Toro Groundsmaster 4000-D Service Manual page 56

Problem
Front cutting unit drops too fast or
too slow.
Cutting units will not lower.
Hydraulic System (Rev. B)
Possible Causes
Flow control valve is not adjusted properly.
Lift arm pivots are binding.
Lift cylinder is damaged.
Counterbalance pressure is excessive.
Lift/lower control valve is worn or damaged.
Pilot valve in lift/lower manifold is damaged or sticking.
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