HYDRAULIC SYSTEM
6-15
D569-W02 May-2003
c. Discharge Phase
During this phases the control valve supplies at the
same time the oil coming from the pump and the oil
contained in the cylinder to the discharge causing the
lowering of the arms.
The control spool (1) is in such a position to connect
chamber (15) directly to the discharge through hole (16).
The oil coming from the pump, as in the neutral phase,
is able to move downward the small regulator piston (2)
and to flow to the discharge through holes (17).
At the same time the oil contained in the cylinder cham-
ber (23) flows from annular duct (18) to the lowering
regulator (8) and through hole (24) it enters the dis-
charge valve (4), flowing to the discharge from the hole
(25) therefore causing the lowering of arms.
In this phases the lowering speed of the implement is
controlled automatically by the lowering regulator (8)
that is sensible to the dynamic force of the discharge
oil, consequently modifying the throat that keeping con-
stant, into acceptable limits, the lowering speed even
if the cylinder pressure varies.
569W612A
(1) Control Spool
(2) Regulator Piston
(4) Exhaust Valve
(8) Regulator
(15) Chamber
(16) Exhaust Hole
(17) Hole
(18) Annular Duct
(23) Cylinder Chamber
(24) Hole
(25) Hole
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Summary of Contents for 8454
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Page 9: ...CHAPTER 1 GENERAL INFORMATION www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 23: ...CHAPTER 2 ENGINE www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 91: ...CHAPTER 3 CLUTCH www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 105: ...CHAPTER 4 TRANSMISSION SYSTEM www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 175: ...CHAPTER 5 FRONT AXLE www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
Page 176: ...www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
Page 195: ...CHAPTER 6 HYDRAULIC SYSTEM www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 281: ...CHAPTER 7 BRAKE www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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Page 299: ...CHAPTER 8 ELECTRIC SYSTEM www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
Page 300: ...www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
Page 315: ...CHAPTER 9 CABIN SYSTEM www mymowerparts com K T Saw Shop 606 678 9623 or 606 561 4983 ...
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