CG938H Wheel Loader. Manual - part 25

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2.3 Loading with A Truck 

For the four loading methods above, the operation method with a short cycle time (for 

one time of loading) may be chosen depending on the situation on site. 

1． Enough distance shall be available to make the bucket reach the lifting height prior to the 

loader reduce the speed. 

2． Place the bucket at the middle of the truck to unload materials. In case the length of the 

truck body is two times of the bucket, the materials shall be unloaded to the back from 

the front of the body. 

3． Advance the joy stick of the bucket to reverse the bucket. 

4． Shake off the materials stuck on the bucket. Rapidly push and pull the joy stick of the 

bucket to make rocking arm touch the stopper. 

5． Make the joy stick of the bucket at the position of taking-back bucket. 

6． Prior to laying down the bucket, please note whether the truck is outside the bucket. 

7． Lay down the bucket as another bucket will be installed on the loader. 

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

of repairing linkage gear of the working device is very high. 

2.4 Loading of Hard Soil 

z  The collapse of materials will cause personal injuries and death. 

T-shaped cycle 

V-shaped cycle

L-shaped

cycle

I-shaped

cycle

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z  Remove suspender and note the materials slid. 

1． Load hard soil from the bottom to the upper surface 

2． Lift the bucket slightly and leave the soil stack. 

2.5 Excavation 

1. Lay the bucket on the ground and make it have a small excavation angle. 

2. Prior to the loader advances, press the bucket downwards, and make the lifting joy stick of 

the moving arm at the position of holding when the bucket reaches the enough depth. 

3． Keep the bucket leveled scraping and excavation by lifting and laying down the bucket. 

4． As the bucket is filled, take back the bucket to make it run against the stopper. Drive the 

loader to the material unloading position when the bucket is away from the ground for 

40cm. 

2.6 Loading to Bucket 

1.  Fill the bucket (See “Loading of Stockpile”). 

When the bucket reaches the lifting limit position, materials may be loaded to the chopper 

leeward if possible.53 

2.7 Application of KD Key 

The KD key (1) is designed at the topside 

of the speed operating rod with the purpose to 

improve the operation efficiency. Its application 

technology is given below: 

1. As the loader advances to and near the 

stockpile at the speed of II gear, press the KD key 

(1), and whole machine will be at the speed of I 

gear from the previous II for maximum tractive force. 

2. As the shifting handle is turned to the reverse direction upon the completion of loading 

work, the loader will back to II gear automatically (reverse and advance are II gear) for the 

relatively high speed to finish the loading work; 

3. Repeat steps 1~2 to use the KD key for a higher operation efficiency. 

 

1 

 104

Loader’s Parking 

Parking  

Caution 

The loader shall be parked on the leveled ground. If on a slope, the wheels shall be 

padded well. 

Do not close the parking brake while driving under exceptional circumstances   

 

1． Step on the service parking pedal to stop the loader. 

2． Make the shifting handle at the neutral position 

3． Close the parking brake. 

4． Place the bucket on the ground and press it slightly. 

 

Shutdown of Engine 

1． After parking, the engine shall be idled at a low speed for 5 minutes. 

2． Turn the key switch to flame out the engine. 

3． Take away the key. 

4． Hold ladder with both hands and step down along the ladder facing the loader. 

5． Examine whether there exist some foreign substances in the engine cover. The foreign 

substances and paper shall be got rid of to avoid fire. The flammables at the bottom of 

the loader shall be eliminated to reduce the occurrence the fire. 

6． Turn off the power switch   

7． Install all protective covers and locks. 

8． After parking in winter or at a cold place, if the cooling liquid is not be added with 

antifreeze, the water drain valve or water blocker on the engine body, radiator and intake 

etc. shall be opened to discharge the cooling water in order to prevent freezing. 

 

 

 

 

 105

Repairing and Maintenance 

Appropriate tools: 

    We suggest that the user should select the service tools in accordance with the 

ISO4510 Earth-moving machinery Service tools-Part 1: Common maintenance and 

adjustment tool. Delivery tools please see the “ PACKING LIST”. 

Only the tools applicable to the working task may be used. The use of damaged, 

poor-quality and defective or temporarily substituted tools will possibly result in 

personnel damage. 

Precautions for hammer application 

While using the hammer, the operator shall wear safety glasses, safety helmet and 

other protective clothes, and shall pad one copper bar between the hammer and the 

part hammered. 

If use the hammer to hammer the hard parts, such as pin or bearing, note that the 

fragment will fly into and damage eyes.

 

I  Knowledge on Tyre Inflation  

1.1Tyre Inflation with Nitrogen (N2) 

z  SICHUAN CHENGDU CHENGGONG CONSTRUCTION MACHINERY CO.，LTD. 

suggests that all rubber tyres and tyres’ pressure would be inflated and regulated with 

nitrogen respectively. Nitrogen is a kind of inert gas and does not support combustion. 

z  In order to avoid redundant nitrogen in the tyre, proper nitrogen inflation 

equipment shall be used and necessary training on application of the equipment is 

required. Improperly using the equipment may result in blowout of tyre possibly, 

even serious personal injuries and death. 

z  Because the pressure of the cylinder filled with nitrogen is about 15000kPa, 

improperly using the inflation equipment will possibly result in blowout of tyre or 

damage of wheel rim.