Douglas Dynamics SnowEx Liqui Maxx Operating instructions

May 15, 2017
Lit. No. 76348, Rev. 01
Liqui Maxx™ Sprayer Systems
Owner's Manual and Installation Instructions
Original Instructions
This manual and instructions are for Liqui Maxx Sprayer Systems
with serial numbers beginning with 160518 and higher.
This document supersedes all editions with an earlier date.
CAUTION
Read this document before operating
or servicing the equipment.

Lit. No. 76348, Rev. 01 3 May 15, 2017
TABLE OF CONTENTS
PREFACE.................................................................... 4
Warranty Registration ........................................... 4
Owner's Information Form .................................... 4
SAFETY ...................................................................... 5
Safety Denitions.................................................. 5
Warning/Caution Labels ....................................... 5
Serial Number Label ............................................. 6
Safety Precautions................................................ 6
Fuses .................................................................... 7
Personal Safety..................................................... 7
Fire and Explosion ................................................ 8
Cell Phones........................................................... 8
Ventilation ............................................................. 8
Battery Safety ....................................................... 8
Torque Chart ......................................................... 8
LOADING .................................................................... 9
Certication........................................................... 9
Specications........................................................ 9
INSTALLATION INSTRUCTIONS ............................ 10
Installation and Removal..................................... 10
Control Box Mounting ......................................... 12
RoadMaster™ Wiring Diagram ........................... 13
Installation........................................................... 14
Mounting the Display Console & Switches... 14
Electrical Installation .................................... 15
RoadMaster Section Connections................ 15
Speed Sensor Installation ............................ 16
RC-1B Installation ............................................... 16
Wiring Diagram............................................. 16
Battery Connections..................................... 16
FILLING .................................................................... 17
First Time Filling.................................................. 17
Routine Filling ..................................................... 17
Wet Seal Pump............................................. 17
Gasoline ....................................................... 17
Adding Brine................................................. 17
OPERATING & CALIBRATION INSTRUCTIONS ... 19
Control Operation ............................................... 19
Deluxe RoadMaster Control ......................... 19
Standard RC-1B Control............................... 20
RoadMaster Console Functions ......................... 21
Rotary Switch Position Functions................. 21
Calibration Positions..................................... 21
Soft Key Functions ....................................... 21
Calibration...........................................................22
Entering Calibration Values ..........................22
"Special" Calibration ........................................... 25
Entering Calibration Values .......................... 25
Console Switches & Buttons............................... 29
Section Switches..........................................29
Resetting System Counters..........................30
Model RC-1B Standard Sprayer Control............. 31
Sprayer Console........................................... 31
Spray Boom Operation ....................................... 31
Wing Spray Nozzle Selection....................... 31
Downward Spray Nozzle Selection .............. 32
Nozzle Alignment ......................................... 32
Default Control Settings...................................... 32
Deluxe Control.............................................. 32
Application Rates................................................33
Manual Mode................................................ 33
Calculations ........................................................34
Equations......................................................34
Conversions..................................................34
Example Calculation..................................... 35
MAINTENANCE........................................................36
Periodic Maintenance ......................................... 36
Cleaning..............................................................36
End of Season & Storage ...................................36
Nozzle Maintenance ...........................................36
TROUBLESHOOTING.............................................. 37
TROUBLESHOOTING – DELUXE CONTROL ........38
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.

Lit. No. 76348, Rev. 01 4 May 15, 2017
PREFACE
This manual has been prepared to acquaint you with
the safety information, operation, and maintenance of
your new machine. Improper installation and operation
could cause personal injury and/or equipment and
property damage. Read and understand the Owner's
Manual before installing, operating, or making
adjustments. Keep this manual accessible.
When service is necessary, call SnowEx®Technical
Service at 1-800-SALTERS (725-8377).
NOTE: This unit is designed to be used with
salt brine; the use of additives may impact
performance.
NOTE: Do not modify or alter the machine.
Altering the unit in any way will void the warranty.
The Liqui Maxx™ Sprayer System is designed to apply
brine to pre-treat, anti-ice, and post-treat parking lots
and roadways. Each Liqui Maxx unit consists of a
holding tank, pumping system and control, and a spray
boom.
OWNER'S INFORMATION
Owner's Name: ______________________________________________________________________
Date Purchased: _____________________________________________________________________
Outlet Name: ______________________________________________ Phone:_________________
Outlet Address: ______________________________________________________________________
Vehicle Model: _______________________________________________ Year: _______________
Equipment Model: ____________________________________ Serial #:______________________
Length:________________________ Weight: __________________ lb/kg: _________________
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.
Standard Control – Texas Industrial Remcor Inc
The standard version of the control has the ability
to turn the sprayers ON and OFF and increase or
decrease the pressure of the system from the cabin.
Deluxe Control – Micro-Trak RoadMaster™
The deluxe version of the control unit has many
features that include: push-button controls, application
rate adjustment and selection, automatic and manual
control modes, visual and audio alarms, and a blast
function for spot applications.
A separate GPS unit is offered that incorporates the
vehicle speed to automatically adjust the ow rate
and maintain the desired application rate. The deluxe
control is also compatible with some vehicle speed
sensors that can replace the GPS unit. Consult your
vehicle owner's manual for more information.
WARRANTY REGISTRATION
Warranty registration is available online at
www.snowexproducts.com. Under "Support" click
"Warranty Registration" and submit the form online.

