82410
• 82710 • 82910 WSM, 12271
3 TRANSMISSION
Charge Relief Pressure
and
High Relief Pressure
A CAUTION
• When
checking,
park
the
tractor
on
flat
ground
and fUlly
engage
the
parking
brake.
1.
Remove the lowering speed adjusting knob and dipstick, then
remove the seat under cover.
2.
Assemble the HST adaptor A and threaded joint with O-ring and
back
up
ring (Refer to G-38).
• Charge Relief
Pressure
1.
Remove the neutral valve assembly one side (forward
(1)
or
reverse (2)) then install the assembled HST adaptor A to
its
neutral valve port.
2.
Install the cable and low pressure gauge to HST adaptor
A.
3.
Change the range gear shift lever to
Low
position. '
4.
Start the engine and run it at the maximum speed.
5.
Read the low pressure gauge to measure the charge relief
pressure.
6.
If
the measurement
is
not same as factory specification, check
the charge relief valve and related hydraulic components.
• High Relief Pressure
1.
Remove the neutral valve assembly forward (1), then install the
assembled HST adaptor A to its neutral valve port.
2.
Install the cable and high pressure gauge to HST adaptor
A.
3.
Change the range gear shift lever to
High
position.
4.
Start the engine and run it at the maximum speed.
5.
Depress the speed control pedal forward and read the high
pressure gauge to measure the forward high relief pressure.
6.
Stop the engine and change the installation
of
HST adaptor A and
pressure gauge from forward neutral valve port to reverse.
7.
Start engine and repeat above method
(4.
and 5.) to measure the
reverse high relief pressure.
8.
If
the measurement
is
not same as factory specification, check
the high pressure relief valve and related hydraulic components.
Factory spec. 500 to 800 kPa
Charge relief pressure
(Oil temperature at 50
5.1
to 8.2 kgf/cm
2
°C,
122
OF)
73 to 116 psi
Factory spec.
30.9 to 31.9 MPa
High relief pressure
(Oil temperature at 50 315 to 325 kgf/cm
2
°C,
122
OF)
4480 to 4622 psi
58.8 to 68.6 N·m
Tightening torque Neutral valve cap screw
6.0 to 7.0 kgf·m
43.4 to 50.6 ft-Ibs
• IMPORTANT
• Measure
quickly
so
that
the
high
pressure relief valve may
not
be
in
operation
more
than
10 seconds.
• NOTE
• High pressure
gauge
is 40 MPa (400 kgf/cm
2
,
5800 psi)
full
scale.
•
Low
pressure
gauge
is
2 MPa (20 kgf/cm
2
,
290
psi)
full
scale.
• When reinstall
the
neutral
valve, take care
not
to
damage
the
O-ring.
(1)
Neutral Valve (Forward)
3-S9
(2)
Neutral Valve (Reverse)
12490830420
To Next Page
Loading...
Need help?
General
