SnowEx RD User manual

September 1, 2020
Lit. No. 72188, Rev. 01
MECHANIC'S GUIDE
RD, HD & LT STRAIGHT BLADE
SNOWPLOWS
CAUTION
Read this manual before servicing the snowplow.
SNOWPLOWS

Lit. No. 72188, Rev. 01 September 1, 2020
TABLE OF CONTENTS
INTRODUCTION ..............................................................................................3
Recommended Tools and Available Service Items .....................................3
SAFETY ............................................................................................................4
Torque Chart ................................................................................................6
BLADE, A‑FRAME & HEADGEAR................................................................7
Installing the Emergency Transport Chain...................................................7
Aiming Headlamp Beams ............................................................................8
HYDRAULIC SYSTEM ....................................................................................9
SnowEx® Straight Blades Hydraulic System Specications ........................9
Hydraulic Unit Components Diagram ........................................................11
Valve Locations..........................................................................................12
Cartridge Valves ........................................................................................13
Check Valves .............................................................................................14
Relief Valves ..............................................................................................14
Hydraulic Fitting and Hose Installation ......................................................15
Blade Drop Speed Adjustment ..................................................................16
CAB CONTROLS ...........................................................................................17
Overview ....................................................................................................17
Operating the POWER GRIP™ Hand-Held Control ..................................18
Operating the Joystick Control...................................................................19
FLEET FLEX ELECTRICAL SYSTEM .........................................................21
Smooth Stop and One-Touch FLOAT Features .........................................21
SECURITY GUARD™ Snowplow Anti-Theft System ............................... 22
VEHICLE‑SIDE ELECTRICAL COMPONENTS .........................................25
Harness Diagram – 3-Port Isolation Module .............................................25
3-Port Isolation Module Overview ............................................................ 26
Scrape Maxx™ DOWN FORCE ACCESSORY KIT ....................................28
Overview and Installation Instructions .......................................................28
Operating Instructions............................................................................... 29
ELECTRICAL & HYDRAULIC SCHEMATICS ........................................... 30
Overview and Electrical/Hydraulic Legend............................................... 30
Headlamps.................................................................................................31
Electrical/Harnesses...............................................................................31
Typical LED Plow Light, Headlamp Control Module (HCM), and Harness
Diagram ..................................................................................................32
Typical LED Schematic.......................................................................... 33
Typical Dual-Wire Halogen/LED Schematic .......................................... 35
Dual-Wire Halogen/LED Installation...................................................... 37
EdgeView™ Blade-Edge Illumination System ....................................... 38
Electrical System Schematic – Straight Blade Snowplows ...................... 39
Hydraulic System Schematic – Straight Blade Snowplows ...................... 40
Attach Snowplow .......................................................................................41
Detach Snowplow ..................................................................................... 43
Raise......................................................................................................... 45
Lower .........................................................................................................47
FLOAT ....................................................................................................... 49
Angle Right ...............................................................................................51
Angle Left ................................................................................................. 53
Scrape Lock / While in FLOAT.................................................................. 55
Pump Pressure Relief & Angle Left/Right Relief ...................................... 56
Scrape Maxx Accessory Functions ...........................................................57
FLOAT: Build Down Force.......................................................................57
FLOAT: Maintain Down Force................................................................ 59
FLOAT: Blade Rises to Follow Surface...................................................62
TROUBLESHOOTING.................................................................................. 63
How to Use the Troubleshooting Guide .................................................... 63
Electrical Testing....................................................................................... 63
Before You Begin ...................................................................................... 64
Vehicle Headlamps ................................................................................... 65
Snowplow Headlamps .............................................................................. 66
Snowplow Park/Turn Lamps......................................................................67
Snowplow DRL Lamps ............................................................................. 68
Vehicle Lighting Check ............................................................................. 69
Solenoid Coil Activation Test (SCAT).........................................................70
Individual Solenoid Coil Test......................................................................72
Control/Cable/Plow Module Test ...............................................................73
Motor and Motor Relay Test.......................................................................74
Pump Pressure Test ..................................................................................75
Cartridge and Check Valve Removal.........................................................76
Relief Valve Inspection and Adjustment ................................................... 77
Scrape Lock Adjustment............................................................................78
Replacing Damaged Bearing Sleeves .......................................................79

