CG938H Wheel Loader. Manual - part 12

 

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Please note: if the vehicle continues to run at a high speed, overheat of tires will likely to result 

in their explosion. 

z  When adjusting the pressure, keep away from the tire as far as possible and must stand at back 

of the tread. 

z  Combustible gas is forbidden to inflate. Dry nitrogen is recommended. Nitrogen can decrease 

potential explosion hazard, because it does not support combustion and can prevent rubber from 

oxidation or deterioration and tire rim from erosion. 

z  In order to avoid over-inflation, proper tools for nitrogen inflation and related training on use of 

such tools are necessary. 

z  Check of tires and rims shall be done every day. It is prohibited to operation under low pressure. 

Check for presence on the tires such phenomenon as cracks or blisters. 

z  Checking whether any connecting bolt or nut of tire rim is missing and whether the twisting 

moment of connecting nut of the rim complies with the value recommended by manufacturer. 

z  When checking tire, do not enter into places in front of or at back of the roll of tire and shall 

stand at the side of the tire. If a tire needs to be removed or disassembled, other tires must be 

fixed in place by wedges. 

z  When welding operation is conducted near a tire, must be careful because an explosion of the 

tire is possible to occur. 

z  Since repair of a tire or a rim is very dangerous, only trained professionals can undertake the 

repair, using specialized tools and following correct procedures. 

z  When replacing a tire, the specification of new tire shall be that as specified so as to ensure the 

sizes and tread patterns of all tires are uniform. 

Whenever it is avoidable, do not enter into the range showed in the drawing below.

 

8.14 Notices on Tire Storage 

z  As a basic rule, tires shall be stored in a warehouse where any one can not enter into without 

At least 500m 

At least 15m 

 

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permission. If storaging tires outdoors, set up fences around the tires and hang a label of “No 

entrance”. 

z  Since moisture can quicken oxidation of rubber and dirt or oil can corrode tires, the storage 

place of tires shall be dry and clean. When storing tires, light, heat and air circulation shall be 

avoided and the tires shall be covered by canvas, plastic clothing or other duster. Incorrect 

storage practice will adversely affect quality and service lifes of tires. 

z  The tires shall be placed on level ground vertically and be chocked firmly by wedge blocks so 

that unapproved touch will not make them fall down. If they are placed horizontally, the tires 

will be pressed flattened and their quality deteriorated. At least once of rotation (of 90°) shall be 

made for each tire. 

z 

When tires are falling down, get away quickly. Tires of construction machinery are very heavy, 

severe injuries may be caused if attempting to hold it. 

 

8.15 Waste 

    In order to prevent pollution, especially at the living places of human and animals, the following 

procedures must be followed. 

z  No pouring the waste oil into the sewer and river etc. 

z  Place the oil discharged from the machine in a container, not directly discharge it to the 

ground.  

z  In processing of harmful substances such as lubricant, coolant, solvent, filter, accumulator and 

others, the local laws and regulation shall be observed. 

The waste tyres replaced shall be placed at an assigned safe place or recycled. Do not discard them 

randomly.

 

 

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IX. Safe Transportation

 

9.1 Loading and Unloading of Loader 

z  Danger always exitsts in loading and unloading of 

loader, which should be conducted very carefully. 

When loading and unloading, loader engine 

should be running at a low rpm, and loader should 

be traveling at a low speed. 

z  Loading and unloading must be conducted on firm and level ground with safe distance from roadsides being 

properly kept. 

z  Tires of carrying vehicle must be fixed during loading and unloading of loader to ensure that carrying vehicle 

will not move. Cushion blocks should be placed under gangboards. 

z  Gangboards used must have adequate strength with sufficient width and length to provide a safe slope for 

loading and unloading. The angle between gangboards and the ground should not exceed 15º, while spacing 

between gangboards should be adapted to wheel track of loader. 

z  Make sure that gangboards are firmly positioned with the same height on both sides. 

z  Make sure that gangboard surfaces are clean and free of lubricant, oil stain, ice and loose materials. Clean 

loader tires to remove dirt if any. 

z  Never steer a loader on gangboards. If necessary, reverse the loader to get off gangboards, and then adjust 

direction before driving onto gangboards. 

z  After the loader gets onboard, lock its steering mechanism and wedge the tires, then tie down the loader with 

ropes. 

9.2 Road Transportation 

z  In case the loader is towed by a trailer, provisions in national and local laws on weight, height, width and 

length must be observed. All related traffic regulations should be observed as well. 

z  Weight, height, width and length of loader should be taken into consideration when deciding transportation 

route. 

z  When passing bridges or constructions on a private premise, first check to see if whether such bridge or 

construction has an adequate strength to carry the weight of loader. When running on public roads, all related 

provisions must be understood and observed. Height of passages on transportation route should be surveyed to 

see whether the height is sufficient for a cabbed loader to go through. 

 

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z  When other means of transportation are to be used, the loader may need to be disassembled. Please contact 

Chengdu Chenggong Construction Machinery Co., Ltd. Sichuan or authorized dealers for details. 

z  Slippage of loader in transportation or transfer should be avoided. Ice or other slippery substances on dock or 

train wagon must be cleared. 

9.3 Running 

Consult tire supplier on pressure and speed limit of 

tires. 

Inflate tires to a proper pressure value. 

Use a self holding inflating nozzle and always stand 

aside when inflating a tire. Refer to instructions on 

“Tire Inflation”. 

Add engine coolant, engine oil and gearbox oil to a proper level. 

Running of loader is subject to inspection by competent officials for approval if necessary. 

The loader should be running at a medium speed, and attention should be paid to all speed limit 

signs when running. 

Always carry out in-process inspection and check liquid levels in all parts. 

9.4 Lifting 

Lifting instruction is only applicable to short-time lifting of loader in short distance during the shipment of loader. 

Do not lift the loader for a long time when maintaining or servicing the loader, otherwise accident may occur to 

cause personal injury and death. 

 

CAUTION 

Incorrect lifting may cause deviation of the loader and 

lead to personal injury or death and other losses. 

1. Weight and instructions given below only apply to 

CG938H wheel loader manufactured by Chenggong. 

Weight of CG938H is 18400kg. 

2. Crane beam should be long enough to avoid contact with the loader. 

3. Holes in front and rear frames (two holes each) designed for lifting should be used. 

Tie down the loader in different positions and wedge all tires. 

Holes for hooks