Lit. No. 76348, Rev. 01 5 May 15, 2017
SAFETY
SAFETY DEFINITIONS
NOTE: Indicates a situation or action that can lead
to damage to your sprayer and vehicle or other
property. Other useful information can also be
described.
Both Sides
WARNING
Indicates a potentially hazardous situation
that, if not avoided, could result in death or
serious personal injury.
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/CAUTION LABELS
Become familiar with and inform users about the
warning and caution labels on the machine.
If labels are missing or cannot be read, call
1-800-SALTERS (725-8377).

Lit. No. 76348, Rev. 01 6 May 15, 2017
SAFETY
Code Denition
YY 2-Digit Year
MM 2-Digit Month
DD 2-Digit Day
LL 2-Digit Location Code
XXXX 4-Digit Sequential Number
ZZZZZZ Model #
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
• Before working with the equipment, secure all
loose-tting clothing and unrestrained hair.
• Before operating the sprayer system, verify
that all safety guards are in place.
• Always shut off vehicle before attempting to
attach, detach, or service sprayer system.
• Never attempt to take a unit off a truck with
liquid in it.
• Do not climb into or ride on the machine.
WARNING
Securely bolt and strap unit into place on the
vehicle bed using the optional UMK-200 bolt
kit and ratchet straps or similar. Unit must
be strapped down and bolted into position
before operating or transporting.
WARNING
Vehicle handling and characteristics will
change with the unit installed. Avoid any
sudden steering maneuvers, starts, or stops
that could create sloshing and instability.
WARNING
Always make sure personnel are clear of
areas of danger when using equipment.
Maintain 60' distance from all bystanders
when operating the sprayer system.
WARNING
Overloading could result in an
accident or damage. Do not exceed
GVWR or GAWR ratings as found
on the driver-side vehicle door
cornerpost. See Filling section to determine
maximum volumes of spraying material.
SERIAL NUMBER LABEL

Lit. No. 76348, Rev. 01 7 May 15, 2017
SAFETY
WARNING
Do not install the control for this product in
the deployment path of an air bag. Refer to
vehicle manufacturer's manual for air bag
deployment area(s).
WARNING
Inspect the unit periodically for defects. Parts
that are broken, missing, or worn out must be
replaced immediately. Do not alter any part of
the unit without prior written permission from
the manufacturer.
CAUTION
Brine is typically a clear to cloudy white
liquid with no odor. It may be irritating to the
eyes, skin, and respiratory system. For more
safety information on brine and other de-icing
materials, refer to the manufacturer's Material
Safety Data Sheet (MSDS).
CAUTION
Do not leave material in the unit for long
periods of time.
CAUTION
During the sprayer system installation
we recommend the addition of an OSHA
compliant Backup Alarm. This alarm is
required for OSHA governed employers.
CAUTION
• Do not operate a sprayer system in need of
maintenance.
• Before operating the sprayer system,
reassemble any parts or hardware removed
for cleaning or adjusting.
• Before operating the sprayer system,
remove materials such as cleaning rags,
brushes, and hand tools from the unit.
• Before operating the sprayer system, read
the engine owner's manual, if so equipped.
• While operating the unit, use auxiliary warning
lights, except when prohibited by law.
• Tighten all fasteners according to the
Torque Chart. Refer to Torque Chart for the
recommended torque values.
NOTE: Lubricate grease ttings after each use.
Use a good quality multipurpose grease.
FUSES
The electrical system contains several blade-style
automotive 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.
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 sprayer system.
• Do not wear jewelry or a necktie, and secure long
hair.
• Wear safety goggles to protect your eyes from
brine, battery acid, gasoline, dirt, and dust.
• Do not eat, drink, smoke, rub your eyes, or touch
bare skin while spraying.
• Never point spray gun at people or animals.
• 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.
CAUTION
Disconnect electric and/or hydraulic power
and tag out if required before servicing or
performing maintenance.

