Check the lubricant capacity of rear axle .
Low lubricant capacity may cause damages to rear axle
cams or excessive noises .
Clear the brake shoes surface , all the brake shoes shred
dust should be cleaned out in periodic time . Shred dust
may cause mechanical malfunctions of brake .
Use a compressed air to blow the dust out .
Check the brake shoes worn out conditions , if it is
extremely worn out(1/3 left) ,then the brake shoes need
to be replaced with a new one
DO NOT DRIVE THE VEHICLE WITH POOR BRAKE .
Check the bearings inside of front hub , the hubs should
have enough lubricated grease .