Daedong Kioti LK30, Workshop Manual

Page: 265 / 326

9-5 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
2.3 HYDRAULIC PUMP
2.3.1 LOCATION AND STRUCTURE OF GEAR PUMP
265W903A
The hydraulic pump is driven by the fuel camshaft in
the engine.
The fuel camshaft rotates at one half of the engine
speed. The pump speed is doubled by the 34 gear (1)
and the 17 gear (2), so the pump rpm is the same as
the engine rpm.
The gear pump is divided into two parts. This is often
called as the tandem pump.
The first pump, which is close to the input shaft, sup-
plies hydraulic block assembly, auxiliary double acting
valve (option) and hydraulic lifting cylinder with fluid.
The second pump supplies steering unit.
2
1
Gear pump
Location
HYDRAULIC SYSTEM - OPERATING PRINCIPLE
Displacement
Max. maintaining
pressure
Speed range
Operating oil temperature
2.3.2 HYDRAULIC PUMP SPECIFICATIONS
Specifications for hydraulic pump
(tandem gear pump)
12.16 cc/rev
6.61 cc/rev
250 kgf/cm
2
250 kgf/cm 2
500 ~ 3,000 rpm
-25°C ~ 80°C
Pump 1
Pump 2
Pump 1
Pump 2
Engine: 2,600 rpm
Speed ratio of engine and gear pump: 1 : 1
The capacity of the first pump is 12 cc/rev. This means
12 cc of displacement for one turn. The displaced fluid
per minute at the rated engine speed (2600 rpm) is as
follows:
1st: (12.16 cc X 2,600 rpm) ÷ 1,000 =31.616 /min
2nd: (6.61 cc X 2,600 rpm) ÷ 1,000 =17.186 /min
Total : 48.802 /min
48.802/min ÷ 3.78543 = 12.892 GPM
Lk30_09_hydraulic.p65
2007-07-26, ¿ÀÈÄ 12:06 Page 5
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