Operation & Maintenance Manual
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LG968 /969Wheel Loader
99
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 cracking.
z
Check whether the front and rear axles, engine and gearbox and frame are loosening.
z
Check the tires pressure. Inflation pressure of front tires should be 0.333
～
0.353MPa while that
of rear tires is 0.275
～
0.294MPa.
z
Open the water drain valve in the air tank to drain the water.
In addition, do the extra maintenance in the first 250 hours as follow:
z
Check and clean the air vent of gearbox. Clean the oil pan 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
Replace the gear oil of front and rear axle.
z
Check if there is leakage in the brake system. Clean the filter mesh of oil bowl in the booster
pump. Clean the air vent and check the brake fluid. Add if deficient and replace 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 wearing condition of brake discs and friction discs. Replace if necessary.
z
Clean the silencer of braking electromagnetic valve.
In addition, do the extra maintenance in the first 500 hours as follow:
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 of hydraulic reservoir. Check the quantity and
cleanness of hydraulic oil. Filter if possible, add if deficient and replace if necessary.
z
Check if there is leakage in the brake system. Clean the filter mesh of oil bowl in the booster
pump. Clean the air vent and replace the brake fluid.
3.5 Every 1000 Hours (Half an 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
