Crawler crane 15 kinds of common fault analysis

1. The engine won't start.

When the battery power is insufficient, low voltage. 2 start line fault, the start switch is damaged. (3) start motor electromagnetic switch or start motor damage. (4) there is air in the fuel system, fuel filter clogging. 5] fuel oil supply failure. [6] engine crankshaft tile burning, to rotate the crankshaft cannot. Once the engine piston and cylinder liner glued to death, the piston can't activities.

2. The engine operation instability, high load suppress car.

(1) there is air in the fuel system. 2 fuel filter clogging. (3) the fuel oil transfer pump wear and low pressure. (4) fuel injection pump wear and low pressure. 5] injector wear and fuel atomization is bad. [6] injection timing is not correct.

3. The engine power is insufficient, exhaust smoke.

(1) air filter clogging. 2 waste gas or damage to the formation of the turbocharger. (3) electronic control system has a fault (monitor information display). (4) oil transfer pump, fuel injection pump or a fault injector. 5] injection timing is not correct. [6] piston, piston ring and cylinder liner wear. Once the valve closed lax or defective, valve clearance is not correct.

4. Under the engine displacement.

Piston, piston ring and cylinder liner wear.

5. The engine burning oil, engine oil consumption.

(1) the oil amount too much. 2 the piston, piston ring and cylinder liner wear. (3) exhaust turbocharger floating oil seal damage. (4) valve tube rupture.

6. There are oil in tank.

(1) oil cooler core burst. 2 pumps water seal is damaged, drain plug. (3) cylinder pad broken to pieces.

7. Oil oil bottom with coolant.

(1) oil cooler core burst. 2 cylinder pad broken to pieces. (3) crack in cylinder head or cylinder.

8. Low oil pressure.

(1) the oil is enough. 2 oil in diesel oil, cooling fluid. (3) oil filter clogging. (4) oil pump suction pipe leakage. 5] oil relief valve (bypass valve) binding in overflow state or spring break. [6] oil pump wear. Once the crankshaft or the camshaft and between bearing clearance is too large.

9. The water temperature is too high.

(1) less liquid cooling capacity. 2 thermostat damage. (3) the belt loose, fan speed is low. (4) the pump damage. 5] engine overload operation. [6] tank internal or external to jam. Once the engine internal mechanical failure.

10. The generator is not charging or charging efficiency is low.

(1) battery joint damage. 2 charging circuit or ground loop malfunction. (3) engine brush wear. (4) regulator or rectifier diode damage. Damage (5] rotor excitation coil).

11. Hydraulic pipe shaking, hydraulic pump abnormal sound.

(1) hydraulic pump in the air. 2 hydraulic pump in inclined plate or plunger wear boots.

12. Walking wandering.

(1) track up tightness improper adjustment. 2 the corresponding motor inside leaking, or damage of reducer. (3) in the hydraulic pump discharge, the flow is small. (4) walking control pilot circuit malfunction, or walk the main circuit fault. 5] within the central swivel joint damage of oil seal, oil.

13. Walking speed is slow.

(1) pilot control oil or the main lines component failure. 2 pilot pump or hydraulic pump failure. (3) within the central swivel joint damage of oil seal, oil.

14. Walking climbing ability, digging.

(1) the primary loop, pilot circuit fault, low pressure relief valve. 2 the corresponding safety relief valve, balance valve, such as cushion valve failure. (3) hydraulic pump, the forerunner the pump and the operating valve leakage.

15. A electric circuit function.

(1) the corresponding fuse damage. 2 the circuit components damaged or lead failure.