Kubota BX1870 Workshop Manual

HYDRAULIC SYSTEM
BX1870,BX2370,BX2670,LA203A,LA243A,RCK48(P),RCK54(P),RCK60B,RCK60D,RCK54D, WSM
5-M3
3. CONTROL VALVE
This position control valve is located under the hydraulic cylinder.
This control valve is mechanically connected to the position control lever.
Since the feedback rod is not equipped to the lift arm, the neutral position adjustment is adjusted by controlling
the position control lever.
The control valve controls the oil flow forced from the hydraulic pump and the oil returned back from the hydraulic
cylinder.
9Y1210855HYM0003US0
Neutral
When stopping the position control lever, the spool is
stopped.
The spool closes the oil flow from passage between
P port and C port.
Since the oil in the hydraulic cylinder is not drained
to T2 port, "Neutral" position is kept.
9Y1210855HYM0004US0
(1) Lift Arm
(2) Hydraulic Cylinder
(3) Control Valve Body
(4) Spool
(5) Lowering Adjusting Shaft
P: Pump Port
C: Cylinder Port
T1: Tank Port
T2: Tank Port
KiSC issued 02, 2017 A

Kubota BX1870 Specifications

General

Engine Type	Diesel
Engine Power	18 hp
Transmission	Hydrostatic
Fuel Capacity	6.6 gallons
Wheelbase	55.1 inches
Type	Sub-Compact Utility Tractor
Engine	Kubota D722
PTO Power	13.5 hp
Number of Cylinders	3
Cooling	Liquid
Drive	4WD
Drive Type	4WD
Width	44.5 inches
Hydraulic System Type	Open center
PTO Speed	540 RPM
Displacement	0.719 L
Fuel Tank Capacity	6.6 gallons
Gears	Infinite (2-range) forward and reverse
Front Tire Size	18x8.5-10
Rear Tire Size	26x12-12