CG938H Wheel Loader. Manual - part 19

 

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(4) As the cold air is used in high temperature seasons, windows and doors shall be closed, or 

not the refrigeration effect will be weakened. 

z  Note: In refrigeration, please shut off the heat water valve (Make the handle of water valve 

and heat water pipe at 90°) 

Heat supply (1) The

 

Air-conditioning mode switch is at a upper position Turn off the temperature 

knob of the air conditioning clockwise at full, turn on the heat water valve and regulate the 

blowing rate switch. 

    (2) Appropriate temperature may be attained by regulating the heat water valve. 

z  As the engine fails to work for ambient temperature less than 0 , the engine radiator shall be 

℃

emptied or filled with anti-icing fluid so as to avoid the breakage of the pipe of the radiator of 

the heat supply system. 

z  The whole air conditioning system shall not be dismantled without authorization. The repairing 

shall be conducted a professional person. 

z  The belt shall be examined frequenty for proper tightness. 

z  The dirt on the surface of condensator shall be cleaned in time so as to avoid weakening the 

refrigeration effect. 

z  After discharging secondary refrigerant or 

repairing, the proper refrigeration oil shall 

be added depending on the amount of the 

one discharged. The secondary refrigerant 

discharged shall be recovered with the 

special equipment. 

z  The air conditioning shall be started for refrigeration one time biweekly during the season of 

winter so as to ensure the smooth operation of the system. 

Use of air vent and defrosting function 

Air vent--If necessary, the air direction may be changed by regulating the air guide sheet of the air 

vent. 

z  As the air conditioning is not used, the air vent shall be closed to avoid the access of the foreign 

substances. 

z  As the cold air is used in high temperature seasons, the window and door shall be closed, or not 

the refrigeration effect will be weakened. 

 

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z  As the engine is turned off, the air conditioning device shall not be used, or not the energy of the 

accumulator shall be wasted and difficult starting of the loader will be occurred. 

z  Please examine and maintain the air conditioning regularly for a long service life. 

Maintenance of filter element of air conditioner 

  The filter element of the air conditioner adopts highly effective air filter. When the air quantity 

changes or the filter element is dirty, the filter shall be replaced. The filter should be in compliance 

with ISO 10263-2. 

2.3 Accumulator 

Two accumulators connected in series are located at the same accumulator box. As the cross 

strapping is adopted, the anode cable (+) 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. 

The accumulator of this loader is free from maintenance, which is located at the right side of the 

rear end of the rear frame. For maintenance-free accumulator, the electrolyte may not be examined 

and water may not be added. It is safe in use and propitious to environmental protection. 

Examination over charging state 

The charging-state indication densimeter is attached on the cap. It may indicate the charging state: 

Green--Power over 65%, indicating that the accumulator is normal. 

Black--Power less than 65%, indicating that charging is required. 

White--The accumulator is bad and shall be replaced.   

Note: In order to ensure enough power of this loader for starting, please examine the charging 

state of the accumulator. The accumulator will discharge a kind of flammable fog that will 

cause explosion possibly. The electrolyte is a kind of acid substance and will harm skin and 

eyes. 

Use of external power source 

Make a primary diagnosis for the loader that fails to start. 

1． Turn the joy stick of the transmission box of the choke to neutral position. Put all working 

devices down. All joy sticks are placed at the holding position. Turn off the lock switch of the 

joy stick。 

 

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2． Turn the starting pre-heating switch of the choke to the central position and turn off all 

instruments and air conditioning etc. 

3． Help the started loader close the choke so as to facilitate wire connection. But two loaders shall 

not contact each other. 

4． Help to turn off the engine of the started loader. If the auxiliary power source is used, the 

charging system shall be turned off. 

5． Give attention to whether the wire connection of the accumulator is correct and tightened. 

6． Connect the anode (+) of the external power source to the anode (+) terminal of the discharged 

accumulator or the accumulator of choke. 

7． Connect another anode of the external power source (+) to the anode helping the starting of the 

accumulator. Identify the correct connector lug with the method of Step 6. 

8． Connect cathode of the external power source (-) to the cathode helping the starting of the 

accumulator.  

9． Lastly, connect another cathode of the cable to the frame (not the cathode column of the 

accumulator). The connection position shall be kept away from the accumulator, fuel, hydraulic 

pipe or moving elements. 

10．  Start the engine that helps starting of the loader or close the charging system assisting in 

starting. Two minutes at least are required to shut down partial charging of the loader. 

11．  After starting the flameout engine, the external power source shall be shut down immediately 

in the reverse order. 

12．  Summarize the causes for starting or charging failure of the choke. Now, the engine works and 

the charging system works normally. 

z  The accumulators connected in series are 

installed in the same accumulator box. 

Use the terminal connected with the 

starting motor. The accumulator and 

starting motor are situated at the same 

side of the loader. Any metal shall not 

contact the anode wire clip. 

2.4 Cab 

  The cab is full closed, in which anti-roll 

 

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and anti-falling structures are available. It is spacious and comfortable, and easy to be operated. 

Inclination adjustment of steering gear

 

The steering gear may be regulated upwards and downwards depending on the different 

drivers. 

To regulate the steering gear, the steering gear (2) shall be pulled upwards or downwards to the 

appropriate position according to needs as the adjusting locking rod (1) of the steering gear is pulled 

upwards, and loosen the adjusting locking rod (1) to lock the position of the steering gear. 

Chair 

MSG85/722 is the mechanical 

suspending driver chair with a hydraulic 

damper. The upper part of the whole chair 

is arc and has various functions. The 

suspending unit on the chair chassis is 

protected by rubber sleeve so as to avoid 

external sewage and dirt. 

Cushion and backrest are made with 

vacuum foam one-step molding technology   

Adjusting range: 

z  The backrest may be adjusted for 150mm forwards and backwards. 

z  The adjusting distance of the backrest’s elevation is 60mm. 

z  The adjusting of the backrest forwards is 12°, backwards 10°.   

z  The journey of the suspending device is 100mm. 

z  The adjustment between 50-130kg may be conducted according to the driver’s weight. 

Optional accessories: 

z  Backing block 

z  Armrest 

z  Safety belt   

As the fore and rear control locking rod (1) of the chair is pulled upwards, the chair may be 

moved to the wanted position forwards or backwards, and then release the locking rod to lock the 

chair. 

While pull upwards the backrest angle control rod of the chair (2), adjust the backrest to the