Western Prodigy Mechanic's Guide

April 15, 2021

Lit. No. 48174, Rev. 03

MECHANIC'S GUIDE

SNOWPLOWS

Featuring the

FloStat® PRODIGY™ Hydraulic System &

Isolation Module Light System

SNOWPLOWS

CAUTION

Read this manual before servicing the snowplow.

Lit. No. 48174, Rev. 03 April 15, 2021

TABLE OF CONTENTS

INTRODUCTION ..............................................................................................4

Recommended Tools; Available Service Items ...........................................4

SAFETY ............................................................................................................5

Torque Chart ................................................................................................8

BLADE, A-FRAME & LIFT FRAME ...............................................................9

Attaching A-Frame to Lift Frame..................................................................9

Stand Shoe Height Adjustment ..................................................................10

Cable Adjustment .......................................................................................11

Using the Wing Spring Removal Tool ........................................................12

Aiming Headlamp Beams ..........................................................................14

HYDRAULIC SYSTEM ..................................................................................15

PRODIGY™ FloStat® Hydraulic System Speciﬁ cations ............................15

Hydraulic Unit Components .......................................................................16

Hydraulic Component Installation ..............................................................17

Valve Locations ..........................................................................................18

ELECTRICAL SYSTEM .................................................................................19

Wiring – 3-Port Module ..............................................................................19

Electrical Assembly................................................................................... 20

Cover and Final Assembly .........................................................................21

CONTROLS ................................................................................................... 22

General Information .................................................................................. 22

CabCommand Hand-Held FLEET FLEX Control ..................................... 23

Joystick FLEET FLEX Control ...................................................................24

SECURITY GUARD™ Snowplow Anti-Theft System ............................... 26

THEORY OF OPERATION ........................................................................... 29

Snowplow Hydraulics ................................................................................ 29

3-Port Module Electrical ........................................................................... 29

ELECTRICAL & HYDRAULIC SCHEMATICS ............................................32

Electrical & Hydraulic Legends ..................................................................32

Electrical Schematic – 3-Port Module ...................................................... 33

Hydraulic Schematic ................................................................................. 34

Raise – Electrical ...................................................................................... 35

Raise – Hydraulic ...................................................................................... 36

Lower – Electrical ......................................................................................37

Lower – Hydraulic ..................................................................................... 38

Angle Right – Electrical ............................................................................ 39

Angle Right – Hydraulic ............................................................................ 40

Angle Left – Electrical ................................................................................41

Angle Left – Hydraulic ................................................................................42

Striking an Object While Plowing (DS) – Hydraulic .................................. 43

Striking an Object While Plowing (PS) – Hydraulic ................................... 44

Hold in Raise Position – Hydraulic ........................................................... 45

Low-Beam Headlamps with Snowplow Connected to Vehicle ................. 46

High-Beam Headlamps with Snowplow Connected to Vehicle .................47

TROUBLESHOOTING GUIDE ..................................................................... 48

How to Use the Troubleshooting Guide .................................................... 49

Electrical Testing ....................................................................................... 49

Before You Begin ...................................................................................... 50

Vehicle Headlamps ....................................................................................51

Snowplow Headlamps ...............................................................................52

Snowplow Park/Turn Lamps ..................................................................... 53

Snowplow DRL Lamps ............................................................................. 54

Vehicle Lighting Check ............................................................................. 55

Solenoid Coil Activation Test (SCAT) ........................................................ 56

Individual Solenoid Coil Test ..................................................................... 59

Control/Cable/Plow Module Test .............................................................. 60

Motor and Motor Relay Test .......................................................................61

Pump Pressure Test ..................................................................................62

Replacing Damaged Bearing Sleeves ...................................................... 63

Lit. No. 48174, Rev. 03 April 15, 2021

4

This guide has been prepared to assist

the trained mechanic in the service of

WESTERN® snowplows. It also provides safety

information and recommendations.

We urge all mechanics to read this manual

carefully before servicing the WESTERN snowplow

equipment covered by this guide.

