Branson 4015r User Manual

6
-
20
42hW-201601
CHAPTER 6 HYDRAULIC SYSTEM 3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
4.5 REAR SCV VALVE
PTO VALVE
PST VALVE
*
3
*
64
3&
&/
/%5
'
7


2
3
1
F42W630A
PTO ON
When the PTO switch is set the ON position by the
driver, the magnet of the electric solenoid is activated
to pull the spool in the left direction as shown in the
circuit diagram. Then, hydraulic oil is passed through
the solenoid spool (1) and is supplied to the piston of
the PTO clutch through the port CL. There is a Ø1.3
mm orifice before the solenoid spool. Therefore, at
the initial valve opening state, more hydraulic oil is
applied to the sequence valve (2) than the PTO piston
so that the amount of opening of the sequence valve is
large for smooth initial engagement of the PTO clutch
and reduction of shock. After a certain period of time,
hydraulic oil of 16 kgf/cm
2
is delivered to the piston to
achieve the maximum level of the delivered torque of
the PTO clutch.
The DRV valve (3) is connected in the middle of
the port PC line in which pressure is applied for
the piston when the PTO is activated. This valve
delays engagement of the PTO clutch to reduce
engagement shock. It discharges hydraulic oil from
the port CL to delay the PTO engagement initially
right after the PTO engagement is activated. Then,
after several seconds, this valve is closed to achieve
the maximum level of torque that the PTO clutch
delivers.
The rear SCV valve is installed to the rear section
of the tractor and receives hydraulic oil at a high
pressure through the carryover operation.
A42W647A
F series-au: 4 POrTs sTaNdard,
15 series-us: 4 POrTs OPTiONal
35HW601A
F series-eu: 2 POrTs sTaNdard

Branson 4015r Specifications

General

Brand	Branson
Model	4015r
Category	Tractor
Language	English