Lit. No. 72188, Rev. 01 September 1, 2020
3
This guide has been prepared to assist the trained
mechanic in the service of SnowEx®snowplows.
It also provides safety information and
recommendations. We urge all mechanics to
read this manual carefully before attempting to
service the SnowEx snowplow equipment covered
by this guide.
Service of your SnowEx snowplow equipment is
best performed by your local SnowEx products
outlet. They know your snowplow best and are
interested in your complete satisfaction.
INTRODUCTION
RECOMMENDED TOOLS
• Needle-nose pliers
• Flat screwdriver
• 12V test light
• Torque wrench
• Hex key set, including 3/8"
• Combination standard wrench set
• 1/4" drive ratchet set with 6" extension
• 3/8" drive ratchet set
• Standard socket: 1"
• Digital volt/ohmmeter
• Amp clamp
• Pressure test kit
• Flashlight
• Pick set
• Hammer
• Pencil magnet
• Mini fuses: 5A and 10A
• Vacuum pump w/3/8" NPT barbed tting
• 3/8" NPT plug
AVAILABLE SERVICE ITEMS
• Motor Bearing Sleeve Repair Kit, PN 52251
• Pressure Test Kit, PN 85268
• Diagnostic Harness, PN 29290-2
• Seal Repair Tool, PN 52252
• 3-Port Isolation Module and Cab Control
Tester: PN 41000-1
• Back Probe Harness: PN 28957

Lit. No. 72188, Rev. 01 September 1, 2020
4
NOTE: Indicates a situation or action that can
lead to damage to your snowplow and vehicle
or other property. Other useful information
can also be described.
SAFETY
WARNING/CAUTION AND
INSTRUCTION LABELS
Become familiar with and inform users about
the warning and instruction labels on the back of
the blade.
NOTE: If labels are missing or cannot be read,
see your sales outlet.
Warning/Caution Label
CAUTION
Indicates a potentially hazardous situation
that, if not avoided, may result in minor
or moderate injury. It may also be used to
alert against unsafe practices.
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious personal injury.
SAFETY DEFINITIONS
Instruction Label
Warning Label

Lit. No. 72188, Rev. 01 September 1, 2020
5
HYDRAULIC SAFETY
Always inspect hydraulic components and hoses
before using. Replace any damaged or worn parts
immediately.
If you suspect a hose leak, DO NOT use your hand
SAFETY
SAFETY PRECAUTIONS
Improper installation and operation could cause
personal injury, and/or equipment and property
damage. Read and understand labels and the
Owner's Manual before installing, operating, or
making adjustments.
WARNING
Lower the blade when the vehicle is parked.
Temperature changes could change
hydraulic pressure, causing the blade to
drop unexpectedly or damaging hydraulic
components. Failure to do this could result
in serious personal injury.
WARNING
Remove blade assembly before placing
vehicle on hoist.
WARNING
The driver shall keep bystanders clear of
the blade when it is being raised, lowered,
or angled. Do not stand between vehicle
and blade or within 8 feet of a moving blade.
A moving or falling blade could cause
personal injury.
WARNING
Do not exceed GVWR or GAWR including
blade and ballast. The rating label is found
on driver‑side vehicle door cornerpost.
WARNING
To prevent accidental movement of
the blade, always turn the control OFF
whenever the snowplow is not in use. The
power indicator light will turn OFF.
WARNING
Keep hands and feet clear of the blade and
A‑frame when mounting or removing the
snowplow. Moving or falling assemblies
could cause personal injury.
CAUTION
Refer to the current online Power Match
selection system for minimum vehicle
recommendations and ballast requirements.
WARNING
Hydraulic uid under pressure can cause
skin injection injury. If you are injured
by hydraulic uid, get medical attention
immediately.
to locate it. Use a piece of cardboard or wood.
Loosen hydraulic components slowly to relieve any
residual pressure.
FUSES
The SnowEx®electrical and hydraulic systems
contain several automotive-style fuses. If a problem
should occur and fuse replacement is necessary,
the replacement fuse must be of the same type and
amperage rating as the original. Installing a fuse
with a higher rating can damage the system and
could start a re. Fuse Replacement information,
including fuse ratings and locations, is located in
the Maintenance section of the Owner's Manual.
PERSONAL SAFETY
• Remove ignition key and put the vehicle in
PARK or in gear to prevent others from starting
the vehicle during installation or service.
• Wear only snug-tting clothing while working
on your vehicle or snowplow.
• Do not wear jewelry or a necktie, and secure
long hair.
• Wear safety goggles to protect your eyes from
battery acid, gasoline, dirt, and dust.
• Avoid touching hot surfaces such as the
engine, radiator, hoses, and exhaust pipes.
• Always have a re extinguisher rated BC handy,
for ammable liquids and electrical res.
FIRE AND EXPLOSION
CAUTION
Do not mix di󰀨erent types of hydraulic
uid. Some uids are not compatible and
may cause performance problems and
product damage.

