CG938H Wheel Loader. Manual - part 18

 

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5. 

  Engine waiting signal light 

6. 

  Signal light for water in engine fuel   

7. 

  Engine shutdown light 

8. 

 Remote indicator 

9. 

  Charging indicator- Indicating the engine and charging system’s work 

10. 

 Absorber signal light 

11. 

  Parking signal light 

12. 

 Low-voltage alarming light while braking 

13. 

  Hydraulic oil return blockage alarming light 

14. 

  Gear change alarming light-Indicating the oil pressure of working; the normal value 

is 1.6~1.8Mpa; alarms 1.6 Mpa below. 

15. 

  Air filter blockage alarming light   

16. 

 Concentrated lubrication indicator   

17. 

  Level alarming indicator 

18. 

  Left steering signal light 

19. 

  Right steering signal light 

20. Engine water thermometer -- indicating the temperature of the engine’s coolant. The normal 

 

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value is 80℃~92℃; 

21. Engine tachometer 

22. Oil-temperature gauge of torque converter-- indicating the working oil temperature of the torque 

converter. The normal value is ≤120℃; 

23. Engine oil pressure gauge-- indicating engine oil. The normal value is 0.25~0.45Mpa; 

24. Concentrated indication area- indicating the working hours, speed and mileage, gear change 

pressure; 

25. Fuel gauge 

26. Air-conditioning mode switch 

27. Blowing rate switch of air-conditioning 

28. Front working light switch 

29. Rear working light switch 

30. Emergency warning switch   

31. Working rotary switch   

32. Rear wiper switch 

33. Front wiper switch   

34. Switch of washer pump   

35. Power shutoff selector switch   

36. Idle regulation switch   

37. Failure diagnosis switch   

38. Temperature knob of air-conditioning 

39. Parking button 

40. Cigarette lighter 

41.  Key switch 

42.  Repairing socket 

43.   Intermediate Lube Switch (If Equipped) 

44. Joystick lock switch 

45.  Absorber switch  

46. Fuse 

47. Engine Service Tool Connector 

48. Radio 

 

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Caution 

It is suggested to use the emergency turning system under the circumstance that urgent 

turning to avoid obstruction is required as the paroxysmal normal turning system fails or 

engine shuts down. 

Warning 

If the emergency turning system is started frequently, the emergency turning unit will be 

damaged possibly. 

The electrical control system of this loader mainly is composed of two parts including 

electronic spray engine control system and control system for accessories including lighting, signal 

and alarm indicators, wiper, emergency shifter, air conditioning, lifting control and leveling control 

etc.

   

 

Warning 

Improper external power connection will result in personal injuries and death due to 

explosion. Accumulators connected in series shall be installed in a separate accumulator box. 

As the external power source is used, the cable joint (+) shall be connected with the 

accumulator’s joint (+) connected with the starter coil. The cable cathode (-) of the external 

power source shall be connected with the one of the 

starter. In case the cathode of the starter is not 

available, the cable cathode (-) of the external power 

source shall be connected with the body of the 

engine. 

 

3) Fuse box 

  Fuse box-- Installed at the right rear of the chair in the cab. 

Fuse--protecting the electrical system from the damage due to circuit overloading. The damaged 

fuse shall be replaced; in case the same new fuse is blew upon replacement, the circuit shall be 

examined and repaired. 

 

 

 

 

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Caution 

In replacement, the fuse of same model and specification is required, or not the circuit will 

be damaged possibly. In case frequently replacement of the fuse is required, the circuit is 

involved in failure possibly. The circuit shall be examined. 

2.2 Air conditioning System 

2.2.1 Basic operating method 

The air-conditioning system has three operation switches and knobs, temperature knob, 

air-conditioning mode switch and blowing rate switch, designed on the fore panel, as shown in the 

following figure: 

 Air-conditioning  Temperature  knob: It may be rotated anticlockwise or clockwise. If 

anticlockwise, the temperature is 

reduced, vice versa 

Air-conditioning mode switch: It 

has three positions. Press the upper 

position of the switch for heat suppy, 

lower position for refrigeration, and 

central position, both heat supply 

and refrigeration are not available.       

Blowing rate switch of 

air-conditioning The 

air-conditioning system’s rate has 

three levels. When the blowing rate 

switch is at the upper position, the rate is at a lower level, and central position middle level, and at 

the lower position, the wind amount will be increased gradually. 

  Refrigeration (1) for the first time the cooling system is used, blowing rate switch of air 

conditioning shall be rotated to the high speed after the engine is started (

 

Air-conditioning 

mode switch is at a lower position), and run for five minutes. 

    (2) Rotate the temperature knob of the air conditioning anticlockwise at full. At this time, the 

cooling system starts work. 

        (3) When the temperature is decreased to the required one, rotate the temperature knob of the 

air conditioning clockwise slowly until up to the required temperature. 

Air-conditioning 

mode switch

Wind amount 

switch 

Air-conditioning 

temperature knob 

Air-conditioning 

mode switch

Blowing rate switch

 

of 

air-conditioning 

Air-conditioning 

temperature knob