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HYDRAULIC LIFT VALVE/CYLINDER MANUAL - WHEEL HORSE
Table of Contents – Page 1 of 1
FOREWORD
CONTROL VALVE SERVICE
GENERAL INFORMATION
MANUFACTURING DATE CODE (OMCO)
VALVE DESCRIPTION (OMCO)
OVERHAUL KIT CONTENTS (OMCO)
OVERHAUL PROCEDURE (OMCO) SERVICE NOTES
DISASSEMBLY & R EA SS EM BL Y
VALVE DESCRIPTION (VICTOR)
OVERHAUL KIT CONTENTS (VICTOR) VICTOR 110068 & 111066 CONTROL
VICTOR 110492 CONTROL VALVE
OVERHAUL PROCEDURE (VICTOR) SERVICE NOTES
DISASSEMBLY & REASSEMBLY (SINGLE SPOOL VICTOR)
DISASSEMBLY (TWO SPOOL VICTOR)
ASSEMBLY (TWO SPOOL VICTOR)
LIFT CYLINDER SERVICE
GENERAL INFORMATION
CYLINDER DESCRIPTION
O-RING & GASKET KIT CONTENTS
OVERHAUL PROCEDURE SERVICE NOTES
DISASSEMBLY & R EA SS EM BL Y
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FOREWORD
This
service and repair manual has been compiled to provide
authorized Wheel Horse service personnel with proper procedures and
techniques for servicing hydraulic
used on Wheel Horse equipment.
Following Table of Contents
to read all sections first to become familiar with repair procedures.
Since valves and cylinders are hydraulic components, strict cleanÂliness must be maintained during all stages of service and repair.
Even a small amount of
components. Always use clean solvent when cleaning parts.
of
tamination
clean entire system. Clean
Transmission and transaxle must be cleaned to insure all contaminants
are removed.
hydraulic system has occurred or
dirt
or contamination can severely damage
lift
lift
control valves and cylinders
lists
all areas covered.
is
suspected, be sure to
cylinder, valve, all hoses and lines.
It
is
adviseable
If
con-
CONTROL VALVE SERVICE
GENERAL INFORMATION
MANUFACTURING DATE CODE (OMCO)
VALVE DESCRIPTION (OMCO)
OVERHAUL
OVERHAUL PROCEDURE (OMCO)
VALVE DESCRIPTION (VICTOR)
OVERHAUL
OVERHAUL PROCEDURE (VICTOR)
KIT
CONTENTS (OMCO)
KIT
CONTENTS (VICTOR)
________________________________________-~----.--~~~
- - - - -
- - - - - - - - - - - - - -
1
1
1
1
2
........................................
2
3
4
4
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GENERAL INFORMATION
This manual covers the overhaul of
lift control valves listed below.
&
102874
1973 18
tractors with Sundstrand hydrostatic transmission.
lift
relief valve located in the hydrostatic transmission.
103204
1973 16
tors with Sundstrand hydrostatic transmission.
system pressure
valve located in the hydrostatic transmission.
108494 (OMCO) Fig. 2
1980-82
Eaton hydrostatic transmission, except C-195. lift
system pressure
valve located to the right of the valve handle.
109679 (OMCO) Fig.
1982-83 C-195 Twin Automatic tractors.
pressure
located next to the outside valve handle.
110068
1983 & later
Eaton hydrostatic transmission, except C-195. AI-
though the valves are made by different vendors
and require different overhaul
changeable as complete assemblies. lift system
pressure
located next to the valve handle.
110492 (VICTOR) Fig. 11
1984 & later C-195 Twin Automatic tractors with
Eaton hydrostatic transmission.
is
inside valve handle.
10668 1 (OMCO) Fig. 1
HP
Automatic, 1974-80 D-Series Automatic
system pressure
&
106680 (OMCO)
HP
and 1974-80 C-Series Automatic trac-
is
is
regulated by an implement relief
-
C
&
GT-Series Automatic tractors with
is
regulated by an implement relief
2
-
is
regulated by an implement relief valve
&
11 1066 (VICTOR) Fig. 11
C
&
GT-Series Automatic tractors with
is
regulated by an implement relief valve
-
regulated by a relief valve located next to the
-
regulated by an implement
Fig.
1
-
the
-
kits,
they are inter-
lift
system pressure
hydraulic
lift
system
lift
set at 700
Severe transmission damage may result. Refer to the,
applicable repair manual for system pressure tests
and adjustments.
When the valve handle
valve inward, hydraulic port "A"
port
the spool valve
is
pressurized and port "A"
port. The spool valve
middle, "neutral" position, where ports "A" and
are sealed off from both the pressure and outlet ports.
These
to flow from the pressure port to the outlet port when
the spool
plished mechanically by the tractor's
MANUFACTURING
102874
PSI
-
do not attempt to alter this setting.
is
moved to push the spool
is
pressurized and
"B"
is
connected to the outlet port (Fig. 3). When
is
pulled outward, hydraulic port
is
connected to the outlet
is
spring loaded to return to
are open-center valves,
is
in neutral. Attachment "float"
so
hydraulic oil
lift
DATE
CODE
I03204
&
&
106681
VALVE
FIG
1.
OMCO
(Sundstrand Transmission)
MANUFACTURING
Control Valves
DATE
CODE
linkage.
I
06680
is
VALVE
"B"
"B"
is
free
accom-
a
MANUFACTURING DATE CODE (OMCO)
The month and year a particular hydraulic valve
was manufactured
outlet cover as shown in Figures 1
lines of information may be on the cover, which are
decoded as follows:
Example (on all valves): 0948 1 9
Example (on some valves): SR115 4
Manufacturer's Control numbers
Month Built
(1
=
January; 12
Year Built
(9
=
1979;
is
stamped on the flat side of the
&
2. One or two
=
December)
0
=
1980; 1 = 1981, etc)
0
VALVE DESCRIPTION (OMCO)
The hydraulic control valves are made up of one
or two
inlet and outlet cover. Normal working pressure
500-700
can be field adjusted. On Eaton systems the implement
relief valve
spool
valves and bodies, secured between an
PSI.
Sundstrand implement system pressure
is
part of the control valve and
is
factory
is
-1-
108494
VALVE
FIG.
FIG.
3.
109679
IMPLEMENT
2.
OMCO
(Eaton Transmission)
PRESSURE
FROM
TRANS.
OUTLET
TO
OMCO
Valve
VALVE
RELIEF
VALVE
Control Valves
INLET
TRANS.
Port
Identification