Lit. No. 72188, Rev. 01 September 1, 2020
6
Be careful when using gasoline. Do not use
gasoline to clean parts. Store only in approved
containers away from sources of heat or ame.
CELL PHONES
A driver's rst responsibility is the safe operation
of the vehicle. The most important thing you can
do to prevent a crash is to avoid distractions and
pay attention to the road. Wait until it is safe to
operate mobile communication equipment such as
cell phones, text messaging devices, pagers, or
two-way radios.
VENTILATION
BATTERY SAFETY
NOISE
Airborne noise emission during use is below
70 dB(A) for the snowplow operator.
VIBRATION
Operating snowplow vibration does not exceed
2.5 m/s2to the hand-arm or 0.5 m/s2to the whole
body.
TORQUE CHART
SAFETY
CAUTION
Batteries normally produce explosive
gases, which can cause personal injury.
Therefore, do not allow ames, sparks, or
lit tobacco to come near the battery. When
charging or working near a battery, always
cover your face and protect your eyes, and
also provide ventilation.
• Batteries contain sulfuric acid, which
burns skin, eyes, and clothing.
• Disconnect the battery before removing
or replacing any electrical components.
WARNING
Gasoline is highly ammable and gasoline
vapor is explosive. Never smoke while
working on vehicle. Keep all open ames
away from gasoline tank and lines. Wipe
up any spilled gasoline immediately.
WARNING
Vehicle exhaust contains lethal fumes.
Breathing these fumes, even in low
concentrations, can cause death. Never
operate a vehicle in an enclosed area
without venting exhaust to the outside.
1/4-20 10
91
54
1/4-28 12
11
71
5/16-1
81
50 212
5/16-2
41
70 240
3/8-16 26
93
76
3/8-24 29
74
20
7/16-1442
96
06
7/16-20
9/16-12
9/16-18
5/8-11
5/8-18
3/4-10
3/4-16
7/8-9
7/8-14 47
46
69
64
49
091-8
1-12 70
49
95
1/2-13
1/2-20
11.9
13.7
24.6
27.3
43.6
26.9
53.3
93
148
49.4
69.8
77.9
106.4
120.0
8.4
9.7
17.4
19.2
30.8
35.0
49.4
55.2
75.3
85.0
M6 x 1.00
M12 x 1.75
M8 x 1.25
M14 x 2.00
M10 x 1.50
M27 x 3.00
M22 x 2.50
M30 x 3.50
M24 x 3.00
M20 x 2.5011.1
19.5
38.5
67
107
7.7
613
778
1139
1545
450
428
562
796
1117
M33 x 3.50
M36 x 4.00
2101
2701
1468
1952
325
M16 x 2.00 231167
M18 x 2.50 318222
Recommended Fastener Torque Chart
Size Size
Torque (ft-lb)
Grade
5
Grade
8
Metric Fasteners Class 8.8 and 10.9
These torque values apply to fasteners
except those noted in the instructions.
Torque (ft-lb)
Grade
5
Grade
8
Size Size
Torque (ft-lb)
Class
8.8
Class
10.9
Torque (ft-lb)
Class
8.8
Class
10.9
Inch Fasteners Grade 5 and Grade 8
CAUTION
Read instructions before assembling.
Fasteners should be nger tight until
instructed to tighten according to torque
chart. Use standard methods and practices
when attaching snowplow, including proper
personal protective safety equipment.

Lit. No. 72188, Rev. 01 September 1, 2020
7
BLADE, A‑FRAME & HEADGEAR
INSTALLING THE EMERGENCY TRANSPORT CHAIN
Adapted from Chain Kit Installation Instructions (Lit. No. 84788, Rev. 01).
The Chain Kit (PN 84787) is used to temporarily
hold the blade and A-frame in a raised position
during transport to a service location.
1. Raise the A-frame against the stacking stop by
driving into a snow pile. The blade will naturally
ride up the pile as you drive into the snow pile.
2. Stop the vehicle once the blade is raised. Shift
the vehicle transmission to "PARK" and set
the parking brake to prevent the vehicle from
moving.
3. Turn the vehicle ignition to the "OFF" position
and remove the key.
4. Exit the vehicle.
5. Clear snow from the area around and
beneath the A-frame on either the driver's or
passenger's side of the snowplow.
6. Secure the A-frame to the stacking stop cross
bar using the chain with removable clevis
link. Wrap the chain around the bottom of the
A-frame tube and over the top of the stacking
stop cross bar. Connect the chain together
with the removable clevis link. Adjust the chain
by selecting the best combination of links to
minimize the amount of slack in the chain. The
A-frame should be as close as possible to the
stacking stop cross bar.
CAUTION
Use standard methods and practices
when attaching snowplow and installing
accessories, including proper personal
protective safety equipment.
CAUTION
Read this document before installing the
chain kit.
Stacking Stop
Cross Bar
A-Frame
A-FrameChain
Removable
Link
7. Install the two cotter pins into the clevis pins,
securing the pins in the clevis link.
8. Transport the snowplow to the service location.

