Holding the adjusting nut with a 13 mm wrench, use a wrench of the same size to loosen the lock nut only partially.
Holding the end of the cable with pliers, use a 13 mm wrench to turn the adjusting nut clockwise, tightening the cables until the rear wheels become difficult to turn.
After this, we unscrew the nut until the rear wheels begin to rotate freely.
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The cable tension can be easily adjusted using a high ratchet head and extension. In this case, we do not completely unscrew the lock nut, but, having aligned its edges with the edges of the adjusting nut, we put on a high head on "13" and rotate both nuts at once.
We check the adjustment of the parking brake - when the lever is fully moved, 7-9 teeth of the ratchet device should not rotate the rear wheels, and when the lever is lowered, the suspended wheels should rotate freely. We fix it with a lock nut
adjusting nut. If necessary, repeat the adjustment. If it is impossible to adjust the parking brake, you need to check the condition of the rear wheel brake mechanisms and, if necessary, replace the pads, drums and parking brake drive cables.