Lit. No. 30118, Rev. 00
June 15, 2020
13
Hydraulic Fluid
Use SnowEx
®
Hydraulic Fluid to –40°F (–40°C)
or other
fl
uid conforming to military speci
fi
cation
MIL-H-5606 A, such as Mobil Aero HFA or Shell
AeroShell
®
Fluid 4. Use of products other than
these recommended
fl
uids may cause poor
hydraulic system performance and damage to
internal components.
The hydraulic system delivers fast and uniform
speed for blade movement, raising the blade in two
seconds and performing all angling functions in
less than
fi
ve seconds.
Relief Valve Settings
• Pump Relief Valve (1): 2250
±
100 psi
1-3/4 turns CCW from fully seated
• Base-End Relief Valves (2): 3400
±
100 psi
1-1/8 turns CCW from fully seated
• Rod-End Relief Valves (2): 2200
±
100 psi
1-3/4 turns CCW from fully seated
• Scrape Lock Relief Valve (1): 210 psi
1-3/4 turns CCW from fully seated
Pump Motor
12V DC with +/– Connection
3.0" dia. 0.8 kW Motor
2200–2300 psi Pump Relief Valve
3400 psi Plowing Relief Valves
2200 psi Back Dragging Relief Valves
0.000477 gal/rev Pump
Hydraulic Hose 1/4 SAE 100R1
System Capacity
• Unit reservoir: 1-3/4 quarts
• System total: 2-1/8 quarts
HYDRAULIC SYSTEM
CAUTION
Do not mix di
ff
erent types of hydraulic
fl
uid.
Some
fl
uids are not compatible and may cause
performance problems and product damage.
AeroShell
®
is a registered (
®
) trademark of Shell Oil Company.
HYDRAULIC SYSTEM SPECIFICATIONS
Electrical System
(Approximate Values)
• Solenoid Coil Resistance = 7 ohm @ room temp.
• Solenoid Coil Amperage Draw = 1.5A
• Motor Relay Coil Resistance = 5.4 ohm
• Motor Relay Amperage Draw = 3A
• Maximum Motor Amperage Draw = 190A over
relief at 2250 psi
• Switch Accessory Lead Draw = 0.75A
Fuses
• Hydraulic Unit Harness Fuses: 5A mini
Fastener Torque Speci
fi
cations
Pump Cap Screws
5/16-18 x 2-1/4
150–160 in-lb
Motor Terminals (+ and –)
5/16-18 Nut
50–60 in-lb
Motor to Manifold Cap Screws
M5 x .8 Bolt
30–40 in-lb
Reservoir Screws
#10-24 x 5/16
30–35 in-lb
Solenoid Valves
7/8 Hex Head
19–21 ft-lb
Coil Nuts
3/4 Hex-Head Jam Nut
40–60 in-lb
SAE O-Ring Plugs
1/8 or 5/32 Internal Hex
55–65 in-lb
Hydraulic Unit Mount Bolts
3/8-16 x 1
25–33 ft-lb
Check Valves
7/8 Hex Head
19–21 ft-lb
Secondary to Primary Manifolds
1/4-20 x 3-1/2
7–9 ft-lb
Motor Relay Small Terminals
#10-32 Nut
15 in-lb max
Motor Relay Large Terminals
5/16-24 Nut
35 in-lb max
Motor Relay Mount Screws
1/4-20 x 3/8
60–70 in-lb
Plow Module Mount Screws
1/4-20 x 3/8
60–70 in-lb
Angle Ram –4 Elbow Fitting Nut
11–12 in-lb
Angle Ram Piston Locknuts
90–100 ft-lb
Lift Ram Piston Nut
90–100 ft-lb
Angle Ram Gland Nuts
120–150 ft-lb
Lift Ram Gland
30–40 ft-lb