Lit. No. 72188, Rev. 01 September 1, 2020
8
AIMING HEADLAMP BEAMS
Tighten headlamp fasteners to 22 ft-lb or 30 N·m
with rubber gasket once correct visual aim is
achieved.
Park the vehicle on a level surface 25 feet in front
of a matte-white screen, such as a garage door.
The screen should be perpendicular both to the
ground and to the vehicle centerline.
The vehicle should be equipped for normal
operation. The snowplow blade should be in place
and in raised position.
See that there is no load in the vehicle other than
the driver and ballast as specied in the online
snowplow selection system.
Below are steps listed by the Society of Automotive
Engineers (SAE) pertinent to headlamp aiming in
specication #SAE J599d.
1. Prepare the vehicle for headlamp aiming or
inspection. Before checking beam aim, the
inspector will:
a. Remove ice or mud from under fenders.
b. Set tire ination pressures to the values
specied on the vehicle information label.
c. Check the springs for sag or broken leaves.
d. Check the functioning of any automatic
vehicle leveling systems and specic
manufacturer's instructions pertaining to
vehicle preparation for headlamp aiming.
e. Clean the lenses.
f. Check for bulb burnout and proper beam
switching.
g. Stabilize the vehicle suspension by rocking
the vehicle sideways.
Vertical centerline of
DS snowplow headlamp
Align with vehicle
centerline
Vertical centerline of
PS snowplow headlamp
Screen located 25 feet
from snowplow headlamps
Horizontal centerline
of snowplow headlamp
s
High-intensity zones of snowplow
headlamps on low beam
2. Mark (or tape) the vertical centerline of
the snowplow headlamps and the vertical
centerline of the vehicle on the screen. Mark
the horizontal centerline of the snowplow
headlamps on the screen (distance from
ground to snowplow headlamp centers).
3. Align the top edge of the high-intensity zone
of the snowplow lower beam below the
horizontal centerline and the left edge of the
high-intensity zone on the vertical centerline
for each snowplow headlamp. (Refer to
diagram below.)
BLADE, A‑FRAME & HEADGEAR

Lit. No. 72188, Rev. 01 September 1, 2020
9
HD Blades
12V DC with +/– connection
4.5" dia 1.5 kW motor
2000 +/– 50 psi pump relief valve
4000 psi crossover relief valve
425 psi scrape lock
0.000477 gal/rev pump
Hydraulic hose 1/4 SAE 100R1 and 3/8 SAE 100R17
Electrical (approximate values)
• Solenoid Coil Resistance = 7 ohm
• Solenoid Coil Amperage Draw = 1.5A
• Motor Relay Coil Resistance = 6–7 ohm
• Motor Relay Amperage Draw = 0.7A
• Maximum Motor Amperage Draw:
◦LT and RD Snowplows (3" motor) = 150–200A
◦HD Snowplows (4" motor) = 200–250A
• Switch Accessory Lead Amperage Draw = 0.75A
Vehicle Control Harness Fuses
3‑Port Module (mini)
• Control and Park/Turn = 10A
Hydraulic Unit Harness Fuses
All (mini)
• 5A
Pump Motor Specications
LT Blades
12V DC with +/– connection
3" dia 0.8 kW motor
1800 +/– 50 psi pump relief valve
4000 psi crossover relief valve
425 psi scrape lock
0.000208 gal/rev pump
Hydraulic hose 1/4 SAE 100R1 and 3/8 SAE 100R17
RD Blades
12V DC with +/– connection
3" dia 0.8 kW motor
1800 +/– 50 psi pump relief valve
4000 psi crossover relief valve
425 psi scrape lock
0.000477 gal/rev pump
Hydraulic hose 1/4 SAE 100R1
The SnowEx straight blade hydraulic system
delivers fast, uniform speed for lifting and angling,
raising the blade in approximately 2 seconds and
angling side to side in approximately 3.5 seconds.
The hydraulic unit has built-in scrape lock
circuitry to prevent the blade from "oating up"
while plowing deep snow or stacking snow into
piles. To adjust the scrape lock setting, see the
Troubleshooting section of this manual.
Pump Relief Valve Setting
• RD and LT snowplows: 1800 psi
HD snowplow: 2000 psi
System Capacity
• Unit reservoir: 1-3/4 quarts
• System total: 2-3/8 to 2-3/4 quarts
Hydraulic Fluid
Use SnowEx® RAPID ACTION hydraulic uid
rated to –40°F (–40°C) or other uid conforming
to military specication MIL-H-5606 A, such as
Mobil Aero HFA or Shell AeroShell®Fluid 4. Use
of products other than these recommended uids
may cause poor hydraulic system performance and
damage to internal components.
HYDRAULIC SYSTEM
CAUTION
Do not mix di󰀨erent types of hydraulic uid.
Some uids are not compatible and may cause
performance problems and product damage.
AeroShell®is a registered (®) trademark of Shell Oil Company.
SnowEx®STRAIGHT BLADES – HYDRAULIC SYSTEM SPECIFICATIONS

