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Question:

Roller brake lock why

Roller brake lock why

Answer:

5, the wear plate gap is too small;6 、 the vacuum booster often fails to the valve.
3, wear plate return tension spring failure;4, the brake master cylinder push rod to adjust properly, there is no freedom of travel (four wheel lock);
1, brake master cylinder piston back (four wheel lock);2, brake pump piston back;

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