Put the detent valve operating
lever into the neutral position
when the hydraulic implement
is not in use. If the detent valve
is kept in the operating position
for an extended period of time,
the relief valve is kept open and
the temperature of the hydraulic
fluid rises, leading to damage
of various hydraulic parts, such
as the oil seals and O-rings.
When the detent valve is in op-
eration, unnecessary load is ap-
plied to the engine. Therefore,
the engine power decreases
signicantly, and noise and vi-
bration by opening of the relief
valve increase.
It is hard to start the engine
while the detent valve is in op-
eration. This is especially true
in winter and exhaust gas in-
creases even after the engine is
started.
IMPORTANT
This tractor is equipped with the
remote control valve of the double
acting type. However, this valve can
also be used in the single acting type
hydraulic cylinder.
1. Connect one end of the hydraulic
port to the single acting cylinder as
shown in the figure. The hydraulic
pressure is properly supplied to the
cylinder. However, when the hydrau-
lic pressure is released, the cylinder
is contracted only if there is outer
force, such as potential energy.
SINGLE ACTING AND DOUBLE ACTING CYLINDER
(1) Single Acting Cylinder
(A) External Load
H11O585A
(1) Double Acting Cylinder
H11O586A
2. To contract the cylinder, operate
the lever to the opposite position of
the expansion. Then, the hydraulic
uid is supplied from the hydraulic
pump to the hydraulic port which
is not connected, and the pressure
rises as the port is blocked. How-
ever, this pressure is released as
the relief valve opens.
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