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SnowEx Manuals
Snow Blower
LT
Mechanic's manual
SnowEx LT Mechanic's Manual
Straight blade snowplows
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Introduction
Recommended Tools
Available Service Items
Safety
Safety Definitions
Warning/Caution and Instruction Labels
Instruction Label
Safety Precautions
Hydraulic Safety
Fuses
Personal Safety
Cell Phones
Ventilation
Battery Safety
Noise
Blade, A‑Frame & Headgear
Installing the Emergency Transport Chain
Aiming Headlamp Beams
Hydraulic System
Straight Blades – Hydraulic System Specifications
Pump Motor Specifications
System Capacity
Fastener Torque Specifications
Hydraulic Unit Components
Valve Locations
Solenoid Cartridge Valves
Cartridge Valves
Blade Movement Functions
Check Valves
Relief Valves
Hydraulic Fitting and Hose Installation
To Install Hydraulic Hoses
Blade Drop Speed Adjustment
Cab Controls
Overview
Operating the Power Grip Hand‑Held Control
Function Time‑Outs
Automatic Shutdown
Control Functions
Operating the Joystick Control
Smooth Stop and One‑Touch FLOAT Features
Joystick Control Lever Movement
Raise, Lower, Float, Angle
Fleet Flex Electrical System
Smooth Stop
One‑Touch FLOAT
Enable/Disable Procedure
SECURITY GUARD Snowplow Anti-Theft System
Activation & Establishing a 4‑Digit Security Code
Manual Unlock
Clearing an Established 4‑Digit Security Code
Light Flash Indicators
Additional Notes
Hand‑Held Master Control
Universal Clear Security
Vehicle-Side Electrical Components
Harness Diagram - 3-Port Isolation Module
3‑Port Isolation Module Overview
Turn Signal Configuration Plug
Driver-Side Module
Passenger-Side Module
Snowplow Not Attached to Vehicle
Snowplow Attached to Vehicle
Scrape Maxx down FORCE ACCESSORY KIT
Installation Instructions
Operating Instructions
Enable or Disable Scrape Maxx Mode
Electrical & Hydraulic Schematics
Electrical Legend
Hydraulic Legend
Headlamps – Electrical/Harnesses
Vehicle Side
Plow Side
Headlamps: Typical Led Schematic
Led Plow Lights
Headlamps: Typical Dual‑Wire Halogen/Led Schematic
Headlamps: Dual‑Wire Halogen/Led Installation
Led Headlamps
Changing the Blade‑Edge Illumination Mode
Edgeview Lighting Connections
Electrical System Schematic – Straight Blade Snowplows
Hydraulic System Schematic – Straight Blade Snowplows
Attach Snowplow – Electric
System Response
Attach Snowplow – Hydraulic
Detach Snowplow – Electric
Detach Snowplow – Hydraulic
Raise — Electrical
Hold Blade in Raised Position
Raise — Hydraulic
Lower — Electrical
Lower — Hydraulic
Float — Electrical
Float — Hydraulic
Angle Right — Electrical
Angle Right — Hydraulic
Angle Left — Electrical
Angle Left — Hydraulic
Scrape Lock / While in Float — Hydraulic
Pump Pressure Relief
Striking an Object While Plowing – System Response
Angle Left Relief
Angle Right Relief
Float: Build down Force – Electric
Float: Maintain down Force – Electric
Float: Maintain down Force, Pump off – Hydraulic
Float: Maintain down Force, Pump on – Hydraulic
FLOAT: Blade Rises to Follow Surface – HYDRAULIC
Troubleshooting
How to Use the Troubleshooting Guide
Electrical Testing
Before You Begin
Vehicle Headlamps
Incorrect Operation or no Headlamps
Snowplow Headlamps
Snowplow Park/Turn Lamps
Incorrect Operation or no Park/Turn Lamps
Snowplow DRL Lamps
Incorrect Operation or no DRL Lamps
Vehicle Lighting Check
Headlamps
Joystick or Hand‑Held Control
Daytime Running Lights (Drls)
Solenoid Coil Activation Test (Scat)
SCAT Set‑Up
Off-Truck Testing
Perform the SCAT
Testing Double Stacked Coils
After Completing a SCAT Test
Individual Solenoid Coil Test
Control/Cable/Plow Module Test
To Safely Handle the Printed Circuit Board
Motor and Motor Relay Test
Harness Connections
Pump Pressure Test
Cartridge & Check Valve Removal
Relief Valve Inspection and Adjustment
Inspection
Adjustment
Scrape Lock Adjustment
Replacing Damaged Bearing Sleeves
Remove Damaged Bearing Sleeve
Insert New Bearing Sleeve
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Troubleshooting
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September 1, 2020
Lit. No. 72188, Rev. 01
SNOWPLOWS
MECHANIC'S GUIDE
RD, HD & LT STRAIGHT BLADE
SNOWPLOWS
CAUTION
Read this manual before servicing the snowplow.