Lit. No. 72188, Rev. 01 September 1, 2020
10
HYDRAULIC SYSTEM
SPECIFICATIONS, continued
Fastener Torque Speci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
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
Cover Screws 1/4-20 x 1/2 Shoulder Screw 60–80 in-lb
SAE O-Ring Plugs 1/8 or 5/32 Internal Hex 10–13 in-lb
Hydraulic Unit Mount Bolts 3/8-16 x 1 27–33 ft-lb
Check Valves 7/8 Hex Head 19–21 ft-lb
Motor Relay Small Terminals #10-32 Nut 10–15 in-lb
Motor Relay Large Terminals 5/16-24 Nut 25–35 in-lb
Motor Relay Mount Screws 1/4-20 x 1/4 50–70 in-lb
Plow Module Mount Screws 1/4-20 x 5/8 60–70 in-lb
Angle Ram Piston Locknuts 90–100 ft-lb
Lift Ram Piston Nut 30–40 ft-lb
Angle & Lift Rams Gland Nuts 120–150 ft-lb
Pressure Switch 24mm Hex 10–13 ft-lb

Lit. No. 72188, Rev. 01 September 1, 2020
11
HYDRAULIC UNIT COMPONENTS
HYDRAULIC SYSTEM
Breather
Reservoir
Plow Control Module
Relief Valves
Pump Shaft Seal
Filter
Pressure
Switch*
Solenoid
Cartridge V
alves
Quill‡
Manifold
90° Elbow
Pressure Switch†
O-Ring
Bearing Sleeve
Magnet
Plug
Motor
Motor Relay
Pump
Check Valves
Relief
Valve
2-Way Valve
4-Way Valve
* 550 psi for LT and RD blades; 725 psi for HD blades.
†For optional Scrape Maxx™ accessory, 200 psi.
‡
Blade drop speed adjustment.

Lit. No. 72188, Rev. 01 September 1, 2020
12
HYDRAULIC SYSTEM
VALVE LOCATIONS
Solenoid Cartridge Valves
Coil Valve Type Wire Color
S1 SV0 8 -2 211 PINK
S2C1 (Top) SV08- 47D DARK GREEN
S2C2 (Bottom) PURPLE
S3C1 (Top) SV08-47C YELLOW
S3C2 (Bottom) BROWN
S4 SV0 8 -2 211 BLUE
S2C2
S2
C1
S3C1
S1
S4
S3C2

