Western HTS Mechanic's Guide

Brand: Western

Model: HTS

Type: Mechanic's Guide

April 15, 2021

Lit. No. 41467, Rev. 01

MECHANIC'S GUIDE

HTS™ SNOWPLOWS

Featuring the

FloStat® Hydraulic System &

Isolation Module Light System

SNOWPLOWS

CAUTION

Read this manual before servicing the snowplow.

Lit. No. 41467, Rev. 01 April 15, 2021

TABLE OF CONTENTS

PREFACE ........................................................................................................ 2

SAFETY INFORMATION ............................................................................... 4

SPECIFICATIONS & REQUIRED TOOLS .................................................... 7

ATTACHING/DETACHING SNOWPLOW FROM VEHICLE & STORAGE 8

INSTALLING SNOWPLOW ............................................................................ 9

SYSTEM OVERVIEW ....................................................................................16

Vehicle Lighting Check .............................................................................16

Headlamp Beam Aiming ...........................................................................17

Hydraulic Hose Routing ............................................................................ 18

Hydraulic Unit Parts Diagram ...................................................................19

Solenoid Cartridge Valve Identiﬁ cation and Location ...............................20

Relief Valve Identiﬁ cation and Location ....................................................20

Hydraulic Component Installations ...........................................................21

HTS™ Controls .........................................................................................22

Hand-Held Control .............................................................................23

Joystick Control ..................................................................................27

Master Control for the SECURITY GUARD™ System .......................31

THEORY OF OPERATION .......................................................................... 32

3-PORT MODULE ........................................................................................ 32

Theory of Operation ................................................................................. 32

Wiring ....................................................................................................... 37

4-PORT MODULE .........................................................................................41

Theory of Operation ................................................................................. 41

Wiring ....................................................................................................... 42

ELECTRICAL & HYDRAULIC SCHEMATICS ............................................ 46

Hydraulic Schematic ................................................................................ 46

Raise ....................................................................................................... 47

Lower ...................................................................................................... 49

Angle Right .............................................................................................. 51

Angle Left ................................................................................................. 52

Hold in Raise Position ............................................................................. 53

Striking an Object While Plowing ............................................................. 55

Scrape Lock Function .............................................................................. 57

TROUBLESHOOTING GUIDE .................................................................... 59

PILOT-OPERATED (POPPET STYLE) CHECK VALVE INSPECTION ... 74

RELIEF VALVE INSPECTION AND ADJUSTMENT ................................. 75

PREFACE

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 attempting to service

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.

Lit. No. 41467, Rev. 01 April 15, 2021

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 INFORMATION

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.

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

INSTRUCTIONS

OFF

After lowering blade and turning

control OFF, disconnect electrical

connections.

Pull and hold Lock Pin out; then rotate Handle UP

and release Lock Pin. It must lock into UPPER

hole. Stand Hook must grip Receiver Pin.

Plug in electrical connections.

STEP 2 STEP 3

STEP 2 STEP 1

Handle

Stand Hook

(Pull)

Lock Pin

Receiver Pin

74593.01

Pull and hold Lock Pin out; then rotate Handle DOWN

and release Lock Pin. It must lock into LOWER hole.

Push top of Shoe DOWN; Shoe will be on the

ground.

MOUNTING PLOW (ON)

REMOVING PLOW (OFF)

US patents 6,941,685; 7,400,058; 7,430,821; 7,737,576; 10,793,056; CAN patents 2,354,257; 2,639,052; 2,843,990; and other patents pending.

STEP 1

STEP 3

Shoe

Handle

After seating plow horns in receiver brackets,

pull Handle UP. Shoe will lift off the ground.

Read Owner's Manual for complete instructions.

Warning and Caution Label

Instruction Label

Lit. No. 41467, Rev. 01 April 15, 2021

SAFETY INFORMATION

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 blade when vehicle is

parked. Temperature changes

could change hydraulic

pressure, causing the blade to

drop unexpectedly or damaging

hydraulic components. Failure

to do this can result in serious

personal injury.

