Lit. No. 40694, Rev. 04
23
May 1, 2021
HYDRAULIC SYSTEM
The hydraulic unit's valve manifold includes a
cross-over relief valve to prevent damage to the blade
or vehicle if either end of the blade hits an obstacle.
The valve is preset and nonadjustable. When force
against the blade causes the pressure in an extended
ram to exceed the valve setting, the relief valve opens,
allowing
fl
uid to escape, and the ram retracts.
For hydraulic
fl
uid type and
fi
lling instructions, see
Hydraulic System, Annual Fluid Change, in the
Maintenance section of this manual.
Drain Plug
Reservoir
Valve
Manifold
Breather
Blade Drop
Speed Adjustment
Motor
OPERATING YOUR SNOWPLOW
Solenoid Valve
S1
S2
S3
Valve Model
SV08-22
SV08-47E
SV08-47C
Harness "C" Coil
S2-C1
S3-C1
Harness "B" Coil
S1
S2-C2
S3-C2
Plow Function
Active Coil
Active Port
Raise or Hitch
S2-C1
Lift Ram, Base End
Lower/Float
S1
Lift Ram, Base End
Angle Right
S3-C2
DS Angle Ram
Angle Left
S3-C1
PS Angle Ram
Unhitch
S2-C2 & S1
Lift Ram, Rod End
Torque Specifications
All Solenoid/Check Valves:
19–21 ft-lb
All Solenoid Coil Nuts:
48–60 in-lb
Motor Relay Terminals:
Small 10–15 in-lb
Large 25–35 in-lb
Motor Terminals:
50–60 in-lb
Drop Speed
Adjustment
(CW = Slower)
Hose Ports
Lift Ram, Base End
Lift Ram, Rod End
DS Angle Ram
PS Angle Ram
Pressure Test Port
SAE -4 ORB
S1
S1
S2
("E")
S3
("C")
S2C2
S2C1 S3C1
S3C2
48268
Hydraulic Information Label
(Located inside hydraulic unit cover.)
