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If the hydraulic oil has been seriously polluted, in addition to drain out the hydraulic oil from
the hydraulic tank, heat radiator of hydraulic oil, boom cylinder, bucket cylinder with the above
mentioned method, open the end with a pipe, to drain out hydraulic oil in the cylinder and inner
cavity of various pipes. Then fill the clean hydraulic oil to the upper level of the oil level scale.
5.14 MAINTENANCE OF SERVICE BRAKE SYSTEM
Frequent and proper maintenance of the service brake system plays an important role in ensuring
braking performance and improving traffic safety.
Regularly check the system for leaks and various joints and connections for looseness, without
any leak from the gas path system and without any seepage from the grease system. When the
brake pads are worn to 2/3, please replace them in a timely manner.
Brake fluid shall be 719 high-temperature resistance synthetic brake fluid, and if replacement is
needed, plant-based brake fluid is only allowed. Moreover, after the original brake fluid is
removed thoroughly, new grade of brake fluid must be injected, and when the brake fluid level is
insufficient, replenishment shall be made immediately. For each filling, use a filter bowl, with the
liquid level up to 20 ~ 25mm from the filler inlet. Brake fluid shall not be mixed with mineral oil and
water, and otherwise it will quickly cause damage to rubber components of the system and
reduce the braking effect.
The gas in the grease system may affect the braking performance, and after replacement of parts
and repair, exhaust shall be carried out as follows:
1. Clear the oil system piping, oil storage chamber, filler inlet and deflation location of the sludge and
fouling;
2. Fill the brake fluid as required;
3. Start the power machine, and stop it until the pressure reaches 0.67-0.69MPa;
4. Put a transparent plastic tube over the gas nozzle, with the other end of the tube in the oil holder;
5. Depress the brake pedal several times continuously, then step on the brake pedal tightly, and loosen
the discharge nozzle on the upper end of the front and rear disc brakes for exhaust until no bubbles
are discharged from the liquid column; screw in the discharge nozzle, loosen the brake pedal, and
during deflation, fill the brake oil cup with brake fluid without delay to prevent air from entering the
system again;
6. After deflation, while there is pressure in the gas tank, open the drain valve on the tank bottom and
release liquid. Otherwise, the tank is susceptible to rust due to uncleanness, thus affecting the
service life of rubber components of the gas system.
During use, a user shall, in terms of the gas tank, give care to the following:
Warning