Lit. No. 76348, Rev. 01 8 May 15, 2017
1/4-20 10
91
54
1/4-28 12
11
71
5/16-1
81
50 212
5/16-2
41
70 240
3/8-16 269 376
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
SAFETY
TORQUE CHART
CAUTION
Read instructions before assembling.
Fasteners should be nger tight until
instructed to tighten according to the Torque
Chart. Use standard methods and practices
when installing equipment, including proper
personal protective safety equipment.
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 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
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.
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
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. 76348, Rev. 01 9 May 15, 2017
LOADING
Liqui Maxx™ Sprayer System
Tank Model TSA-300 TSA-500 TSA-750 TSA-1250
Capacity (gal) 300 500 750 1250
Tank and Pump
Dimensions (in)
Length 101 112 118 119
Width 53 59 75 85
Height 24 48 55 73
Empty Unit Weight (lb) 500 600 700 1000
Full Unit Weight (lb) 3500 5600 8200 13500
Suggested Gross Vehicle
Weight Rating (GVWR) (lb) 8,500–10,000 14,000–16,000 16,000–19,500 19,500–26,000
Vehicle Class Class 2B Class 4 Class 5 Class 6
SPECIFICATIONS
This Owner's Manual covers vehicles that have been
recommended for carrying the sprayer system. Please
see your local dealer for proper vehicle applications.
CERTIFICATION
WARNING
Overloading could result in an accident or
damage. Do not exceed GVWR or GAWR as
found on the driver-side cornerpost of vehicle.
WARNING
New untitled vehicle installation of a sprayer
system requires National Highway Trafc
Safety Administration altered vehicle
certication labeling. Installer to verify that
full sprayer does not exceed GVWR or GAWR
rating label and complies with FMVSS.
CAUTION
Read and adhere to manufacturer's
ice-control material package
labeling, including Material Safety
Data Sheet requirements.

Lit. No. 76348, Rev. 01 10 May 15, 2017
2. Connect the hose underneath the unit: Securely
fasten the 90° elbow connection to the tank
bulkhead tting underneath the unit. Make sure
the bulkhead tting is securely fastened to the
tank to prevent leaks. Run the 2" hose from the
elbow to the shut-off valve below the pump. Clock
the 90° elbow so that the hose remains free
of kinks; cut it to length. Clamp the hose using
two (2) clamps on each end to prevent leaks. In
low temperatures, warming the hose may ease
installation. Dip the hose in hot water or carefully
use a heat gun for 20–40 seconds.
3. Connect the return valve to the 2" bulkhead
connection on the pump side of the brine tank.
Securely fasten the 45° connections to the tank
bulkhead tting and the return valve. Make sure
the bulkhead tting is securely fastened to the
tank to prevent leaks. Clock the 45° connections
so that the hose remains free of kinks, and cut
the 1-1/2" hose to length. Clamp the hose using
two (2) clamps on each end to prevent leaks.
4. Connect the bypass line to the 3/4" bulkhead
connection on the pump side of the brine tank.
Securely fasten the 90° elbow to the tank
bulkhead tting. Make sure the bulkhead tting
is securely fastened to the tank to prevent leaks.
Clock the 90° elbow so that the hose remains free
of kinks, and cut the 1/2" hose to length. Clamp
the hose tightly to prevent leaks.
INSTALLATION AND REMOVAL
NOTE: To prevent leaks, use a thread sealing
compound on all threaded connections. Do
not use Teon®tape, as fragments will clog the
spray nozzles. Clamped connections may require
periodic retightening.
1. Bolt the pump and tank platforms together
(6 places).
INSTALLATION INSTRUCTIONS
Teon ®is a registered trademark of E. I. du Pont de Nemours and Company.
WARNING
Always shut off vehicle before attempting to
attach, detach, or service spray system.
WARNING
Never attempt to take a unit off a truck with
liquid in it.
Shut-Off Valv
e
90° Elbow
WARNING
Overloading could result in an
accident or damage. Do not exceed
GVWR or GAWR ratings as found
on the driver-side vehicle door
cornerpost. See specications to determine
maximum volumes of spraying material.
WARNING
New untitled vehicle installation of a sprayer
system requires National Highway Trafc
Safety Administration altered vehicle
certication labeling. Installer to verify that
full sprayer does not exceed GVWR or GAWR
rating label and complies with FMVSS.

