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LG956 Wheel Loader. Manual - part 28

Operation & Maintenance Manual──LG956L Wheel Loader

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2.3 The Sketch of Lubricating Points

2.4 Detailed Rules of Electric System Maintenance

z If the wire stays in the wet environment or the insulation of it is damaged, the electric system

may leakage which will cause hazardous accident.

z Maintenance of components related to the electric system.

1) Check the tension and distress of the fan belt.

2) Check the fluid level of electrolyte in the storage battery.

z Never remove or disassemble any electric components installed in the machine.

z Never install any electric components other than those specified by the company.

z Be sure to keep the electric system dry when washing the machine or working in rain and snow.

z Avoid the electric system corroding by seawater when working on the seashore.

2.5 Maintenance Tools

Refer to the production containerization list for details of maintenance tools.

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2.6 Tightening Torque of Screw

The tightening torques of screw connection of the important parts are listed in the table below. Abide

by this table except in special conditions.

No. Position

Specification

Material or

character

class

Torque(N.m)

Fixing bolts of transmission base

M18×40 8.8

240～280

Middle cover bolts of transmission box

M14×35 8.8

125～165

Nuts with groove at both output ends of
transmission box

M33×1.5 8

320～400

Connect bolts between rim and brake plate

M20×1.5×50 8.8 280～380

Connect bolts of main driving left and right
differential cover

M16×1.5×150 40Cr 280～330

Connect bolts between main driven move
helical gear and right cover of differential

M16×1.5×55 40Cr 280～330

Connect bolts between main driving bearing
chock and bracket

M22×100 10.9

500~600

Lock bolts of main driving input flange

M33×1.5 8

320～400

Connect bolts between plane frame
assembly and rim

M20×1.5 10

500~580

Connection between the bracket of main
driving and axle shell

M16×1.5×45 8.8 193~257

11 Rim

nuts

M20×1.5 8

480~580

Connect bolts between brake clip assembly
and stent

M20×1.5×56 10.9 376~502

Assembly of driving axle and frame

M30×2×100 8.8 650~80

Connection of transmission shaft

M14×1.5×45 8.8 124~165

Connection of engine oil tank, fuel tank and
frame

M16×25 8.8

195~255

Connection of dipper teeth and bucket

M24×65

M24×90

45 370~450

3 CONTENT OF MAINTENANCE

Maintenance content includes the run-in period of a new machine and the periodic maintenance of

every 10, 50, 250, 500, 1000 and 2000 hours.

3.1 Every 10 Hours (Days) Service

z Check the sealing performance of work equipment systems such as hydraulic, steering and brake

system.

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z Check the flexibility and reliability of the brakes.

z Check whether the electric circuit is correct and the electric components are normal.

z Check the oil level in the oil tank and the water level in the water tank.

z Add grease to the fan shaft, jointed point between front and rear frames, driving axles, jointed

points of oscillating frame and joint points of work equipment.

z Check if there are other abnormalities.

z Refer to Operation and Maintenance Manual of diesel engine for maintenance.

3.2 Every 50 Hours (Week) Service

Carry out the periodic maintenance of every 10 hours with this maintenance operation at the same

time.
z  Check oil level of the gearbox, hydraulic oil tank and brake booster pump.
z  Tighten all connection bolts of transmission axles.
z  Check whether all connection bolts of hubs and the brake caliper are loose.
z  Check all connection bolts of teeth for tightening.
z  Check and lubricate the accelerator control, parking brake and gearshift control system.

In addition, do the extra maintenance in the first 50 hours as follows:
z Check and clean the air vent of the gearbox. Check the filter cartridge of the oil line system of the

torque converter-gearbox.

z Check if there is leakage in the hydraulic system. Check and clean the air vent of the hydraulic

reservoir. Check and clean the oil-return filter cartridge of the hydraulic reservoir.

z Check if there is leakage in the brake system. Clean the filter mesh of the oil bowl in the booster

pump. Clean the air vent and check the brake fluid. Add them if deficient.

3.3 Every 250 Hours (Month) Service

Carry out the periodic maintenance of every 10 and 50 hours with this maintenance operation at the

same time.

z Check the storage battery. Clean surface and terminals of the battery then coat Vaseline lamina.

z Check whether assembling bolts of frames are loose and welding seams are cracked.

z Check whether the front and rear axles, engine and gearbox and frame are loose.

z Check the tire pressure. Inflation pressure of front tires should be (0.39±0.01)MPa while that of

rear tires should be (0.33±0.01)MPa.

z Open the water draining valve in the air tank to drain the water out.

In addition, do the extra maintenance in the first 250 hours as follows:

z Check and clean the air vent of gearbox. Clean the oil pan of gearbox. Replace the suction filter

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cartridge in the oil pan of gearbox. Replace the filter cartridge in the oil lines of torque

converter-gearbox. Replace the gearbox oil.

z Replace the gear oil in the front and rear axles.

z Check if there is leakage in the brake system. Clean the filter mesh of the oil bowl in the booster

pump. Clean the air vent and check the brake fluid. Add them if deficient and replace them if

necessary.

3.4 Every 500 Hours (Season) Service

Carry out the periodic maintenance of every 10, 50 and 250 hours with this maintenance operation at

the same time.
z  Check and adjust the clearance of hand brake system.
z  Check the wear condition of brake discs and friction discs. Replace them if necessary.
z  Clean the silencer of the braking electromagnetic valve.

In addition, do the extra maintenance in the first 500 hours as follows:

z Check if there is leakage in the hydraulic system. Check and clean the air vent of hydraulic

reservoir. Replace the oil-return filter cartridge and pilot filter of hydraulic reservoir. Check the

quantity and cleanness of hydraulic oil. Filter the oil if possible. Add them if deficient and replace

them if necessary.

z Check if there is leakage in the brake system. Clean the filter mesh of the oil bowl in the booster

pump. Clean the air vent and replace the brake fluid.

3.5 Every 1000 Hours (Half a Year) Service

Carry out the periodic maintenance of every 10, 50, 250 and 500 hours with this maintenance

operation at the same time.

z Clean the oil pan of gearbox. Clean the air vent of gearbox. Replace the suction filter cartridge in

the oil pan of gearbox. Replace the filter cartridge in the oil lines of torque converter-gearbox.

Replace the gearbox oil.

z Change the gear oil in the front and rear axles.

z Replace the antifreeze (replace once every 1000 hours or 1 year, choose according to which

comes earlier).

z Check and clean the filter of the reinforcing pump oil storage cup, and clean the air vent to

replace the brake fluid.

z Check if there is leakage in the hydraulic system. Check and clean the air vent of hydraulic

reservoir. Clean the hydraulic reservoir. Replace the oil-return filter cartridge and pilot filter of

hydraulic reservoir.

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