WARNING

Remove blade assembly before

placing vehicle on hoist.

WARNING

Keep 8' clear of the blade when

it is being raised, lowered, or

angled. Do not stand between

the vehicle and blade or

directly in front of the blade.

If the blade hits or drops on

you, you could be seriously

injured.

WARNING

Keep hands and feet clear of

the blade and A-frame when

attaching or detaching the

snowplow. Moving or falling

assemblies could cause

personal injury.

WARNING

Do not exceed GVWR or GAWR

including blade and ballast.

The rating label is found on

the driver-side vehicle door

cornerpost.

CAUTION

Refer to the current eMatch

selection system for minimum

vehicle recommendations and

ballast requirements.

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.

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.

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.

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.

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.

WARNING

Hydraulic ﬂ uid under pressure

can cause skin injection

injury. If you are injured by

hydraulic ﬂ uid, get medical

attention immediately.

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.

Lit. No. 41467, Rev. 01 April 15, 2021

SAFETY INFORMATION

TORQUE CHART

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.

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

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

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

Metric Fasteners Class 8.8 and 10.9

These torque values apply to fasteners

except those noted in the instructions.

Torque (ft-lb)

Grade

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

VENTILATION

BATTERY SAFETY

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.

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.

Lit. No. 41467, Rev. 01 April 15, 2021

FloStat® Hydraulic System

NOTE: Remove breather/ﬁ ll plug

slowly to relieve any pressure in

reservoir.

Hydraulic Fluid

• WESTERN® High Performance

Fluid rated to –25°F (–32°C) or

other ﬂ uid conforming to Military

Speciﬁ cation MIL-H-5606A,

such as Mobil Aero HFA or Shell

AeroShell® Fluid 4.

Fluid Capacity

• Unit Reservoir = 1-1/2 quarts

• System Total = 2-1/4 quarts

Solenoid Valve Spool Travel =

0.07" for three- and four-way valves

(S2, S3). Travel of two-way valve (S1)

spool is not detectable with voltage

applied to coil.

CAUTION

Do not mix diﬀ erent kinds of

hydraulic ﬂ uid. Some ﬂ uids

are not compatible and may

cause performance problems

and product damage.

Tools required to service

the electrical and hydraulic

systems:

• long slender needle-nose pliers

• ﬂ at screwdriver

• deep socket: 7/8"

• 10 mm socket

• sockets and combination

wrenches: 5/16" thru 7/8",

1-1/16", 1-1/8"

• 1/4" socket or nut driver

• 12V test light

• torque wrench (in-lb / ft-lb)

• Allen wrench set

• 600 psi pressure gauge

w/adapter ﬁ ttings

Fastener Torque

SPECIFICATIONS

MUX Straight Blade w/Scrape Lock Hydraulic Unit Torque Chart

Location Fastener Size Torque

Pump Cap Screws 5/16-18 x 2-1/4 150–160 in-lb

Motor Terminals (+ and –) M6 Nut 25–35 in-lb

Motor to Manifold Cap Screws M5 x .8 35–45 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 48–60 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 22–25 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 3/8 75–85 in-lb

Plow Module Mount Screws 1/4-20 x 3/8 60–70 in-lb

* Torque with low-strength thread locker

Fluid Level

With the system attached to the

vehicle, activate the control. Lower the

blade to the ground and turn OFF the

control. Remove the ﬁ ll plug. Fill the

reservoir to within 2-1/2" of the top of

the ﬁ ll hole. Replace the ﬁ ll plug.

Electrical System –

approximate values:

• Solenoid Coil Resistance =

7 ohm at room temperature

• Solenoid Coil Amperage Draw =

1.5A

• Motor Relay Coil Resistance =

16–17 ohm

• Motor Relay Amperage Draw =

0.7A

• Motor Amperage Draw = 100A at

1650 psi ± 50 psi

• Switched Accessory Lead Draw

= 0.75A

3-Port Module

Vehicle Control Harness Fuse Size

• Park/Turn – 10A (mini)

• Control – 10A (mini)

4-Port Module

(automotive-style)

• Park/Turn – 15A

• Control – 7.5A

• 3000 psi pressure gauge

w/adapter ﬁ ttings

• ﬂ ashlight

• pick set

• hammer

• digital volt/ohm meter

• pencil magnet

• adjustable-pin spanner wrench

(capacity range 2-1/2", 1/4" pin dia.)