Lit. No. 76348, Rev. 01 11 May 15, 2017
INSTALLATION INSTRUCTIONS
5. Lift the main tank and pump assembly using the
fork lift pockets. Use caution when inserting forks.
Improper insertion may puncture or damage the
brine tank and tubing routed underneath the unit.
Center the tank and pumping system from driver
to passenger side on top of the truck bed and
lower into position.
6. Install any optional kits and equipment. To install
the BRM-175 Adjustable Boom Receiver Mount,
unfasten the rear brake light, install the kit, and
re-install the light on the top rear face of the BRM
bracket.
7. Securely bolt and strap unit into place on the
vehicle bed using the optional UMK-200 Universal
Mounting Kit or similar brackets and ratchet
straps. Hardware attaching the sprayer system
directly to the vehicle is the responsibility of the
end user.
NOTE: Pay special attention when drilling or
clamping dissimilar metals to aluminum bodies.
Galvanic corrosion can occur if not handled
properly. Contact vehicle manufacturer for
recommended attachment practices.
8. Measure the distance between front of the truck
bed and the tank base. Make a spacer to ll
between the tank base and the front of the truck
bed. Failure to install this spacer could result in
damage to the sprayer and/or vehicle.
9. Install the boom so the nozzles measure
18"–22" from ground to nozzle tip. This is to
prevent damage and ensure optimal performance.
Consider using the optional BRM-175 Adjustable
Boom Receiver Mount if the tips of the nozzles lie
outside this zone when using your stock receiver
hitch.
10. Connect the boom to the pump. Clamp the quick
disconnect attachments on the boom hoses to the
manifold valves on the pumping unit. Route the
hoses to the installed boom with adequate slack
and cut the hoses to t. Clamp the hose tightly to
the boom to prevent leaks.
11. Fill the pump's antifreeze reservoir with a mixture
of 50% ethylene-glycol and 50% water. The seal
should be completely submerged. Check mixture
every 8 hours of operation and each time the
gasoline tank is lled. See lling instructions.
Fit to Vehicle
Fit to
Vehicl
e
CAUTION
Ensure nozzles have minimum 18 inches
ground clearance. Low boom heights can
cause accidental breakage from curbs,
uneven surfaces, and other obstacles.
Adjustment may require optional BRM-175
Adjustable Boom Mount.
18"–22"
2 3
1
1
2
3

Lit. No. 76348, Rev. 01 12 May 15, 2017
4. Connect the harness and the control power cable
to the back of the control and mount the control in
a suitable location within easy reach of the vehicle
operator without restricting access to the vehicle
controls and instruments.
5. Connect the harness to the battery. Refer to the
wiring diagrams for battery connections.
INSTALLATION INSTRUCTIONS
CONTROL BOX MOUNTING
NOTE: Use dielectric grease to prevent corrosion
on all connections.
Before beginning the installation, remove all battery
cables from the vehicle battery terminals.
1. Route the control box harness along the vehicle
frame. Do not route it close to the exhaust system
or engine, where extreme heat could melt the
wiring insulation and short out the sprayer and
vehicle electrical systems. Attach the harness to
frame holes and frame supports. Do not attach
to fuel or brake lines. Use heavy duty cable ties
or frame clamps to fasten the harness along the
frame.
2. Lay out the control power cable along the re
wall and fender well. Do not connect the power
leads to the battery yet.
3. Route the control power cable and harness using
an existing access hole through the re wall
into the vehicle cab. If adding an access hole is
necessary, check the area on the other side of the
re wall to make sure you will not drill into vehicle
wiring or other components.
CAUTION
Before drilling holes, check to see that no
vehicle wiring or other components could be
damaged.
WARNING
Do not install the control for this product in
the deployment path of an air bag. Refer to
vehicle manufacturer's manual for air bag
deployment area(s).
CAUTION
Do not mount the control close to any heater
vents or in areas prohibited by the vehicle
manufacturer for crashworthiness. See
the vehicles body builder's book, owner's
manual, or service manual for details.
CAUTION
Do not alter, modify, or install component in
shaded areas shown below. Failure to comply
may interfere with airbag deployment or
cause injury to operator in an accident.

