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CG958G Wheel Loader. Manual - part 35

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The following tests are used to determine whether the service brake functions are

normal or not, not to measure the maximum braking force. The vehicle braking force

needed by the engine running at a certain speed is adapted with the setting value of the

engine and the efficiency of the driving system, as well as the braking capacity of the

brake.

When the machine begins moving, the revolving speed of the engine when

braking, the service brake shall be compared with that of the engine as braking stopper

is under the original test, and shall be a system wear symbol.

1． Start the engine, slightly raise the bucket, brake the service brake, and release the

parking brake.

2． When braking the service brake, put forward the gearshift at the second gear.

3． Gradually increase the revolving speed of the engine to high speed idle, and the

machine shall not move.

Warning

When the machine begins moving, immediately reduce the revolving speed

and close up the parking brake.

4． Let the revolving speed of the engine drop to low speed idle, set the gearshift to

stop short, close up the parking brake, put the bucket on the ground, and shutdown

the engine.

Caution

If the machine still moves when tasting the service brake, please connect

with related service station and allow serviceman to check the machine. If

necessary, the service brake shall be repaired before reuse of the machine.

Test the braking capacity of the parking brake.

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

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

Carry on the test on dry cement road which slant angle is about 8 degree and the

length of the slope is about 20 meters.

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The following tests are used to determine whether the service brake functions are

normal or not, not to measure the maximum braking force.

1． Start the engine, and raise the bucket to the transport position (40 centimeters

above the ground).

2． Drive the machine to the center of the slope, tramp the service braking pedal to

stop the machine (do not loosen the pedal at this time).

3． Set the gearshift to the stop short and close up the parking brake.

4． Loosen the service braking pedal (shall not turn off the engine), observe whether

the machine moves down or not. At this point in time, if the machine doesn’t

move in five minutes, the parking brake is normal.

Warning

If the machine moves, immediately tramp the service braking pedal to stop

the machine and quickly drive it off the slope.

Caution

If the machine still moves when testing the parking brake, please connect

with related service station and allow serviceman to check the machine. If

necessary, the parking brake shall be repaired or adjusted before re-use the

machine.

Cooling system

Add coolant additive.

Caution

Do not add additive randomly before reading and understanding the content

of the chapter “Cooling System Specification”.

The maintenance door of the radiator cap is located on the top of the aft closure

of the machine.

1． Open the maintenance gate.

2． Slowly unscrew the radiator cap and release pressure.

3． Add 0.25L coolant.

4． Fit on the radiator cap and close the maintenance gate.

Splines of propeller shaft

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Lubricant splines

1． Disassemble the fixed link of the front and rear frames and start the engine.

2． Turn the machine right or left to the limit position.

3． Put the bucket on the ground, close up the parking brake, and shutdown the

engine.

4． Lubricate the hinged splines of propeller shaft.

Air-conditioning

Service test - adjusting belt

1． Start the engine and allow it run at high speed idle.

2． Set the controlled switch of the air-conditioning at the largest refrigeration

position and the switch of air volume at high position.

3． Wait two minutes for the stability of the air-conditioning system.

4． Check the refrigerants of the system by the following methods: touch the

low-voltage tube and high-voltage tube by hand. If there has any refrigerant in the

system, the high-voltage tube shall be hotter than the low-voltage tube. If there

has no refrigerant or few, the air-conditioning system will stop working.

5． Shut down the engine and check the compressor belt.

6． Check the work and adjust the compressor belt. The belt shall lop to 14~20mm

under a power of 110 Newton.

7． Screw the adjustable nut till it gets the correct belt tension and tighten the nut to

150±20N.m.

8． Re-examine the regulation of the belt.

9． Repeat the 1~3 steps.

10． If the refrigeration is poor, shut down the air-conditioning and the engine.

Connect with the service station for the maintenance of the air-conditioning if

necessary.

Additional Maintenance Contents for the First 200 Hours after Usage

of New Loader Are Given below

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Front Axle and Rear Axle

Check the cleanliness of the oil and replace it if it is dirty.

See the steps in “‘Front axle and rear axle’ in the maintenance of 50 hours

running-in of new loader”.

Working device and hydraulic steering system

Check the cleanliness of the oil and replace it if it is dirty.

To see the steps in “‘Working device and hydraulic steering system’ in the

maintenance of the running-in 50 hours of new loader”.

9.7 Maintenance of Each 500 Working Hours or Every Season

Firstly carry on the aforementioned examination items

Firstly carry on the aforementioned items.

Before carrying out any operation or maintenance, the warnings and annotations

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

Crankcase scavenging valve of engine

Clean scavenging valve

Carry on cleanup according to the service manual of diesel engine.

Hydraulic system

Replace filter.

1． Disassemble the oil filling cap, and release the pressure inside the gasoline tank.

2． Loosen the fixed bolts of the filters.

3． Disassemble the lid and filter element.

4． Discard the filter element.

5． Check the O-Ring and it shall be replaced if necessary.

6． Install new filter element and lid, and tighten the fixed bolts of the lid.

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

refuel it through the oil filling port.

8． Check the seal of the lid of oil filling port, replace the gasket if it is damaged, and

install the lid of oil filling port.

Fuel oil system

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