SDLG LG936, Руководство по эксплуатации и техническому обслуживанию

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Operation & Maintenance Manual ── LG936 Wheel Loader
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stepped, but the power of gearbox is not cut off.
Release the brake pedal, the compressed air of booster pump bleeds from brake valve to atmosphere
and the brake state is terminated.
3.2 Emergency and Parking Brake System
This system employs the electronic control air driving caliper disk brake type brake system and the
electronic control air driving inner expand hoof type brake system. During running, when the air
pressure of brake system is normal , gently rotate the operation button of the brake electromagnetic
valve , the button will rebound later automatically, the compressed air of air tank flows through
brake electromagnetic valve into the parking brake air room , pushing the spring to open the piston,
release the disk brake to release braking status; when stopping or emergency braking, push the
operation button of brake electromagnetic valve, the compressed air in brake air room will be
drained to the environment through the air drain outlet of brake electromagnetic valve, the brake unit
will be pulled up due to the spring force to brake the machine, and at the meanwhile, air pressure
signal will be send and the break indicator lamp will be ON and the power of gearbox is cut off.
When the system pressure is lower than 0.4MPa, the brake electromagnetic valve will power off
automatically, so that to achieve emergency brake, so that the compressed air in parking brake air
room will be drained to the environment through manual control brake valve to achieve emergency
brake, to ensure the safety of machine and the people.
4 Steering System
The machine adopts fully hydraulic articulated steering system.
The steering system consists of steering pump, load sensing fully hydraulic steering machine ,priorty
valve, steering cylinder, hydraulic oil radiator, hydraulic oil tank, oil lines and the attachments, as
shown in Fig.5-6. The steering hydraulic system is of independent load sensing type. When the
machine turning, the system provides oil to the steering system in priority, and then the remained oil
with steering returns oil tank through radiator. Safety valve is located on priority valve, with set
pressure for the system is 12MPa.