CG958H Wheel Loader. Manual - part 32

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3.  Clean the oil filling cap and install it. 

Hydraulic oil 

Examine the oil level. The hydraulic oil box is situated behind the cab and hydraulic oil’s 

level is at left side. 

1.  Keep the oil level at the middle of the oil level gauge; 

2.  If the oil requires to be added, open the oil filling cap to add oil with an oil tube; 

3.  Clean the oil filling cap and install it. 

In oil filling, the dipper shall be leveled on the ground. 

Cooling system 

Examine the level of the coolant. The radiator cap is located in the engine hood behind the 

machine. 

1.  Open the maintenance door on the engine hood; 

2.  Unfasten the radiator cap slowly to release the pressure; 

3.  Keep the level of the coolant within 1cm under the water filter. If the water requires to be 

filled every day, please examine the leakage. 

4.  Examine the sealing of the cap. Any damaged cap shall be replaced; 

5.  Mount the cap and close up the maintenance door. 

Fuel box 

Discharged water and precipitate 

The fuel box is located at back of the machine, and the discharging screw plug is located 

at the right bottom of the fuel box. 

1.  Release the discharging screw plug slowly to discharge the water and precipitate. 

2.  Fasten the discharging screw plug. 

Round examination over machine 

Examine machine 

1.  Examine whether the working device and linkage gear are worn. Any damaged one shall be 

replaced; 

2.  Examine whether bulbs and glass are damaged. Any damaged one shall be replaced; 

3.  Examine and remove the dust and foreign substance on the engine hood; 

4.  Examine leakage of cooling system, hose failure and dust accumulation status. The leakage 

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shall be removed and foreign substance on the radiator shall be got rid of; 

5.  Examine the leakage status of the hydraulic system; examine the oil box, soft and hard tubs, 

screw plug, and joints. Any leakage shall be removed; 

6.  Examine the leakage status of front and rear differential gears, final transmission, and wet 

brake; 

7.  Examine the leakage status of the transmission box; 

8.  Examine damage and pressure of tyres; 

9.  Examine whether the covers and hoods are closed and whether they are damaged; 

10.  Examine ladder, aisle and railing and their cleanness; 

11.  Examine the cleanness of the cab; 

12.  Examine whether the instruments and switches are damaged. Any damaged one shall be 

replaced; 

13.  Examine the rear bumper for optimal vision. 

Cleaning of glass window   

Clean glass windows with common glass cleaner. Open the windows. 

Meters and lamp 

Start the engine to examine whether the meter, meter glass and switch are damaged; 

examine all lamps; blow the electrical horn and turn off the engine. 

9.3 Maintenance of A New Loader after Service for 50 Hours   

Replace the oil of differential gear and final transmission of the front and rear axles 

Maintain according to the following requirements (except otherwise herein provided); 

1.  Disassemble the oil drain plug of front axle and rear axle, and discharge the oil. 

2.  Clean the oil drain plug and reinstall it. 

3.  Disassemble the oil drain plug of front axle and rear axle, and refuel the axle through the 

oil filling port till bleeding. See figures and tables in “the viscosity 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 

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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 in this 

manual’s safety chapter shall be read and understood. 

z  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. 

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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 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”. 

z  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.