Service of your WESTERN snowplow equipment

is best performed by your local Western Products

outlet. They know your snowplow best and are

interested in your complete satisfaction.

INTRODUCTION

RECOMMENDED TOOLS

• Long/slender needle-nose pliers

• Flat screwdriver

• 12V test light

• Torque wrench

• Allen wrench set, including 3/8" Allen wrench

• Combination standard wrench set

• Drive ratchet set: 1/4" with 6" extension

• Drive ratchet set: 3/8"

• Deep socket: 7/8"

• Standard socket: 1"

• Tappet wrench: 11/16"

• Socket and wrench: 1-1/2"

• Angle-head wrenches: 15° & 60°

• Digital volt/ohmmeter

• Ammeter

• Pressure test kit

• Flashlight

• Pick set

• Hammer

• Pencil magnet

• TORX® drivers: T20 & T30

• Mini fuses:

5A (all)

10A (3-port module)

• Vacuum pump w/3/8" NPT barbed ﬁ tting

• Plug: 3/8" NPT

TORX® is a registered (®) trademark of Textron, Inc.

AVAILABLE SERVICE ITEMS

• Motor Bearing Sleeve Repair Kit, PN 64589

(Requires 3/8"-24 x 4" hex cap screw, not included.)

• Pressure Test Kit, PN 56679

• Diagnostic Harness, PN 29290-2

• Pump Shaft Seal Repair Kit, PN 28856

(Requires 1/4"-28 x 4-1/2" hex cap screw, not

included.)

• PRODIGY™ Wing Spring Removal Tool,

PN 69780

• Isolation Module Test Connector, PN 28957

Lit. No. 48174, Rev. 03 April 15, 2021

5

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/caution 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

Lit. No. 48174, Rev. 03 April 15, 2021

6

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.

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 to locate it. Use a piece of cardboard or

wood.

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 Quick Match

selection system for minimum

vehicle recommendations and ballast

requirements.

FUSES

The WESTERN® 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 ﬁ re. Fuse

Replacement, 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-ﬁ 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 ﬁ re extinguisher rated BC

handy, for ﬂ ammable liquids and electrical

ﬁ res.

WARNING

Hydraulic ﬂ uid under pressure can cause

skin injection injury. If you are injured

by hydraulic ﬂ uid, get medical attention

immediately.

Lit. No. 48174, Rev. 03 April 15, 2021

7

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/s2 to the hand-arm or 0.5 m/s2 to the whole

body.

FIRE AND EXPLOSION

Be careful when using gasoline. Do not use

gasoline to clean parts. Store only in approved

containers away from sources of heat or ﬂ ame.

CELL PHONES

A driver's ﬁ 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

SAFETY

CAUTION

Batteries normally produce explosive

gases, which can cause personal injury.

Therefore, do not allow ﬂ 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 ﬂ ammable and gasoline

vapor is explosive. Never smoke while

working on vehicle. Keep all open ﬂ 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.

Lit. No. 48174, Rev. 03 April 15, 2021

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SAFETY

1/4-20 109 154

1/4-28 121 171

5/16-18 150 212

5/16-24 170 240

3/8-16 269 376

3/8-24 297 420

7/16-14 429 606

7/16-20

9/16-12

9/16-18

5/8-11

5/8-18

3/4-10

3/4-16

7/8-9

7/8-14 474 669

644 9091-8

1-12 704 995

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 2.00 231

167

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 ﬁ nger tight until

instructed to tighten according to

torque chart. Use standard methods and

practices when attaching snowplow,

including proper personal protective

safety equipment.

TORQUE CHART

Lit. No. 48174, Rev. 03 April 15, 2021

9

ATTACHING A-FRAME TO LIFT FRAME

Determine Pivot Plate Hole Position

Before measuring the vehicle mount height, the

vehicle must be parked on a level surface, ballast

must be installed, if required, and the vehicle

mount and receiver brackets must be installed.

BLADE, A-FRAME & LIFT FRAME

1. Measure the distance "d" from the ground to

the top edge of the receiver bracket. Measure

both sides and determine average value for "d."

