5-7
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
2.3 FUNCTIONS OF EACH COMPONENT
2.3.1 HYDRAULIC PUMP
This is an axial piston pump with rotating swash plate
(variable displacement type).
The cylinder block with swash plate is rotated by the
drive shaft. The angle of the swash plate determines
the stroke of the pistons and the oil comes in and out
through the inlet and outlet port in valve plate at every
180°.
By adjusting the angle of the swash plate with trunnion
shaft, the amount of displacement can be changed. In
addition, the displacement direction can be changed
by angle of the swash plate. When changing the dis-
placement direction, the rotational direction of the mo-
tor can be changed (forward and reverse).
2.3.2 HYDRAULIC MOTOR
This is an axial piston motor with fixed swash plate
(fixed displacement type).
The oil pressure from hydraulic pump pushes the pis-
ton against the angled swash plate and therefore the
pistons slide down along with the slant surface. Due to
this, the cylinder block and output shaft assembled
with pistons are rotated. The angle of the swash plate
determines the stroke of the pistons and the oil comes
in and out through the inlet and outlet port in valve plate
at every 180 degree.
196W499B
196W4A1A
(1) Piston (4) Valve plate
(2) Trunnion shaft (5) Cylinder block
(3) Swash plat
(A) Input shaft (C) Outlet port
(B) Inlet port
(1) Piston
(A) Output shaft (C) Outlet port
(B) Inlet port
HST - OPERATING PRINCIPLE
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