Daedong Kioti LK30, Workshop Manual, Page: 246 / 326

8-8 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
2.4.1 POWER STEERING CONTROL
MOTOR
A. SPOOL AND SLEEVE
1. The spool (22) and sleeve (23) consists of the ro-
tary valve to selectively switch the fluid passage as
well as the direction of the fluid flow.
There are three types of fluid passage; Neutral, Right
turn, and Left turn.
2. The spool is fitted to be rotatable in the sleeve, which
is fitted into the bore of the valve body.
T h e s p o o l a n d t h e s l e e v e a r e m e c h a n i c a l l y
interconnected.
3. The springs (10), (11) are installed through the
spool (22) and sleeve (23) to maintain the con-
nected state of the spool and the sleeve.
This position corresponds to the neutral state, and
is kept as long as the steering wheel is not turned.
4. The pin is fitted to the drive shaft (15) and the sleeve
(23), there being some clearance between the pin
and the holes on the spool.
Therefore, when the shaft and sleeve rotate, the
spool rotates with approx. 10° of clearance. At this
moment, a fluid passage is formed between the
spool and the sleeve to operate the steering system.
When the shaft and sleeve stop rotating, the spool
and sleeve return to their original positions by the
spring. Then, the fluid passage is closed and the
return passage is open.
B. DRIVE SHAFT
The pump drive shaft (15) is slightly tilted off the spool
axis, and is splined to the pump gear of the GEROTOR
pump assembly by its bottom end.
In the event of loss of fluid pressure, turning the steer-
ing wheel drives the GEROTOR through this shaft to
operate the steering manually.
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 fluid from flowing from its inlet side to its
outlet side directly. When the steering system is manu-
ally operated, this valve forms the fluid passage so
that the fluid returned from the steering cylinder flows
to the GEROTOR pump for recirculation.
E. RELIEF VALVE
The relief valve (9a) prevents excessive hydraulic pres-
sure from building up in steering pump and circuit. In
other words, it protects the circuit when the steering
cylinder stroke is completed or the steering is not pos-
sible due to the outer force.
STEERING SYSTEM - OPERATING PRINCIPLE
Lk30_08_steering.p65
2007-07-26, ¿ÀÈÄ 12:05 Page 8
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