CG958G Wheel Loader. Manual - part 34

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and full capacity of oil”. 

4． Install the oil drain plug. Start the engine and let it work for a few minutes. 

Re-check the oil level and refuel to the specified position if necessary. 

5． Install the oil drain plug. 

Working device and hydraulic steering system 

Replacement of hydraulic oil box 

The machine shall be on level ground, set all working devices in the ground and 

exert downward pressure on them. Close the parking brake and shutdown the engine. 

1． Disassemble the oil filling cap of the hydraulic tank. 

2． Open the vent valve at the bottom of the hydraulic tank and discharge the oil. 

3． Close the vent valve. 

4． Replace the filter of hydraulic system. See “Hydraulic System” in “Maintenance 

of Each 500 Working Hours or Every Season”. 

5． Disassemble the fuel strainer, clean it and install it. 

6． Refuel to the hydraulic tank. See “Viscosity and Full Capacity of Oil”. 

7． Check the gasket of the oil filling cap and replace the damaged gasket. 

8． Fit on the oil filling cap. 

9． Start the engine and run it for a few minutes. 

10．  Maintain the hydraulic oil level in the middle of the oil gauge, and if 

necessary, refuel it through the oil filling port. 

11. Shut down the engine.

 

9.4 Maintenance of Each 50 Working Hours or Every Week   

 

Prior to carrying out any operation or maintenance, the warnings and annotations 

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in this manual’s safety chapter shall be read and understood. 

 Firstly carry on the aforementioned examination items 

Lower hinge pin of dipper 

Lubricate the hinge pin 

Lubricate two hinge pins under the dipper. 

9.5 Maintenance of Each 100 Working Hours or Every Two Weeks 

Prior to carrying out any operation or maintenance, the warnings and 

annotations in this manual’s safety chapter shall be read and understood. 

Replacement of transmission fluid 

After working for 100 hours, the transmission fluid of the new loader shall be 

replaced. 

Start the engine to hear the oil and the machine shall be set at a level position. 

Set down the bucket and exert downward pressure on it slightly. 

Close the parking brake and shutdown the engine. 

1．Disassemble the oil drain plug at the bottom shell of the gearbox to discharge the 

oil, clean and fit on the oil plug. 

2．Disassemble the oil drain plug which locates below the torque-converter’s oil 

radiator at the backmost of the machine and discharge the oil. Clean and fit on the 

oil plug. 

3．Replace filter. 

4．Fill up oil with special volume into the torque-converter and fill to the high 

position of the oil gauge when the machine is offstate. 

5．Start engine and pedal the service brake. 

6．Under the idle speed, slowly manipulate the joystick of the gearbox, and recycle 

the oil so that oil torque-converter and pipeline may be full of oil. Check the oil 

level of the torque-converter which shall between the low and high level of the oil 

gauge. 

7．Set the joystick of gearbox at stop short, shutdown the engine and park it well. 

After it is replaced the machine works for 1000 hours later, the transmission fluid 

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shall be replaced once each 1000 hours. If the machine does not work for 1000 

hours every year, the transmission fluid shall be replaced one time. 

Specific see “Instructions of 4WG200 Power Shift Gearbox”. 

 Firstly carry on the aforementioned 

examination items 

Oscillating frame of rear axle 

Lubricate the two lubricating joints of the 

oscillating frame of the rear axle. 

Hinge pin of hydraulic oil cylinder and tie bar 

Lubricate 11 hinging joints of the working device 

(excluding two hinge pins of the dipper). 

Steering cylinder’s hinge pin 

Lubricate 4 bearings of the left and right steering cylinders. 

Articulated bearing of front and rear frames 

 
Inject lubricant 

Lubricate the upper and lower articulated bearings of the front and rear frames. 

  Air conditioning System 

1． For the integral air conditioning system, do not dismantle it randomly so as to 

prevent the condensator from leakage. Examine it regularly; especially examine 

whether the pipe joints are loosened and whether the collecting screws are 

loosened. For any problem, the corresponding measures shall be taken. 

2． Regularly examine the belt for proper tightness. Usually, after working for 100 

hours, it shall be examined one time. Please see the “Regulation of Belt” in the 

chapter of “Air Conditioning” for details.   

3． Regularly clean the dust on the surface of condenser. It may be cleaned with 

water or high-pressure air blower to prevent weakening the condensation effect. 

Usually, after working for 100 hours, it shall be cleaned one time. Spray rinsing 

with steam is not allowed. 

4． While removing the system refrigerant, discharge it slowly to avoid randomly 

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discharging of the antifreezing oil. Keep it away from skin. 

5． While replacing the parts, add the antifreezing oil according to the requirements. 

6． The expansion valve has been adjusted well according to the relevant regulations. 

Do not adjust it without authorization. 

9.6 Maintenance of Each 250 Working Hours or Every Month 

Prior to carrying out any operation or maintenance, the warnings and 

annotations in this manual’s safety chapter shall be read and understood. 

 Firstly carry on the aforementioned examination items 

Engine oil and filter 

Replace engine oil and filter 

1． Disassemble the oil drain plug of crankcase, discharge oil, clean the plug and 

install it. 

2． Open the machine’s left maintenance door, disassemble the filter with a zonary 

wrench. 

3． Clean the filter’s shell base, remove all old filter gaskets. 

4． Smear new filter gasket with a thin layer of engine lubricant.   

5． Install new filter by hand, tighten it for semi-circle when the gasket touch the 

base. 

6． Disassemble the oil filling cap, and add fresh oil into the crankcase. See also 

“Viscosity and Full Capacity of Operation Oil”. Clean the oil filling cap and 

install it. 

7． Start the engine to heat oil, detect leakage, and shutdown the engine. 

8． Maintain the engine oil in the normal position of oil gauge. 

9． Install the maintenance door. 

Braking system 

Test the braking capacity of the service brake. 

There shall not have any people and obstacles around the machine. 

Fixed link of the front and rear frames shall be packed up.   

Test the brake on dry road.