Lit. No. 76348, Rev. 01 13 May 15, 2017
RoadMaster™ WIRING DIAGRAM
INSTALLATION INSTRUCTIONS
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.

Lit. No. 76348, Rev. 01 14 May 15, 2017
Console Mount Kit Illustration 1
INSTALLATION
Mounting the Display Console & Switches
Select a mounting location that is convenient to reach
and highly visible to the operator. Do not install in a
position that obstructs the view of the road or work
area. Whenever possible, avoid locations that expose
the console to direct sunlight, high temperature,
strong chemicals, or rain.
Place the mounting bracket in the selected location,
mark holes, drill 1/4" (7 mm) holes and mount bracket
with bolts, lock washers, and nuts provided. (Use self-
tapping screws if not practical to use bolts.)
See Illustration 1.
Put rubber washers on carriage bolts and put the
bolts through the bracket holes from the inside out.
Place console over carriage bolt heads.
Install the switch brackets over the carriage bolts
and alongside the console bracket. Install the mount
knobs on the carriage bolts and tighten to secure the
console and switch brackets in place.
See Illustrations 2 & 3.
Install the switches in the brackets, making sure that
the "ON" position is oriented up. Attach the quick
disconnects on the switch harnesses to the switches
(see wiring diagram). Then install the switch harness
connectors into the mating connectors on the console
harness. Typically the power ON/OFF switch is
mounted on the left and the RUN/HOLD switch is
mounted on the right.
Drill 1/4" (7 mm)
holes for bolts,
or 3/16"
(5 mm)
holes for self-
tapping screws.
Bolts
Lock Washers
and Nuts
Console ON/OFF Switch Illustration 2
Console RUN/HOLD Switch Illustration 3
INSTALLATION INSTRUCTIONS

Lit. No. 76348, Rev. 01 15 May 15, 2017
NOTE: The RoadMaster™must be connected to a
12-volt DC negative ground electrical system.
Power/Battery Connection
Locate the power cable for the RoadMaster and route
to the battery. When routing cable to console, avoid
areas where the cable may be subject to abrasion
or excessive heat. Attach the BLUE wire (ground)
to a screw or bolt on the equipment frame. See
Illustration. Be sure there is clean metal-to-metal
contact. Connect the ORANGE wire to the positive
battery terminal.
RoadMaster Section Connections
Section Shut-off Valves
Locate labeled section valve connectors 10' Flow/
Control/Section Harness. Connect these connectors
to corresponding valves. Apply silicone grease to
valve connections to avoid corrosion.
Connect the power to the RoadMaster console by
plugging the 2-pin W/P tower on the power cable into
the 2-pin W/P shroud of the display console.
INSTALLATION (CONT.)
Electrical Installation
Hot
(ORANGE)
10-Amp In-line
Fuse Required
Ground
(BLUE)
+12V DC
(RED)
+12V
GND
ON/OFF SIG.
Section Connectors Wiring Detail
10' Flow/Control/Section Harness Wiring
NOTE: When using the system in LANE MODE,
Section 2 denes the Lane Width. If only using
one section valve, connect the Section 2
connector to it and use the Section 2 (center)
switch on the console to control it.
INSTALLATION INSTRUCTIONS
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.

Lit. No. 76348, Rev. 01 16 May 15, 2017
INSTALLATION (CONT.)
Speed Sensor Installation
Installation Note: The harness provides local
connection for the speed sensor. For speed sensor
installations on implements, add 3-pin extension
cables as required.
Please Note: If you have purchased an Astro GPS
Speed Sensor, a Vansco radar or other radar or GPS
speed sensor, install the Astro, the Vansco, or other
radar as described in the instructions included with the
unit.
Speed Sensor Options
In addition to the standard Hall-effect magnetic speed
sensor, the RoadMaster™ may be interfaced with a
variety of other speed sensing equipment. Several
options are listed below.
Astro Series or Other GPS Speed Sensor
Interfaces
The RoadMaster may also be used with most GPS
speed sensors that output a pulsed signal, such as
the Micro-Trak Astro 5, SkyTrak or Dickey-John GPS
speed sensors. An adapter cable may be required.
Installing External BLAST Switch
An optional external Momentary ON BLAST switch
can be connected to the two quick-connect terminals
provided on the harness (see Wiring Diagram). The
remote BLAST switch allows the operator to control
the BLAST function from a switch mounted on an
armrest or other convenient location.
RC-1B INSTALLATION
Wiring Diagram
Battery Connections
Important – Attach the red wire to the − post. The electrical
system must be 12 Volt. If the tractor has two 6 Volt
batteries, the red wire must be attached to the + post on
the battery that has the power cable to the tractor electrical
system. The brown wire can be attached to the − post on
the other battery or anywhere on the tractor frame. See
wiring diagram.
INSTALLATION INSTRUCTIONS
Astro 5 GPS Speed Sensor
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.

