Daedong CK22 - Flow Priority Valve

10-9
DS35-W00 May. 2007
CLUTCHCLUTCH CLUTCHCLUTCH
CLUTCH
TRANSMISSIONTRANSMISSION TRANSMISSIONTRANSMISSION
TRANSMISSION
ENGINEENGINE ENGINEENGINE
ENGINE
HSTHST HSTHST
HST
FRONT AXLEFRONT AXLE FRONT AXLEFRONT AXLE
FRONT AXLE
STEERINGSTEERING STEERINGSTEERING
STEERING
BARKEBARKE BARKEBARKE
BARKE
ELECTRICELECTRIC ELECTRICELECTRIC
ELECTRIC
INDEXINDEX INDEXINDEX
INDEX
HYDRAULICHYDRAULIC HYDRAULICHYDRAULIC
HYDRAULIC
GENERALGENERAL GENERALGENERAL
GENERAL
REAR AXLEREAR AXLE REAR AXLEREAR AXLE
REAR AXLE
CK22/CK22H
B. FLOW CONTROL V/V
This valve is mounted in the hydraulic block power
steering.
The flow control valve consists of flow divider, flow
divider, spool, spring and damper. It is a flow divider
that divides the oil flow from a single hydraulic source
(pump) to actuate two circuits at the same time.
This valve is a 6 priority flow divider in which a con-
trolled flow is fed to the “PF” port and the excessive
flow is fed to the “EF” port. The “PF” port is connected to
the power steering. The “EF” port is connected to joy-
stick v/v or remote hyd. v/v. Vibration is caused by a
change in the oil flow when the engine speed is in-
creased quickly. The damper reduces the vibration of
the spool.
(1) P port (EF) To joystick v/v
(2) Relief valve (PF) To steering
(3) Flow priority valve (P) From the pump
(4) Directional valve (T) To the tank
196W909B
2.4.1 FLOW PRIORITY VALVE
A. STANDARD OIL CIRCUIT
The total flow of oil (29 /min, 7.66 U.S. GPM), pres-
sure-fed from the hydraulic pump, enters into the “IN”
port through the route as shown in diagram.
A portion of oil flow-controlled by the orifice runs to the
power steering and returns to the tank.
On the other hand as the oil passes the orifice, a pres-
sure difference is created between the ends of the
orifice. This causes the spring to deflect causing the
spool to move downward. As a result, the excessive oil
runs into “EF” port and to the control valve.
196W907B
(1) Flow control plug
(2) Flow control spool
(3) Spring
(EF) Excessive flow
(to Joystick v/v or
remote hydraulics)
(PF) Controlled flow
(to power steering)
HYDRAULIC SYSTME - OPERATING PRINCIPLE