Daedong Kioti LK30, Руководство по ремонту

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8-10 SS41-W00 May. 2007
LK30
CLUTCHCLUTCHCLUTCHCLUTCHCLUTCH
ENGINEENGINEENGINEENGINEENGINE
TRANSMISSIONTRANSMISSIONTRANSMISSIONTRANSMISSIONTRANSMISSION
FRONT AXLEFRONT AXLEFRONT AXLEFRONT AXLEFRONT AXLE
STEERINGSTEERINGSTEERINGSTEERINGSTEERING
BARKEBARKEBARKEBARKEBARKE
ELECTRICELECTRICELECTRICELECTRICELECTRIC
INDEXINDEXINDEXINDEXINDEX
HYDRAULICHYDRAULICHYDRAULICHYDRAULICHYDRAULIC
GENERALGENERALGENERALGENERALGENERAL
REAR AXLEREAR AXLEREAR AXLEREAR AXLEREAR AXLE
2.6 POWER STEERING UNIT
Item
Power steering unit
volume
Relief pressure
Factory spec.
12.7 cc/rev
11.8 Mpa
120 kgf/cm 2
1711.44 psi
2.6.1 POWER STEERING UNIT SPEC.
2.6.2 STRUCTURE AND OPERATION
The power steering system described in this Section
is standard equipment for all model tractors. The power
steering is a fully hydraulic system.
The power steering system consists of a power steer-
ing control motor, pump, cylinder assembly, and hoses.
A. POWER STEERING CONTROL MOTOR
Spool and sleeve
1. The spool and sleeve constitute the rotary valve for
selectively changing the fluid passage as well as
direction of the pressurized fluid flow. There are
three forms of fluid passage, the first is for the NEU-
TRAL State the second is for RIGHT TURNING, and
the third is for LEFT TURNING.
2. The spool is fitted to be rotatable within the sleeve,
which is similarly fitted into the bore of the valve
body. The spool and sleeve are mechanically
interconnected.
3. Leaf springs, extend through the spool and sleeve,
and urge the spool to take the indicated position
relative to the sleeve.
This position corresponds to the NEUTRAL state,
and persists as long as the steering handwheel is
at its center position, for straight ahead driving.
4. A diametrically extended pin is loosely fitted to the
drive shaft at the center and to the sleeve, there
being some clearance between the pin and the ra-
dial holes in the spool. When the drive shaft, spool,
and sleeve are in the indicated positions, the sleeve
and shaft are capable of as much as 10° in either
direction (CW or CCW) relative to the spool. By this
angular displacement, the fluid passage for RIGHT
turning of LEFT turning is introduced.
265W805A
B. DRIVE SHAFT
1. The Pump drive shaft, is slightly tilted off the spool
axis, and is splined into the pump gear of the
GEROTOR pump assembly by its bottom end. As
mentioned earlier, this shaft is connected to the pin,
by its top end.
2. In the event of loss of fluid pressure, turning the
steering wheel turns this shaft, due to the spool
and pin connection, to rotate the pump gear, so that
the GEROTOR can operate as a manually driven
pump to produce hydraulic fluid pressure.
C. GEROTOR PUMP
The GEROTOR pump provides the steering system
with a back-up device for steering, and operates as
previously described.
D. CHECK VALVE
The check valve normally remains closed, which pre-
vents the pressurized fluid from flowing from its “IN”
side to its “OUT” side. If fluid pressure is not available,
the check valve unseats permitting fluid to be drawn
from the reservoir to the “IN” side.
E. RELIEF VALVE
The relief valve prevents excess fluid pressure build-
up within the steering pump and circuit. This excess
pressure may be caused by the steering wheel being
turned to its full travel and against its stops or by pre-
venting the front wheels from turning.
STEERING SYSTEM - STRUCTURE
Lk30_08_steering.p65
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