10-20
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
a
A
B. NEUTRAL
Neutral: The hydraulic fluid passed through the auxil-
iary double acting valve is supplied to the middle sec-
tion (A) of the MLS valve and then flows into the valve
through the brass orifice (a) and the (b) port.
•
The diameter of the brass orifice differs depending
on the horse power of the tractor.
The hydraulic fluid supplied to the MLS valve through
the (a) and (b) ports is drained and the fluid in the
hydraulic lift cylinder remains by the check valve (3).
Therefore, the 3-point hitch can maintain its position
even when the load is applied to it.
The hydraulic fluid is supplied to the (b) port and its
pressure rises since the fluid passage is blocked by
the control spool (1). Then, the fluid is supplied to the
top of the regulator piston through the hole (c). When
the regulator piston is pushed down by this fluid, the
drain hole (f) opens simultaneously to drain the fluid.
The hydraulic fluid supplied through the brass orifice
(a) flows through the passage (d) formed by the pilot
valve (12). When the pilot valve is pushed up by this
fluid, the fluid is drained simultaneously. As the pilot
valve opens, the passage (e) opens and the fluid un-
der the regulator piston is drained so that the regulator
piston can be moved downward easily.
T46WA29A
(1) Control spool
(2) Regulator piston
(3) Check valve
(4) Discharge valve
(5) Safety valve
(6) Drain hole
(7) Cylinder duct
(8) Upper chamber
(9) Spring
(10) Lift cylinder
(11) Upper chamber
(pilot valve)
(12) Pilot valve
(13) Pilot drain hole
(14) Steel ball plug
T46WA30A
7
5
9
84
7
3
12
14
11
1
13
2
6
14
9
e
c
f
b
a
d
HYDRAULIC SYSTME - OPERATING PRINCIPLE
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