CG938H Wheel Loader. Manual - part 24

 98

Operation of Loader 

In order to avoid industrial injuries, anyone shall not work on or near the loader. At any 

time, the loader shall be under control. 

In driving at the busy downtown area or over a high place, the speed shall be reduced. 

Prior to downgrade, the gear shall be selected. In downgrade, the gear shall not be 

changed. The same gear for downgrade as the one for anabatic driving is a better practical 

method.  

The engine’s excessive speed for downgrade is not allowed. In downgrade, the 

excessive speed of the engine may be reduced by the brake pedal. 

The load will push the loader downgrade. At the beginning of downgrade, the gear shift 

lever shall be placed at the first gear. 

For the operation, the following items shall be noted: 

1． Regulate the driver’s chair. 

2． Lift the working device to avoid running against the obstruction. 

3． As the braking oil pressure reaches the normal value, the parking brake shall be loosened. 

4． Turn the transmission control rod to the required speed position, and pull it to the 

required direction (at the beginning of machine’s start, only I and II gears are available). 

5． Step on the accelerator pedal to make the engine at the required speed. 

6． Step on the parking pedal to avoid movement of the loader. 

7． As the loader advances, the driver shall have a good vision and control sense. 

Caution 

In order to ensure comfortable operation and maximum service life of driving 

element, speed reduction or brake shall be conducted prior to change of direction and 

gear. 

Caution 

During the period of drive, braking with parking brake will wear and damage the 

parking brake seriously. 

Warning 

After starting and preheating of the engine, if the low brake pressure alarm lamp 

lights continuously, the engine shall be stopped immediately for examination. After the 

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alarm lamp lights off, the engine may be operated, or not, your driving safety would be 

endangered. In case the brake pressure alarm lamp lights during the period of drive, it 

shall be stopped immediately for examination. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 100

II Operation Technology 

2.1 Common Technology 

In operation, in order to widen the drivers’ vision and 

stabilize loading, the bucket shall be lowered and kept about 

40cm above the ground. 

 

Use the wait time to level the working area. 

 

Avoid more stress of the bucket to make the loader 

have enough tractive force. 

Use cutting teeth to load the relatively hard materials. 

 

 

 

 

 

 

 

 

In bucket reversion, the joy stick (1) shall     be 

placed at the position of bucket reversion. And then turn 

back it to the original position. Repeat the operation until 

materials are unloaded. 

In order avoid dust into the engine and keep visibility, 

the bucket shall be reversed leeward. 

Ensure the bucket is consistent with working 

requirements. Overload will shorten the service life of the 

loader. 

 

1 

 101

Scraping 

Note:    Scraping is not allowed as the bucket is at the forerake position so as to 

prevent the bucket from damage. 

In scraping, the bottom of the bucket shall be parallel to the ground. 

Bucket Reversion 

Use the bucket stopper for maximum reversion angle. 

z  Unnecessary repeated collision with the stopper will accelerate its wear. The charge of 

repairing linkage gear of the working device is very high. 

2.2 Loading of Stockpile 

1． Level the bucket and scrape the ground slightly. Hold advance I gear to make the bucket 

directly insert into the stockpile. 

2． Make the joy stick of the moving arm at the position of lifting, and operate the joy stick of 

the bucket to make the bucket incline backward slowly for 2-3 times for full loading.   

3． After the bucket is filled, the bucket stays at the backrake position, and the joy stick of the 

bucket stays the central position. 

4． Lift the bucket enough high to avoid the stockpile. Make the transmission control rod at 

the reverse gear to drive the loader backwards. 

5． As the loader reverses to the certain position, lay down the bucket to the transport position 

about 40cm away from the ground. Push the transmission control rod to the required gear 

to transport the materials. 

6． As the loader reaches the reversion unloading area, make the joy stick of moving arm at 

the position of lifting until the bucket unloads all materials.