair or replace the storage battery.
- the voltage controller maintains a high level of volt-
age in the electrical system of the tractor.
Replace the generator.
The turn indicator lights are faulty:
- the fuse is blown;
Eliminate a short-circuit in the wiring, after which replace
the fuse.
- a faulty contact in the terminal connections or a wire
break;
Restore the contact in the terminal connections, check
the electric wiring serviceability.
- faulty disconnecting relay of the turn indicator;
Replace the disconnecting relay.
- light lamps are burnt out.
Replace the lamps
Rattling noise of the sound signal:
