Pars ABL GIANT 3.0 Manual page 47

SETTINGS
CENTRE BRUSH PRESSURE
Centre brush is equipped with ABL automatic brush floating system, both cylinders (A)
control the brush pressure, which means that the centre brush always has the right brush
pressure against the ground. Regardless of the wear of the brush, it automatically follows
the bumps in the ground. It extends the life of the centre brush the results and sweep
become more efficient
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