2. Use distance "d" from Step 1 and the following

chart to determine the proper pivot plate hole

position.

Pivot Plate Hole Position Chart

Distance "d" Hole Position

13.0" – 14.5" 1

14.5" – 16.0" 2

16.0" – 19.0" 3

Top Edge of

Receiver

d

Position 1

Position 2

Position 3

Vehicle Mount

Receiver Bracket

Hairpin Cotter

Driver-Side

Receiver Shown

Excerpts taken from PRODIGY™ Snowplow Installation Instructions (Lit. No. 42419, Rev. 02).

Install Pivot Bar to Pivot Plates

1. Position the A-frame and pivot bar between

the pivot plates, aligning the hole at each end

of the pivot bar with the appropriate hole in the

pivot plate as determined by distance "d."

2. On each side, insert 1" x 4-3/4" clevis pins

from the inside of the pivot bar through the

correct pivot plate holes. Secure the clevis pins

with 1" ﬂ at washers and 1/4" x 1-1/2" cotter pins.

1" x 4-3/4"

Clevis Pin

1" Flat

Washer

1/4" x 1-1/2"

Cotter

Pivot Plates

Pivot Bar

Lit. No. 48174, Rev. 03 April 15, 2021

10

STAND SHOE HEIGHT ADJUSTMENT

Initial stand shoe height adjustment is based on

the receiver height measurement (distance "d")

determined in Step 1 under "Determine Pivot Plate

Hole Position." A ﬁ nal adjustment of the stand shoe

will be made after attaching the snowplow to the

vehicle.

1. Slide the stand shoe into the stand tube and

align the 1/4" hole in the stand tube with the

1/4" hole in the stand shoe as determined from

the chart and illustration.

Stand Shoe Position Chart

Distance "d" Position

13.0" – 14.5" 1

14.5" – 16.0" 2

16.0" – 17.5" 3

17.5" – 19.0" 4 2. Insert the 1/4" roll pin.

3. Do not cut the spring tie until after the ﬁ nal

stand shoe adjustment.

WARNING

The stand plunger spring is shipped

compressed and tied. Do not cut the

spring tie until ﬁ nal stand shoe adjustment

is complete and the roll pin is installed.

Position 1

Position 2

Position 3

Spring Tie

Position 4

1/4" Roll Pin

BLADE, A-FRAME & LIFT FRAME

Excerpts taken from PRODIGY™ Snowplow Installation Instructions (Lit. No. 42419, Rev. 02).

Lit. No. 48174, Rev. 03 April 15, 2021

11

5. Once the stop is making contact with the

blade rib, lock the hex nut into position with

the 3/4" jam nut.

6. Repeat Steps 1–5 on the passenger's side of

the blade assembly, this time angling the blade

fully to the right.

NOTE: Adjusting the 3/4" hex nut inward too

far will cause the wing stop to contact the

blade rib before the blade is fully angled. This

condition can stretch the cables and shorten

their service life.

7. Grease the ﬁ ttings on the wing hinges.

3. Return the blade to the straight position and

adjust the hex nut 1/4 turn clockwise. Angle

the blade fully left and inspect the area

between the wing stop and the blade rib

again.

4. Continue making this adjustment until the

wing stop just contacts the blade rib when

the blade is fully angled left.

BLADE, A-FRAME & LIFT FRAME

CABLE ADJUSTMENT

1. Angle the blade fully left and inspect the area

between the driver-side wing stop and the

driver-side blade rib.

2. If there is a gap between the wing stop and the

blade rib, skip to Step 3.

If there is no gap, return the blade to the

straight position and loosen the 3/4" jam

nut and 3/4" hex nut on the end of the cable

1/4 turn. Repeat this adjustment until a gap can

be seen.

Blade Rib

Wing Stop

Grease Fitting

Blade

Rib

Wing stop must just contact the

blade rib when the blade is fully angled.

3/4" Hex Nut3/4" Jam Nut

Excerpts taken from PRODIGY™ Snowplow Installation Instructions (Lit. No. 42419, Rev. 02).

