Installation Instructions
7
STEERING
CHECKING, DISASSEMBLING
AND
SERVICING
CHECKING
B1700·B2100·B2400 WSM,11770
_IMPORTANT
•
Use
only
the
transmission
fluid
(See
page
S.G-3),
in no
case
use
mixture
of
oils
of
different
brands.
• Do
not
disassemble
the
hydraulic pump and
power
steering needlessly.
•
After
installing
or
reassembling the
power
steering hydraulic components,
be
sure
to
bleed air.
(Bleeding)
• Start
the
engine,
then
turn
the steering wheel slowly in both directions all the way alternately several times,
and stop
the
engine.
Steering Wheel Play
1.
Refer
to
the backlash between sector gear shaft and ball
nut
on page
7-S13.
Power steering wheel play
Reference
value
5.0
to
30.0 mm
0.2
to
1.2
in.
B177P196
Condition
• Engine speed Approx.
2600 rpm
• Oil temperature
45
to
55
°c
113
to
131
of
• Tractor by itself
(without
any implement and weight)
B177F707
Steering Wheel Operating
Force
1.
Park the tractor on
flat
concrete place.
2. Start the engine.
After
warming up, set the engine speed
at
approx.
2600
rpm.
3.
S'et
a spring balance
to
the steering wheel
to
measure the
operating force.
4.
If
the measurement
exceeds
the factory specification, check
the
suction line, delivery line, and
the
performance
of
hydraulic pump.
And then, check the power steering assembly.
49N
Steering
wheel
operating force Factory
spec.
Less
than
5.0
kgf
11
Ibs
Relief Valve Setting Pressure
1.
Remove
the
panel board, bonnet rear cover and
right
side
cover
to
remove the power steering delivery pipe (2).
2.
Remove
the power steering delivery pipe (2).
3.
Install the pressure
gal;Jge
(5)
to
another
power
steering
delivery pipe
(2), and conrect
it
to
the original position.
4. Start the engine.
After
warming up, set
the
engine speed
at
approx. 2600 rpm.
5.
Fully
turn
the steering wheel
to
the
left
or
right
end
to
read
the relief pressure.
After
reading, stop the engine.
6.
If
the pressure
is
not
factory specification, check the pump
delivery line and adjust
the
relief
valve
setting
pressure
(Refer
to
7-S8).
Power steering relief valve
11.28
to
11.77 MPa
setting pressure
Factory spec.
115
to
120 kgf/cm
2
1636
to
1707
psi
(1) Power Steering
Valve
(2) Delivery Pipe
(3) Return Pipe
(4) Hydraulic Pump
(5) Pressure Gauge
7-S4