Lit. No. 72188, Rev. 01 September 1, 2020
13
HYDRAULIC SYSTEM
CARTRIDGE VALVES
The SnowEx®straight blade snowplow
hydraulic system performs ve blade movement
functions and two blade attachment functions.
For installations that include the optional
Scrape Maxx™ kit, the hydraulic system also
applies the downward force that prevents the blade
from oating up.
All functions require the vehicle ignition (key)
switch to be in the "ON" or "ACCESSORY" position
and the power to be activated on the snowplow
cab control.
Three of the blade movement functions require
energizing the electric motor and opening solenoid
cartridge valves. The LOWER function does not
energize the motor but requires the opening of
two cartridge valves. The FLOAT function does not
energize the motor but requires the closing of one
cartridge valve once the blade has been lowered.
Power from the vehicle battery is supplied to the
solenoid coils and the motor relay via the plow
module. The solenoid cartridge valves operate in
various combinations, directed by the cab control,
to send hydraulic uid to the snowplow lift and
angle rams or back to the reservoir. (Power is
supplied to the plow module via the battery cable
and motor relay connection.)
Blade Movement Functions Automatixx®
System
Scrape Maxx Feature
(optional kit)
Solenoid
ATTACH
PLOW
DETACH
PLOW
BUILD
PRESSURE
TO 200 psi
CYCLE TO
MAINTAIN
200 psi
Motor MON ON ON ON ON ON ON/OFF
SV0 8 -2 211 S1 ON ON ON ON *
SV08-47D S2C1 ON ON
S2C2 ON ON ON/OFF
SV08-47C S3C1 ON
S3C2 ON
SV0 8 -2 211 S4 ON ON ON
* S1 remains in open position.
RAISE
LOWER
ANGLE
RIGHT
ANGLE
LEFT
FLOAT

Lit. No. 72188, Rev. 01 September 1, 2020
14
HYDRAULIC SYSTEM
CHECK VALVES
A check valve (CV) allows uid to ow in only one
direction.
Tighten check valves to 19–21 ft‑lb.
Check Valves
CV1 CV08-2059
CV2
RELIEF VALVES
Hydraulic uid is trapped in the base end of the
cylinder by the inactivated S3 solenoid cartridge
valve and the bidirectional relief valve.
If one side of the snowplow contacts an object
while plowing, the force of the impact increases
hydraulic pressure in the base end of the cylinder.
When pressure exceeds the nominal setting
value of the bidirectional relief valve, it opens to
allow hydraulic uid to ow to the base end of the
opposite cylinder.
The bidirectional relief valve is not adjustable.
For more detail, see the "Angle Left/Right Relief"
and "Pump Relief" pages in the Electrical &
Hydraulic Schematics section of this guide.
CV1
CV2
CR
1
Manifold
RV2 Scrape Lock
RV3 Pump Relief
Relief Valve Settings
CR1 Crossover Relief
(bidirectional) 4000 psi
RV2 Lift Ram Base End
(scrape lock) 425 psi
RV3 Pump Relief
LT: 1800 psi
RD: 1800 psi
HD: 2000 psi

Lit. No. 72188, Rev. 01 September 1, 2020
15
HYDRAULIC SYSTEM
NOTE: Overtightening JIC hose tting ends will
result in a fractured tting.
DO NOT use thread sealant/tape on hydraulic
hoses or ttings. These materials could damage
the product. Always use two wrenches to ensure
proper tightening of ttings and hoses.
To install SAE O-ring ttings in the valve block
and rams:
1. Turn the jam nut on the tting as far back as
possible.
2. Lubricate the O-ring with clean hydraulic uid.
3. Screw the tting into the port by hand until the
washer contacts the port face and the shoulder
of the jam nut threads.
4. Unscrew the tting to its proper position; no
more than one full turn.
5. Using two wrenches, hold the tting body
in position and tighten the jam nut until the
washer again contacts port face, then tighten
an additional 1/8 to 1/4 turn to lock the tting
in place. Final torque on the jam nut should be
approximately 20 ft-lb.
To install hydraulic hoses:
1. Screw the are nut onto the tting are and
hand tighten it.
2. Align the hose so that there are no twists or
sharp bends and so that it will not be pinched
or pulled by moving parts.
3. Using a pair of adjustable pliers, hold the
hose in position, and use a wrench to tighten
the are nut 1/8 to 1/4 turn beyond hand
tight. Final torque on the are nut should be
approximately 20 ft-lb.
4. Reinstall any protective hose wraps in their
original positions.
HYDRAULIC FITTING AND HOSE INSTALLATION
To Driver-Sid
e
Angle Ram
To Lift Ram
Base End
To
Lift Ram
Rod End
HD Unit Shown
To Passenger-Side
Angle Ram
Pressure Switch
(550 psi LT and RD blades,
725 psi HD blade)
90
° Elbows Angle Ram
Lift Ram

Lit. No. 72188, Rev. 01 September 1, 2020
16
3. Turn the quill IN (clockwise) to decrease
the drop speed. Turn the quill OUT
(counterclockwise) to increase the drop speed.
4. Replace the hydraulic unit cover.
HYDRAULIC SYSTEM
BLADE DROP SPEED ADJUSTMENT
The quill in the valve manifold adjusts the blade
drop speed.
1. Lower the blade to the ground before making
the adjustment.
2. Remove the hydraulic unit cover.
Quill
WARNING
Keep 8' clear of the blade when it is being
raised, lowered, or angled. Do not stand
between vehicle and blade or directly in
front of the blade. If the blade hits or drops
on you, you could be seriously injured.

