Blizzard 57520-1, Owner'S Manual

Page: 23 / 40

Lit. No. 40688, Rev. 04 23 May 1, 2012
HYDRAULIC SYSTEM
The hydraulic unit's valve manifold includes relief
valves to prevent damage to the blade or vehicle if
either end of the blade hits an obstacle. The valves
are preset and nonadjustable. When force against
the blade causes the pressure in an extended ram to
exceed the set limits, 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.
Motor
Breather
Reservoir
Drain Plug
Blade Drop
Speed Adjustment
Valve
Manifold
OPERATING YOUR SNOWPLOW
Drop Speed Adjustment
(CW = Slower)
Hose Ports
Lift Ram, Rod End
Lift Ram, Base End
DS Angle Ram
PS Angle Ram
Pressure Test Port
SAE -4 ORB
S1
S1
S2
("E")
S3
("C")
S2C2
S2C1 S3C1
Some components not shown.
S3C2
48421
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
Hydraulic Information Label
(Located inside hydraulic unit cover.)