Available from your WESTERN® outlet:

• Hydraulic Pressure Test Kit

(PN 56679)

• Multiplexed Hyd. Diagnostic

Harness (PN 29290-2)

• Motor Bearing Sleeve Repair Kit

(PN 64589)

• Pump Shaft Seal Repair Kit

(PN 28856)

Lit. No. 41467, Rev. 01 April 15, 2021

ATTACHING / DETACHING SNOWPLOW FROM VEHICLE & STORAGE

HTS™ Attach / Detach Diagram NOTE: After each use of the

snowplow, reapply dielectric

grease to the electrical plugs to

maintain the protective coating on

the terminals.

NOTE: Multiplexed 2-plug systems

are equipped with plug covers.

Lit. No. 41467, Rev. 01 April 15, 2021

INSTALLING SNOWPLOW

BLADE TO A-FRAME

1. Remove the headlamp box and

small parts box from carton.

Remove carton wall sleeve

by sliding it up and over box

contents. Remove and discard

the four corner tubes and place

sleeve ﬂ at on the ﬂ oor. Remove

the (2) lag screws (located

on either side of the lift ram)

securing the A-frame to the

pallet.

NOTE: When the lift ram is pinned,

the lift frame can still rotate

forward when loaded. A relief

valve is built into the lift portion of

the hydraulic circuit.

3. Place the A-frame nose plate

over the quadrant pivot section.

Secure with one 1" x 9" cap

screw (pivot bolt) and a locknut.

Tighten locknut as much as

possible while allowing A-frame

and quadrant to pivot.

Insert 5/8" x 3-1/2"

clevis pin.

Insert the 5/8" x 3-1/2" clevis pin

through the top hole on the lift

frame to secure the base end

of the lift ram to the lift frame.

Remove the lift frame, A-frame

and power unit assembly from

the box and place it on the

carton sleeve.

2. Place some cardboard or wood

on the ﬂ oor where blade will be

assembled. Remove the blade

from the pallet and place it face

down.

1" x 9" Cap Screw

(pivot bolt) Locknut

1" x 3-1/4"

Clevis Pin 1" x 3-1/4"

Clevis Pin

4. Position the rod ends of the

two 8" rams in the brackets on

the back of the quadrant with a

1" x 3-1/4" clevis pin (installed

from the top down through

bracket) and secure with cotter

pin (not shown).

Lit. No. 41467, Rev. 01 April 15, 2021

INSTALLING STAND SHOE AND RECEIVERS

STAND SHOE

INSTALLATION

A ﬁ nal adjustment of stand shoe

will be made after attaching

snowplow to vehicle.

1. Do not cut the spring tie until

after ﬁ nal stand shoe adjustment.

2. 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, third

hole from the bottom.

3. Insert 1/4" roll pin.

RECEIVER INSTALLATION

1. Before assembling the receiver

to the vehicle undercarriage,

determine if the height

adjustment plate kits are needed.

2. Prior to measuring the vehicle

undercarriage height, the

undercarriage must be installed,

and ballast must be installed if

required. Park the vehicle on

a level surface. Measure the

distance from the ground to the

center of the receiver pin hole on

the undercarriage.

Roll Pin

Install roll pin,

third hole from

the bottom

Do not cut

spring tie

4. Pull and hold the lock pin out;

then rotate the handle DOWN

and release the lock pin. It must

lock into the LOWER hole. Push

down on top of the shoe. The

shoe will be on the ground.

5. Remove the support block from

under the main A-frame tube.

Center of

Receiver Pin Hole

Refer to the chart below to

determine if height adjustment

plates are required.