Lit. No. 48174, Rev. 03 April 15, 2021

12

6. Assemble the washer, thrust bearing (inserted

into bearing nut), and bearing nut onto the

threaded rod.

7. Attach the socket to the bearing nut and

tighten to compress the spring until the load is

removed from the wing pivot pin.

8. Remove the stop bolt and nut from the outer

rib; then remove the wing pivot pin.

BLADE, A-FRAME & LIFT FRAME

USING THE WING SPRING REMOVAL TOOL (PN 69780)

1. Park the vehicle on a smooth, level, hard

surface, such as concrete. Position the blade

straight ahead. Lower the blade to the ground,

and turn the control OFF.

2. Remove the cable assemblies.

3. For trip blade snowplows, remove the trip

springs and remove the blade from the

quadrant. Position the blade assembly face

down and support the main blade so that the

wings do not touch the ground.

4. Insert the threaded rod through the moldboard

bushing hole in the center blade rib, and

through the spring and wing spring guide.

5. Secure the rod with two 3/4" nuts on the outer

end of the threaded rod. Position the nuts ﬂ ush

with the end of the threaded rod and lock the

nuts together. This tool may be used with an

air impact gun on the socket to compress the

spring.

WARNING

The wing spring removal tool must be

used by qualiﬁ ed personnel to remove

preloaded spring. Read and follow all

instructions. Disconnect snowplow from

vehicle before doing this repair.

Excerpts taken from Wing Spring Removal Tool Parts List & Installation Instructions (Lit. No. 68335, Rev. 01).

WARNING

The two nuts must be locked together to

prevent the threaded rod from becoming

disengaged from the nuts when the tool is

in use. Failure to lock the nuts may result

in the sudden release of stored energy in

the spring, resulting in personal injury and

damage to the snowplow.

Trip Spring

Quadrant

Locknut

Pivot Bushing

Lock the

two 3/4" nuts

together.

Wing

Spring Guide

Bushing Hole

in Center

Blade Rib

Stop Bolt

and Nut

Wing Pivot Pin

Lit. No. 48174, Rev. 03 April 15, 2021

13

9. Using the socket, loosen the bearing nut

to release the tension on the spring while

manipulating the wing past the end moldboard

rib.

10. Fully release the spring tension and remove

the tool. Remove the wing, spring guide, and

spring.

BLADE, A-FRAME & LIFT FRAME

USING THE WING SPRING REMOVAL TOOL (continued)

Washer Thrust

Bearing

Bearing Nut

Socket

Spring Installation

1. Slide the spring over the wing spring guide.

2. Insert the wing, spring guide, and spring

assembly through the opening in the outer

blade rib.

3. Assemble the wing spring tool as described in

Steps 4–7 on the previous page.

4. Gradually tighten the bearing nut to compress

the spring while guiding the spring guide and

wing through the opening in the outer blade rib.

5. Manipulate the wing to align the pivot hole in

the wing with the hole in the blade, and insert

the wing pivot pin.

6. Install the stop bolt and nut.

7. Remove the wing spring tool.

Lit. No. 48174, Rev. 03 April 15, 2021

14

AIMING HEADLAMP BEAMS

Torque headlamp fasteners to 45 ft-lb for H13

headlamps, and 22 ft-lb or 30 N·m for H9/H11

headlamps, once correct visual aim is achieved.

1. Place 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.

2. The vehicle should be equipped for normal

operation. The snowplow blade should be in

place and in raised position. Below are steps

listed by the Society of Automotive Engineers

(SAE) pertinent to headlamp aiming in

speciﬁ cation #SAE J599d.