Lit. No. 72188, Rev. 01 September 1, 2020
17
CAB CONTROLS
OVERVIEW
SnowEx®straight blade snowplows can be
operated by a POWER GRIP™ 9-button hand-held
control or by a joystick-style control.
Both types of cab controls are equipped with an
ON/OFF button or switch and an indicator light to
show when the control is powered ON or OFF. The
cab control is powered by the vehicle's battery, so
the vehicle ignition (key) switch must be ON to use
the control.
The ON/OFF button or switch allows the operator
to turn OFF the control and prevent blade movement
even when the vehicle ignition switch is ON.
The ON/OFF button or switch also serves as an
emergency stop, if required.
Controls are also used to program the
SECURITY GUARD™ anti-theft system and
activate the optional Scrape Maxx™ down
force feature (requires installation of the
84854-1 Scrape Maxx kit).
Power Indicator
Light (red)
ON/OFF Button
(emergency stop)
ON/OFF Switch
on Side of Control
(emergency stop)
Hand-Held ControlJoystick Control
All controls are protected by a replaceable fuse
located in the under-hood snowplow electrical
system. See "Fuse Replacement" in the
Maintenance section of the Owner's Manual.
The control is able to sense a lack of communication
with the electrical system. Should the indicator light
start to ash, refer to "Control/Cable/Plow Module
Test" in the Troubleshooting section of
this guide.
WARNING
To prevent accidental movement of the
blade, always push the ON/OFF button to
switch the control OFF whenever the
snowplow is not in use. The power indicator
light will turn OFF.

Lit. No. 72188, Rev. 01 September 1, 2020
18
1. Turn the vehicle ignition switch to the "ON" or
"ACCESSORY" position.
2. Press the ON/OFF button on the control. The
power indicator light glows red, indicating that
the control and vehicle ignition switch are
both ON and the electrical connections to the
snowplow are completed.
The ON/OFF button operates as an emergency
stop, if required.
The round buttons numbered 1, 2, 3, and 4
operate the SECURITY GUARD™ system.
See the SECURITY GUARD System section
of this guide for instructions.
Button "4" plus the ON/OFF button are used to
toggle the optional Scrape Maxx™ down force
feature ON and OFF.
Function Time‑Outs
All control functions, except LOWER/FLOAT, time
out (stop) automatically after a period of time. This
is to limit the amount of electrical energy required
from the vehicle.
The RAISE function times out after 3.0 seconds.
Angle Right and Angle Left functions time out after
3.5 seconds.
NOTE: If a control function times out before the
desired blade movement is complete, release
the button and press it again.
Automatic Shutdown
The control will automatically turn OFF after being
idle for 20 minutes. To reactivate the control after a
shutdown, press the ON/OFF button.
Smooth Stop and
One‑Touch FLOAT Features
When the Smooth Stop feature is active, the
control automatically allows the blade to coast to a
stop when a control button is released. When the
One-Touch FLOAT feature is active, the control
will immediately activate the FLOAT mode without
requiring the LOWER button to be held down.
For instructions on enabling/disabling these
features, see the FLEET FLEX Electrical System
section of this guide.
CAB CONTROLS
OPERATING THE POWER GRIP™ HAND‑HELD CONTROL
RAISE
LOWER
R
L
ON/OFFFLOAT
1
43
2
ON/
OFF Button
(emergency
stop)
Power Indicator
Light (red)
FLO
AT
Light
(green
)
Function Description of Operation
RAISE Press this button to raise the blade and
cancel the FLOAT mode.
LOWER
Press this button to lower the blade.
Release the button to stop the blade at
desired height.
FLOAT†
Press the LOWER button and hold
3/4 second to activate this mode. The
green FLOAT light in the upper left
corner of the control face will illuminate.
The blade will lower to the ground
surface and follow the contour of the
surface as it dips or rises. Function does
not time out; however, the control will
shut down after 20 minutes of nonuse.
Press the RAISE button momentarily
to cancel FLOAT. Angling left or right
will not interrupt (pause) the FLOAT
function.
L
(Angle Left) Press this button to angle the blade left.
R
(Angle Right)
Press this button to angle the blade
right.
†FLOAT mode activates immediately when the One-Touch
FLOAT feature is enabled. See the FLEET FLEX Electrical
System section for more information.
WARNING
The driver shall keep bystanders clear of the
blade when it is being raised, lowered, or
angled. Do not stand between vehicle and blade
or within 8 feet of a moving blade. A moving
or falling blade could cause personal injury.
Control Functions
Raise, Lower, Float, Angle
Pressing the four diamond-shaped buttons in the
center of the control face will result in the blade
movements described in the following table.