3. Use dimension "X" from Step 2

and follow the chart below:

Height Adjustment Plate

Selection Chart

Dimension

"X"

Height

Adjustment Plate

Kits Required

13.0"–15.5" No

15.5"–17.5" Yes

Lit. No. 41467, Rev. 01 April 15, 2021

INSTALLING RECEIVERS

4. If adapter plates are required,

install as follows:

Position an adapter plate on

each side of the receiver as

shown. Insert a 3/4" x 2-3/4" cap

screw through the lower front

adapter plate hole and through

the appropriate hole on the

receiver. Secure with a locknut.

Insert a cap screw through the

rear adapter plate hole, through

the slot on the receiver. Secure

with a locknut.

Repeat for the passenger's side.

Tighten all fasteners according to

the torque chart.

5. Position the receiver between

the mount brackets on each

side. Align the notches in rear of

the receiver with pins in vehicle

undercarriage. Rotate up and

secure with a 3/4" x 4-3/8" clevis

pin and hairpin cotter on each

side. If the height adjustment

plates are not used, insert the

spacer provided between the

receiver and the inner-most

mount bracket.

Adapter Plate

Receiver

3/4" x 2-3/4"

Cap Screws

Locknuts Adapter Plate

3/4" x 4-3/8"

Clevis Pin

Cotter

Spacer

Shown with adapter plate

installed.

Cotter

3/4" x 4-3/8"

Clevis Pin

Adapte

Plate

Shown without adapter plate.

Lit. No. 41467, Rev. 01 April 15, 2021

NIGHTHAWK™ HEADLAMPS

HEADLAMPS

Headlamps, hardware, and

instructions are found in the

headlamp box. Additional hardware

is found in the loose parts box.

3. Insert seven cable tie anchors

into 1/4" holes on the rear of

light bar from the inside, with the

locking tabs horizontal.

4. Install a split rubber grommet

on each headlamp wire 3" from

headlamp and insert grommet

and wire into slot on rear of light

bar.

5. Route the wires underneath

the light bar, behind the vertical

supports, and down along the

inside of the driver-side vertical

support, securing the wires to the

anchors with cable ties.

WARNING

Your vehicle must be

equipped with snowplow

headlamps and directional

lights.

Refer to ﬁ gure above for the following

instructions.

1. Remove the zip ties securing

light bar to lift frame.

2. With the wire harness behind the

lift frame, attach the headlamps

to the hole and slot in the light

bar by following the instructions

included with the headlamps.

Cable Ties

Plow

Battery

Cable

Grommet Headlamp Harness

Lit. No. 41467, Rev. 01 April 15, 2021

OPERATIONAL TEST AND FINAL ADJUSTMENT

FILLING HYDRAULIC UNIT 3. Replace with breather/ﬁ ll plug

(included in parts box).

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.

WARNING

Keep 8' clear of the blade

when it is being raised,

lowered, or angled. Do not

stand between the vehicle

and blade or directly in front

of the blade. If the blade hits

or drops on you, you could be

seriously injured.

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.

1. Attach the snowplow to the

vehicle according to the

instructions on the back of the

blade.

The HTS™ snowplow hydraulic

system comes pre-assembled,

ﬁ lled, and fully tested from the

factory.

2. Remove factory installed pipe

plug. Reservoir ﬂ uid level should

be within 2-1/2" from the top of

the ﬁ ll hole. If additional ﬂ uid is

needed, ﬁ ll the reservoir with

WESTERN® High Performance

Hydraulic Fluid or other

ﬂ uid conforming to Military

Speciﬁ cation MIL-H-5606A,

such as Mobil Aero HFA or Shell

AeroShell® Fluid 4.

Breather/

Fill Plug

Drain Plug

FLUID CAPACITY

• FloStat® Unit Reservoir 1-3/4 quarts

• FloStat System Total 2-3/8 to 2-3/4 quarts

Lit. No. 41467, Rev. 01 April 15, 2021

BLADE DROP SPEED

ADJUSTMENT

1. The plow drop speed may be

adjusted by turning the quill.

