Installation Instructions
8 HYDRAU
L1C
SYSTEM
81700'82100·82400 WSM,11770
[2] HYDRAULIC CYLINDER ASSEMBLY (HYDRAULIC CYLINDER, POSITION
CONTROL VALVE,
RELIEF
VALVE
AND
ETC)
CHECKING
AND
ADJUSTING
8177F816
Relief Valve Setting Pressure
1.
Remove the seat under cover.
2.
Remove
the
plug from
front
of
hydraulic cylinder block.
3.
Install
the
adaptor 58. Then connect
the
cable and pressure
gauge
to
adaptor 58.
4.
Remove
the
position control lever stopper.
5.
Start
the
engine and set
at
maximum speed.
6.
Move the position control lever all
way
up
to
operate
the
relief valve and read the gauge.
7.
If
the
pressure
is
not
within
the
factory specifications, adjust
with
the
adjusting shims (1).
8.
After
checking, reinstall
the
position control lever stopper.
Relief valve setting
13.2
to
13.7
MPa
Factory
spec.
135
to
140
kgf/cm
2
pressure
1920to
1991
psi
Condition
CD
Engine speed Maximum
• Oil temperature
45
to
55°C
113
to
131°F
(Reference)
.. Thickness
of
shims
(1)
:
0.1
mm (0.0039 in.)
0.4 mm (0.0157 in.)
0.8 mm (0.0315 in.)
•
Pressure
change per
0.1
mm (0.0039 in.)
shim:
Approx.
147.1
kPa
1.5
kgf/cm
2
21.3
psi
(1)
Shim
Lift
Arm
Free
Play
1.
Set
the
position control lever
(2)
to
the
lowest position.
2.
Start
the
engine, and set
at
the
idling
speed.
3.
Move
the
position
control
lever
(2)
to
the
uppermost
position. (Until
the
lever
(2)
contact
to
the
stopper plate (3).)
4.
Move
the
lift
arm
(1)
to
the
upper end by hand and measure
the free play.
5.
If
the
measurement
is
not
within
the
factory specifications,
adjust
the
free play by changing
the
position control feed
back rod setting length.
(3) Stopper Plate
Lift
a
rm
free play
(1)
LiftArm
(2) Position Control Lever
8-58
Factory
spec.
5to
10
mm
0.20
to
0.40 in.