Daedong CK22, Руководство по ремонту

Страница: 195 / 372

5-9 DS35-W00 May. 2007
CLUTCHCLUTCHCLUTCHCLUTCHCLUTCH
TRANSMISSIONTRANSMISSIONTRANSMISSIONTRANSMISSIONTRANSMISSION
ENGINEENGINEENGINEENGINEENGINE
HSTHSTHSTHSTHST
FRONT AXLEFRONT AXLEFRONT AXLEFRONT AXLEFRONT AXLE
STEERINGSTEERINGSTEERINGSTEERINGSTEERING
BARKEBARKEBARKEBARKEBARKE
ELECTRICELECTRICELECTRICELECTRICELECTRIC
INDEXINDEXINDEXINDEXINDEX
HYDRAULICHYDRAULICHYDRAULICHYDRAULICHYDRAULIC
GENERALGENERALGENERALGENERALGENERAL
REAR AXLEREAR AXLEREAR AXLEREAR AXLEREAR AXLE
CK22/CK22H
2.3.5 NEUTRAL VALVE
Neutral valve is a valve that secures neutral position
during starting.
When the swash plate’s angle and discharge volume
become smaller, the motor does not rotate because
the oil flows into the inner passage of case (passage
B-drain circuit) via orifice.
(Maintaining neutral width)
As the swash plate’s angle increases, the oil volume
passing the orifice also increases causing high pres-
sure drops in fore and aft of the orifice.
According to pressure differences generated at this
moment, the oil pressure overrides spring force, then
the valve moves toward left by blocking contacts be-
tween passages A and B.
Accordingly, the discharged oil from the pump that was
flowing toward the drain circuit (passage B) flows into
motor causing its rotation.
196W4A3A
(1) Neutral valve ass’y (4) O-ring
(2) O-ring (5) Check
(3) Backup ring (6) Check valve spring
HST - OPERATING PRINCIPLE