Lit. No. 76348, Rev. 01 17 May 15, 2017
ROUTINE FILLING
Wet Seal Pump
Fill the pump's antifreeze reservoir with a mixture of
50% ethylene-glycol and 50% water. Check mixture
every 8 hours of operation and when the gasoline tank
is lled. The reservoir should be at least 75% full, with
the seal completely submerged. See diagram.
Gasoline
Fill the motor with gasoline as needed.
Adding Brine
Fill the brine tank to the desired level using the steps
below. Use the markings on the tank for volume
reference. If lling is slow, check the intake lter. For
more info see the maintenance and troubleshooting
sections of this manual.
FILLING
Refer to the specications section to determine
sprayer weights and capacities.
FIRST TIME FILLING
1. Install the sprayer and any optional equipment.
See the installation section of this manual for
details.
2. Install or attach any other equipment that will be
on the vehicle while the sprayer will be in use
(step bumper, trailer hitch, snowplows, etc.) and ll
gas tanks.
3. Obtain the Gross Vehicle Weight Rating (GVWR),
Front Gross Axle Weight Rating (FGAWR), and
Rear Gross Axle Weight Rating (RGAWR) from
the certication label typically located inside the
driver-side door.
4. With the occupants in the truck for normal sprayer
operation, weigh the vehicle to obtain gross
vehicle weight (GVW).
5. Subtract the GVW from the GVWR to determine
the available material payload. For reference,
brine weighs approximately 10 lb/gal. For more
weight information see the specications section
of this manual or the material manufacturer's
specications.
WARNING
Always shut off vehicle before attempting to
attach, detach, or service spray system.
CAUTION
Starting the motor with no antifreeze
will damage the seal in the pump. Check
antifreeze levels before starting.
Gasoline
Antifreeze
Return Valv
e
Shut-Off Valve
Brine Fill Valve
Filter
WARNING
Overloading could result in an accident or
damage. Do not exceed GVWR or GAWR as
found on the driver-side cornerpost of vehicle.

Lit. No. 76348, Rev. 01 18 May 15, 2017
FILLING
Filling with an external pump
1. Connect ll hose to the brine ll valve. (Opening
the valves rst will cause standing brine in the
tank to ow out.)
2. Once hose is hooked up, open the brine ll and
shut-off valves.
3. Once the valves are open, begin pumping brine
from the holding tank using the external pump.
4. Fill to the desired level.
5. Close the brine ll valve. The shut-off valve must
be open for spraying.
Filling with the Liqui Maxx™ sprayer's pump
NOTE: This method only works when the brine
reservoir level is above the tank level. The pump
requires a gravity-fed start to remove standing
air in the piping. Once the pump is primed it will
function normally.
1. Connect ll hose to the brine intake valve.
Opening the valve rst will cause standing brine in
the mixing tank to ow out.
2. Once the hose is hooked up, open the brine ll
and return valves, and close the shut-off valve.
3. Once brine begins to ow in, start the motor.
4. Fill tank to desired level.
5. Close the brine ll and return valves and open the
shut-off valve.

