Installation Instructions

8 HYDRAU Lie SYSTEM
II Hydraulic System
The hydraulic system of these tractors are
composed of a hydraulic pump, hydraulic block type
outlet, control valve, hydraulic cylinder, hydraulic oil
filter and other components.
This system has the following functions.
1. Position control of the rear implement connected
to the 3-point hitch.
2. Hydraulic power take off from the hydraulic block
type outlet to operate the implements such as a
front loader, front blade and etc.
[2] HYDRAULIC PUMP
B1700·B21 00·B2400 WSM, 11772
• Oil is supplied by a hydraulic pump connected to
the engine. When an engine is started, a hydraulic
pump starts running, sucks oil from a transmission
case. The hydraulic pump forces out the oil to
power steering, hydraulic block type outlet,
control valve, hydraulic cylinder and hydrostatic
transmission (only for HST).
Displacement
Engine speed
Condition
22.0.D/min.
13.2to13.7MPa
5.8 U.S.GPM At 2600 rpm
135
to 140 kg/cm
2
4.8Imp.GPM
1920 to 1991 psi
The hydraulic pump is composed of the casing (1),
cover (3), side plate (5), and two spur gears (drive
gear (4) and driven gear (2» that are in mesh.
Hydraulic pump is driven by the fuel camshaft.
Maximum displacement is as follows.
B177F805
4
5
(1) Casing
(2) Driven Gear
(3) Cover
(4) Drive Gear
(5)
Side Plate
[3] FLOW PRIORITY VALVE
The flow priority valve is a flow devider that
devides the flow from single hydraulic source
(hydraulic pump) to actuates two circuits (position
control circuit and power steering circuit)
simultaneously.
This valve feeds fixedly controlled flow (5 il min,
1.3 U.S. GPM, 1.1 Imp. GPM) to the PF port with
priority and excessive flow to the EF port.
1
B177F806
t
P Port
3
(1) Spring
(2) Spool
(3) Valve Body
E8-M3