Lit. No. 72188, Rev. 01 September 1, 2020
19
CAB CONTROLS
OPERATING THE JOYSTICK CONTROL
1. Turn the vehicle ignition switch to the "ON" or
"ACCESSORY" position.
2. Slide the switch on the side of the control to the
"ON" position. The power indicator light glows
red, indicating that the control is ON. The
indicator light glows red whenever the control
and the vehicle ignition switch are both ON
and the electrical connections to the snowplow
are completed.
L R
RAISE
LOWER
ON/OFF FLOAT
12
34
Power Indicator
Light (red)
FLOAT Light
(green)
ON/OFF Switch
(e
mergency stop)
Function Time‑Outs
All control functions, except LOWER/FLOAT, time
out (stop) automatically after a period of time. This
is to limit the amount of electrical energy required
from the vehicle.
The RAISE function times out after 3.0 seconds.
Angle Right and Angle Left functions time out after
3.5 seconds.
NOTE: If a control function times out before the
desired blade movement is complete, release
the lever to the center position, then move it
back into the desired function.
Automatic Shutdown
The control will automatically turn OFF after being
idle for 20 minutes. To reactivate the control after a
shutdown, move the ON/OFF switch to OFF, then
back to ON.
Smooth Stop and
One‑Touch FLOAT Features
With the Smooth Stop feature enabled, the control
automatically allows the blade to coast to a stop
when the lever returns to center position. With the
One-Touch FLOAT feature enabled, the control
immediately activates the FLOAT mode without
requiring the lever to be held in the LOWER
position. For instructions on enabling/disabling
these features, see the FLEET FLEX Electrical
System section of this guide.
WARNING
The driver shall keep bystanders clear of the
blade when it is being raised, lowered, or
angled. Do not stand between vehicle and blade
or within 8 feet of a moving blade. A moving
or falling blade could cause personal injury.
The ON/OFF switch operates as an
emergency stop, if required.
Button "4" and the ON/OFF button are used to
toggle the optional Scrape Maxx™ down force
feature ON and OFF. For information about the
Scrape Maxx kit, see the Scrape Maxx Down
Force Kit section of this guide.

Lit. No. 72188, Rev. 01 September 1, 2020
20
Control Functions
Raise, Lower, Float, Angle
Moving the control lever straight up and down or
from side to side on the control body will result in the
blade movements described in the following table.
Function Description of Operation
RAISE
Move the control lever toward the top of
the control body to raise the blade and
cancel the FLOAT mode.
LOWER
Move the control lever toward the
bottom of the control body to lower the
blade. Release the lever to stop the
blade at desired height.
FLOAT†
Move the control lever to the LOWER
position and hold 3/4 second to activate
this mode. The FLOAT light in the upper
right corner of the control face will
illuminate. The blade will lower to the
ground surface and follow the contour of
the surface as it dips or rises. Function
does not time out; however, the control
will shut down after 20 minutes of
nonuse.
Move the lever to the RAISE position
momentarily to cancel FLOAT. Angling
left or right will not interrupt (pause) the
FLOAT function.
Joystick Control Lever Movement
From the center position, the control lever can be
moved in one of eight directions to control various
movements of the snowplow blade. To change
from one movement of the blade to another, the
control lever must be moved back to the center
position before selecting the desired function.
Whenever the lever is released, it should spring
back into the center position to stop any blade
movement.
Moving the control lever diagonally from the
center position toward any of the four digits on
the face of the control body will operate the
SECURITY GUARD™ system. For instructions,
see the SECURITY GUARD System section of
this guide.
CAB CONTROLS
L R
RAISE
LOWER
ON/OFF FLOAT
12
34
FLOAT Light
(green)
Function Description of Operation
L
(Angle Left)
Move the control lever straight to the left
to angle the blade left.
R
(Angle Right)
Move the control lever straight to the
right to angle the blade right.
†FLOAT mode activates immediately when the One-Touch
FLOAT feature is enabled. See the FLEET FLEX Electrical
System section for more information.
OPERATING THE JOYSTICK CONTROL, continued