3. Prepare the vehicle for headlamp aiming or

inspection. Before checking beam aim:

a. Remove ice or mud from under fenders.

b. Set tire inﬂ ation pressures to the values

speciﬁ ed on the vehicle information label.

c. Check the springs for sag or broken leaves.

d. See that there is no load in the vehicle

other than the driver and ballast as

speciﬁ ed in the Quick Match selection

system.

e. Check the functioning of any automatic

vehicle leveling systems and speciﬁ c

manufacturer's instructions pertaining to

vehicle preparation for headlamp aiming.

f. Clean the lenses.

g. Check for bulb burnout and proper beam

switching.

h. 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 headlamps

High-intensity zones of snowplow

headlamps on low beam

Excerpts taken from UltraMount® 2 Owner's Manual (Lit. No. 43181, Rev. 01).

4. 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).

5. 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 & LIFT FRAME

Lit. No. 48174, Rev. 03 April 15, 2021

15

Electrical System (approximate)

• 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 = 250A over

relief at 2250 psi

• Switch Accessory Lead Draw = 0.75A

Pump Relief Valve Setting

• 2250 psi

• 2-1/2 turns CCW from fully seated

System Capacity

• Unit reservoir: 1-3/4 quarts

• System total: 2-3/8 to 2-3/4 quarts

Hydraulic Fluid

Use WESTERN® Hydraulic Fluid rated

to –40°F (–40°C) or other ﬂ uid conforming to

military speciﬁ 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.

Motor/Hydraulic Speciﬁ cations

12V DC with +/– connection

4.5" dia 1.5 kW motor

2200–2300 psi pump relief valve

4000 psi angling relief valve

.000477 gal/rev pump

Hydraulic Hose 1/4 SAE 100R1 and 3/8 SAE 100R17

HYDRAULIC SYSTEM

CAUTION

Do not mix diﬀ 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.

PRODIGY™ FloStat® HYDRAULIC SYSTEM SPECIFICATIONS

Vehicle Control Harness Fuses

3-Port Module (mini)

• Control and Park/Turn = 10A

Hydraulic Unit Harness Fuses

All (mini)

• 5A

Fastener Torque Speciﬁ cations

Pump Cap Screws 5/16-18 x 2-1/2 150–160 in-lb

Motor Terminals (+ and –) 5/16-18 Nut 50–60 in-lb

Motor to Manifold Cap Screws 1/4-20 x 6-1/4 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

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 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

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 1/4 90–100 in-lb

Plow Module Mount Screws 1/4-20 x 5/8 60–70 in-lb

Angle Ram Gland Nuts 150–180 ft-lb

Lit. No. 48174, Rev. 03 April 15, 2021

16

HYDRAULIC UNIT COMPONENTS

HYDRAULIC SYSTEM

Breather

Fill Plug

Pump

Pump Shaft Seal

Filter

Pressure Test Port

Pump Relief Valve

Solenoid

Cartridge

Valves

Quill

Counterbalance

Valves

Crossover

Relief Valve

O-Ring

Magnet

Motor

Lit. No. 48174, Rev. 03 April 15, 2021

17

HYDRAULIC COMPONENT INSTALLATION

HYDRAULIC SYSTEM

Ram Seal Installation

1. Lubricate the seals and O-rings with hydraulic

ﬂ uid.

2. Slide the gland nut over the split-bearing end

of the rod to prevent damaging the seals.

3. Carefully reassemble the ram.

4. Insert a 0.012" feeler gauge between the front

surface of the cylinder tube face and the hex

of the gland nut. Tighten the gland nut until it is

snug against the feeler gauge.

5. Remove the feeler gauge and tighten

the gland nut an additional 1/4 turn. This

adjustment procedure will provide a torque of

150–180 ft-lb.

Cartridge & Check Valve Removal

It is possible to remove cartridges and check

valves from a hydraulic unit without draining the

hydraulic ﬂ uid from the reservoir.

1. Install the diagnostic harness (PN 29290-2)

following the instructions included with the kit.

2. Cycle through the control functions twice to

remove pressure in the hydraulic unit.

3. Slowly remove the breather from the top of the

hydraulic unit.

4. Either (a) completely drain the reservoir and

skip to Step 9, or (b) proceed with the following

instructions for removing hydraulic components

without completely draining the reservoir.

5. Install a 3/8" barb ﬁ tting into the top of the

reservoir tank.