Lit. No. 76348, Rev. 01 19 May 15, 2017
OPERATING AND CALIBRATION INSTRUCTIONS
CONTROL OPERATION
Deluxe RoadMaster™ Control
Follow the steps below to get started using your
deluxe control. Complete details and instructions
follow in this section.
1. Before spraying, consider what speed range
you wish to operate in and select and install the
appropriate nozzles using the application rate
charts in this manual. Note that the unit will not
function as intended outside these ranges.
2. Turn the power switch ON. The unit will display the
software version and the total hours of operation
for 1.5 seconds each. Be sure the control is set
to HOLD or the boom switches are set to OFF
before starting the Liqui Maxx™ sprayer's motor to
prevent unintentional spraying.
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.
WARNING
Always make sure personnel are clear of
areas of danger when using equipment.
Maintain 60' distance from all bystanders
when operating the spray system.
WARNING
Vehicle handling and characteristics will
change with the unit installed. Avoid any
sudden steering maneuvers, starts, or stops
that could create sloshing and instability.
WARNING
Before operating the sprayer, verify that all
safety guards are in place.
WARNING
Unit must be strapped down and locked into
position before operating or transporting.
CAUTION
Starting the motor with no antifreeze
will damage the seal in the pump. Check
antifreeze levels before starting.
The RUN/HOLD button is the master switch
to turn all sections ON and OFF. For example,
instead of using the individual section switches,
simply use the RUN/HOLD switch.
3. Set the valves to the spray conguration. Start the
Liqui Maxx sprayer's motor by turning the motor
ON, setting the appropriate choke, and pulling the
recoil start handle.
Spray conguration:
• Brine Fill Valve: Closed
• Shut-off Valve: Open
4. Select the spray mode by pressing the
AUTO/MAN button on the bottom left of the
control until the desired mode is displayed on the
top right of the control display. Select Automatic
Mode if you wish to have the control automatically
hold a target application rate and your unit has
a compatible speed sensor installed. If you are
doing driveways or other applications where it
is difcult to stay within a target speed range,
it may be desirable to use Manual Mode. If
speeds of 4–6 mph are desired, Manual Mode is
recommended.
Automatic Mode
1. During normal operation, set the rotary switch to
RATE to see the actual application rate per acre.
The unit will automatically adjust to the target
application rate which can be seen and adjusted
using the Up (+) and Down (−) arrow buttons on
the control. Use the RUN/HOLD button and the
boom switches to control the boom as desired.
The factory defaults below can be adjusted as
desired. See "Entering Calibration Values" in this
section.
Factory Defaults:
• Target Application Rate: 30
• Rate Increment: ± 5
• Units: Gallons/Acre
The Automatic Mode has a BLAST function
intended for spot application that requires a higher
application rate like bridges or intersections.
This can be changed to any value and it is not
associated with the standard application rate. See
"Entering Calibration Values" in this section.

Lit. No. 76348, Rev. 01 20 May 15, 2017
OPERATING AND CALIBRATION INSTRUCTIONS
Factory Defaults:
• Blast Target Rate: 35
• Blast Duration: 5 seconds
• Units: Gallons/Acre
The control is also equipped with visual and
audio alarms. The alarms will trigger if the actual
application rate is above or below 10% of the
target rate. For more information on the alarms
and other control features see "RoadMaster™
Console Functions" in this section.
2. To avoid draining the vehicle battery, turn the
control OFF when not in use.
3. When nished turn the motor OFF.
NOTE: The unit cannot automatically adjust the
application rate unless there is a compatible
speed sensor installed.
Manual Mode
NOTE: In this mode the control will not
compensate for speed.
1. During normal operation, set the rotary switch to
VOLUME/MINUTE to see the ow rate. This value
can adjusted using the Up (+) and Down (−) arrow
buttons on the control. Use the RUN/HOLD button
and the boom switches to control the boom as
desired.
Factory Defaults
• Units: Gallons/Acre
2. To avoid draining the vehicle battery, turn OFF the
control when not in use.
3. When nished turn the motor OFF.
RoadMaster™ is a trademark of Micro-Trak Systems, Inc.
Standard RC-1B Control
Follow the steps below to get started using your
standard control. See the RC-1B Owner's Operating
Manual for complete details and instructions.
1. Before spraying, consider what speed range
you wish to operate in and select and install the
appropriate nozzles using the application rates
charts in this manual. Note that the unit will not
function as intended outside these ranges.
2. Set the master switch to OFF and turn the power
switch ON.
3. Set the valves to the spray conguration. Start the
Liqui Maxx™ sprayer's motor by turning the motor
ON, setting the appropriate choke, and pulling the
recoil start handle.
Spray Conguration:
• Brine Fill Valve: Closed
• Shut-off Valve: Open
• Return Valve: Set pressure to 40 psi by
opening and adjusting return valve.
4. During normal operation, use the master switch
and boom switches to control the boom as
desired. Increase or decrease the pressure of the
system as desired using the pressure switch.
5. To avoid draining the vehicle battery, turn OFF the
control when not in use.
6. When nished turn the motor OFF.