OPERATIONAL TEST AND FINAL ADJUSTMENT

WARNING

Keep 8' clear of the blade

when it is being raised,

lowered, or angled. Do not

stand between the vehicle

and blade or directly in front

of blade. If the blade hits or

drops on you, you could be

seriously injured.

3. Turn the quill inward (clockwise)

to decrease the drop speed.

Turn the quill outward

(counterclockwise) to increase

the drop speed.

4. Stand 8' clear of the blade when

checking adjustment.

NOTE: The blade will not drop

when quill is fully tightened

(clockwise). Turn OFF the plow

control, turn the quill 1/8 turn

outward (counterclockwise), then

proceed with blade drop speed

adjustment.

2. Lower the blade to the ground

before making adjustment.

Quill

Lit. No. 41467, Rev. 01 April 15, 2021

1-3/8" to 2-1/8"

Roll Pin 8-1/2" to 10-1/8"

Stand

Shoe

Stand

Arm

Stand Shoe

Stand Arm

OPERATIONAL TEST AND FINAL ADJUSTMENT

FINAL INSPECTION AND

ADJUSTMENT

1. Attach snowplow to the

vehicle mount. With snowplow

lowered to the ground and on

level pavement, measure the

dimension from the ground to the

bottom of the A-frame side tube.

This dimension must be 8-1/2" to

10-1/8".

2. With the snowplow attached and

on the ground, place the stand

arm in the lower position with

the lock pin engaged and with

the stand shoe fully retracted

in the "UP" position. Measure

the distance from the ground

to the bottom of the stand

shoe. This distance should be

1-3/8" to 2-1/8". The stand can

be adjusted to achieve this

dimension by removing the roll

pin and selecting the proper hole

in the stand stem. When the

stand height is correct, cut and

remove the spring tie.

3. Fully angle the blade in both

directions in raised and lowered

positions. Adjust hose ﬁ ttings,

wraps, and clamps so that hoses

do not contact vehicle bumper,

have no sharp bends, and are

wrapped at contact points with

the lift and A-frames.

Lit. No. 41467, Rev. 01 April 15, 2021

SYSTEM OVERVIEW

VEHICLE LIGHTING CHECK

1. Check the operation of vehicle

lights and then snowplow

lights with snowplow attached

to vehicle and all harnesses

connected.

Turn signals and parking lamps

Move vehicle headlamp switch to

the parking lamp "ON" position.

Parking lamps ON:

• Both vehicle and snowplow

parking lamps should be ON at

the same time.

Driver-side turn signal ON:

• Both vehicle and snowplow

driver-side turn signal lamps

should ﬂ ash at the same time.

Passenger-side turn signal ON:

• Both vehicle and snowplow

passenger-side turn signal

lamps should ﬂ ash at the same

time.

Headlamps

Move vehicle headlamp switch

to the ON position. Connecting

and disconnecting the headlamp

harness plug should switch

between vehicle and snowplow

headlamps as follows:

Headlamp harness plug

DISCONNECTED:

• Vehicle headlamps/parking

lamps should be ON.

• Snowplow headlamps/parking

lamps should be OFF.

Headlamp harness plug

CONNECTED:

• Snowplow headlamps/parking

lamps should be ON.

• Vehicle headlamps should be

OFF.

Dimmer switch should dim

whichever headlamps are

operating. The high beam

indicator on the dash should light

when either set of headlamps is

on high beam.

Daytime Running Lamps (DRLs)

For PN 29070-1:

• On vehicles equipped with DRLs

integrated into the vehicle

headlamps. Activation of the

switched accessory wire (a

key-controlled power source)

port C, position C, applies

battery voltage to the module's

high and low beam relay coils,

which causes the relay contacts

to shift from the "vehicle" to

the "snowplow" position. This

module will transfer the

vehicle headlamp DRLs to the

snowplow (turns oﬀ vehicle

DRLs).

• On vehicles equipped with

dedicated DRL bulbs or

vehicles using the turn signals

as DRLs, this module will not

turn OFF the vehicle bulbs.