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Summarization of Contents
INTRODUCTION
Recommended Tools and Service Items
Lists necessary tools and optional parts for snowplow service.
SAFETY
SAFETY DEFINITIONS AND LABELS
Defines symbols and explains the importance of warning and instruction labels.
SAFETY PRECAUTIONS
GENERAL, HYDRAULIC, AND PERSONAL SAFETY
Covers general, hydraulic, personal safety, and fire risks.
GENERAL SAFETY GUIDELINES
TORQUE CHART
Lists recommended torque values for fasteners.
BLADE, A-FRAME & HEADGEAR
EMERGENCY TRANSPORT CHAIN INSTALLATION
Instructions for securing the snowplow during transport.
AIMING HEADLAMP BEAMS
Procedure for aligning snowplow headlamp beams.
HYDRAULIC SYSTEM
SYSTEM SPECIFICATIONS
Details system capacity, fluid, and electrical specifications.
FASTENER TORQUE SPECIFICATIONS
Lists torque values for various hydraulic components.
HYDRAULIC UNIT COMPONENTS
Diagram and identification of hydraulic unit parts.
VALVE LOCATIONS
Identifies and locates solenoid cartridge valves on the unit.
CARTRIDGE VALVES AND BLADE MOVEMENT
Explains blade movement functions controlled by cartridge valves.
CHECK VALVES AND RELIEF VALVES
Describes the function, settings, and types of check and relief valves.
HYDRAULIC FITTING AND HOSE INSTALLATION
Provides instructions for installing fittings and hoses.
BLADE DROP SPEED ADJUSTMENT
Procedure for adjusting the blade drop speed.
CAB CONTROLS
OVERVIEW OF CONTROLS
Introduces hand-held and joystick controls and their functions.
OPERATING THE POWER GRIP™ HAND-HELD CONTROL
Detailed instructions for using the hand-held control.
OPERATING THE JOYSTICK CONTROL
Detailed instructions for using the joystick control.
FLEET FLEX ELECTRICAL SYSTEM
SMOOTH STOP AND ONE-TOUCH FLOAT FEATURES
Explains and details how to enable/disable these features.
SECURITY GUARD™ ANTI-THEFT SYSTEM ACTIVATION
Covers activation and code establishment for the anti-theft system.
VEHICLE-SIDE ELECTRICAL COMPONENTS
HARNESS DIAGRAM – 3-PORT ISOLATION MODULE
Illustrates the wiring harness connections for the isolation module.
3-PORT ISOLATION MODULE OVERVIEW
Explains the function and operation of the isolation module.
SCRAPE MAXX™ DOWN FORCE ACCESSORY KIT
OVERVIEW AND INSTALLATION
Explains the purpose, function, and installation of the Scrape Maxx accessory.
OPERATING INSTRUCTIONS
How to enable, disable, and activate Scrape Maxx mode.
ELECTRICAL & HYDRAULIC SCHEMATICS
OVERVIEW AND LEGENDS
Explains schematics, electrical, and hydraulic symbols.
TYPICAL LED PLOW LIGHT, HCM, AND HARNESS DIAGRAM
Illustrates the system for LED plow lights and Headlamp Control Module.
TYPICAL DUAL-WIRE SCHEMATIC
Detailed schematic for halogen/LED plow lights and connections.
TROUBLESHOOTING
HOW TO USE THE TROUBLESHOOTING GUIDE
Instructions on how to effectively use the troubleshooting section.
ELECTRICAL TESTING
Guidance on using test lights and ohmmeters for electrical diagnostics.
BEFORE YOU BEGIN
Essential steps to perform before troubleshooting.
VEHICLE HEADLAMPS
Troubleshooting steps for vehicle headlamp issues.
SNOWPLOW HEADLAMPS
Troubleshooting steps for snowplow headlamp issues.
SNOWPLOW PARK/TURN LAMPS
Troubleshooting steps for park/turn lamp issues.
SNOWPLOW DRL LAMPS
Troubleshooting steps for DRL lamp issues.
VEHICLE LIGHTING CHECK
Procedures for checking vehicle and snowplow lighting operations.
SOLENOID COIL ACTIVATION TEST (SCAT)
Test to identify electrical or hydraulic problems with solenoid coils.
INDIVIDUAL SOLENOID COIL TEST
Steps to test individual solenoid coils using an ohmmeter.
CONTROL/CABLE/PLOW MODULE TEST
Tests for issues with control module communication and power.
MOTOR AND MOTOR RELAY TEST
Procedures to test the motor and its relay when the motor doesn't run.
PUMP PRESSURE TEST
How to test pump pressure and troubleshoot low pressure.
RELIEF VALVE INSPECTION AND ADJUSTMENT
How to inspect and adjust relief valves.
SCRAPE LOCK ADJUSTMENT
Procedure to adjust the scrape lock pressure setting.
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