6. Attach a hand-operated vacuum pump to the

barb ﬁ tting.

7. Using the vacuum pump, pull a vacuum of

approximately 5"–10" Hg.

Wear Ring

O-Ring

Gland Nut

Wiper RingSeal

8. You should now be able to remove cartridges

and check valves from the hydraulic unit with

minimal ﬂ uid loss. Maintain the vacuum until

the replacement cartridge/check valve has

been installed. Once the replacement part

has been installed, release the vacuum and

remove the 3/8" barb ﬁ tting.

9. Reinstall the breather and remove the

Diagnostic Harness according to the

instructions included with the kit.

Excerpts taken from Gland Nut Ram Seal Kits Service Literature (Lit. No. 28944, Rev. 01).

Lit. No. 48174, Rev. 03 April 15, 2021

18

HYDRAULIC SYSTEM

VALVE LOCATIONS

Quill

S3-C2

S3-C1

S1

Pump Relief Valve

S2-C1 Counterbalance

Valve 2

Counterbalance

Valve 1

Crossover Relief

Valve

Valve Type

S1 SV08-2004

S2 SVCV08-20

S3 SV08-47C

RV3 Pump Relief Valve (2250 psi)

CBV1 Counterbalance Valve CB10-30

CBV2

CRL Crossover Relief Valve (4000 psi)

Lit. No. 48174, Rev. 03 April 15, 2021

19

WIRING – 3-PORT MODULE

ELECTRICAL SYSTEM

NOTE: The isolation module and plug-in

harness are shown on the driver's side for

illustration purposes only. Location may be

diﬀ erent for the vehicle.

BAT

RED

BLK

RED

Battery

10A Fuses

(snowplow park/turn &

snowplow control)

Turn Signal

Configuration Plug

Typical Plug-In Harness

Vehicle Lighting

Harness

(11-pin)

Vehicle Control Harness

Vehicle

Headlamps

Park/Turn

Lamps

Vehicle

Headlamps

Park/Turn

Lamps

Factory Vehicle Harness

Vehicle Battery Cable

To Snowplow Control

To Switched

Accessory

Fire Wall

3-Port Module

(non-DRL or DRL)

CAUTION

On 2-plug electrical systems, plug

covers shall be used whenever the

snowplow is disconnected. Vehicle

battery cable is 12V unfused source.

Lit. No. 48174, Rev. 03 April 15, 2021

20

ELECTRICAL ASSEMBLY

ELECTRICAL SYSTEM

Harness C

Fuse* (1)

Harness B Fuse* (2)

Assemble coil

spacer with smaller

diameter facing out.

* 5A Mini

Automotive-Style Fuse

5/16"-18 Nut (2)

50–60 in-lb

#10-32 Nut (2)

max. 15 in-lb

5/16"-24 Nut (2)

max. 35 in-lb

S3-C2 from

B Harness

(inner coil)

S2-C1 from Harness C

S1 from Harness B

8" Red Cable

S3-C1 from

Harness C

(outer coil)

Snowplow

Battery Cable

Route harness B

along this side.

Red

Black

– +

Route harnesses A and C

along this side.

1/4"-20 x 5/8" Tapping Screw

(2) 60–70 in-lb

Install coils with printing

facing out.

Apply dielectric grease to all

spade and ring terminals.

Torque Speciﬁ cations

All Solenoid Valves 19–21 ft-lb

All Solenoid Coil Nuts 4–5 ft-lb

Motor Relay Terminals

Small 10–15 in-lb

Large 25–35 in-lb

Motor Terminals 50–60 in-lb

Harness A

Snowplow

Battery Cable

Route

harnesses

A and C

along

this side.

Route

harness B

along this

side.

Harness C

2 Solenoid

Harness B

2 Solenoid

1/4"-20 x 5/8"

Tapping Screw (2)

60–70 in-lb

Excerpts taken from Hydraulic Unit—Auto-Positioning Wing Blade Service Literature (Lit. No. 42884, Rev. 00).

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