While the vehicle is in the

DRL mode, this module will

illuminate the snowplow light

turn signal ﬁ laments.

Joystick Control or

CabCommand Hand-Held

Control

The control indicator light should

light whenever the control

ON/OFF switch and the ignition

(key) switches are both in the

ON position. The snowplow

plugs do need to be connected to

the vehicle harness connectors.

2. Check aim of vehicle headlamps

with snowplow removed.

3. Connect all snowplow and

vehicle harnesses. Raise the

snowplow and aim snowplow

headlamps according to the

Snowplow Headlamp Beam

Aiming instructions included with

the headlamps and any state or

local regulations.

4. When the snowplow is removed

from the vehicle, install plug

covers on the vehicle battery

cable and lighting harness. Insert

the snowplow battery cable and

lighting harness into the cable

boot on the snowplow.

CAUTION

On 2-plug electrical systems,

plug covers shall be used

whenever snowplow is

disconnected. Vehicle battery

cable is 12V unfused source.

Lit. No. 41467, Rev. 01 April 15, 2021

SYSTEM OVERVIEW

HEADLAMP BEAM AIMING

Torque headlamp fasteners to

45 ft-lb 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 vehicle for headlamp

aim or inspection. Before

checking beam aim, the

inspector will:

a. Remove ice or mud from

under fenders.

b. Set tire inﬂ ation pressures

to the values speciﬁ ed on

vehicle information label.

c. Check 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 eMatch selection

system.

e. Check functioning of any

automatic vehicle leveling

systems and speciﬁ c

manufacturer's instructions

pertaining to vehicle

preparation for headlamp

aiming.

f. Clean lenses.

g. Check for bulb burnout and

proper beam switching.

h. Stabilize suspension by

rocking vehicle sideways.

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.)

Vertical

Centerline

ahead of DS

Snowplow

Headlamp

Align with

vehicle

centerline

Vertical

Centerline

ahead 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

Lit. No. 41467, Rev. 01 April 15, 2021

HYDRAULIC HOSE – ROUTING SYSTEM OVERVIEW

To DS

Angle Ram

To PS

Angle Ram

To Lif t

Ram Base

To Lif t

Ram Rod

HOSE ROUTING FOR HTS™ BLADES

PS Ram

DS Ram

To Lif t Ram

Rod

To DS Ram

To PS Ram To Lif t Ram Base

Lit. No. 41467, Rev. 01 April 15, 2021

SYSTEM OVERVIEW – HYDRAULIC UNIT

FloStat® HYDRAULIC UNIT

The HTS™ hydraulic unit has blade

scrape lock circuitry built in. This

feature is activated when the blade

is in FLOAT. The HTS blade is raised

in approximately 4 seconds and

angled side to side in approximately

3 seconds.

Drain Plug

Quill

Reservoir

Valve Manifold

Breather/

Fill Plug

Motor

Sleeve Bearing

Pump Shaft Seal

Scrape Lock

Bypass Check Valve

Pump Pressure

Breather

Reservoir

O-Ring

Drain Plug

Suction Filter

Pump

Quill

PS Crossover Relief Valve

Solenoid Cartridge Valve

Solenoid Coil

Coil Nut

Poppet Check Valve Kit

Check Valve

Crossover Relief Valve

Valve Manifold Block

Motor

Magnet

Plate Baffle Retainer Clip

Inlet Fitting

Lit. No. 41467, Rev. 01 April 15, 2021

SYSTEM OVERVIEW – HYDRAULIC UNIT

SOLENOID CARTRIDGE VALVE

IDENTIFICATION & LOCATION

S2 S3

Solenoid Cartridge Valves

Relief Valve

Scrape Lock

Pump Relief

Valve

PS Plowing

Relief Valve

DS Plowing

Relief

Valve

RELIEF VALVE IDENTIFICATION & LOCATION

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Western HTS Mechanic's Guide

Western HTS Mechanic's Guide

Western HTS Mechanic's Guide

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