Lit. No. 41298, Rev. 01 February 15, 2019
TABLE OF CONTENTS
INTRODUCTION ................................................................................................5
Recommended Tools ...................................................................................5
Available Service Items ...............................................................................5
SAFETY .............................................................................................................6
SPECIFICATIONS .............................................................................................9
Insta-Act
®
Hydraulic System Specifi cations ................................................9
ATTACHING/DETACHING SNOWPLOW FROM VEHICLE ..........................10
OPERATIONAL TEST AND FINAL ADJUSTMENTS ....................................11
SYSTEM OVERVIEW ......................................................................................12
Headlamp Beam Aiming ............................................................................13
Hydraulic Hose Routing .............................................................................14
Hydraulic Unit .............................................................................................16
Hydraulic Component Installation ..............................................................17
HT Series™ Controls .................................................................................18
Hand-Held Control ..............................................................................19
SECURITY GUARD ™ Snowplow Anti-Theft System ..................21
Joystick Control .................................................................................. 23
SECURITY GUARD ™ Snowplow Anti-Theft System ..................25
Hand-Held Master Control for the SECURITY GUARD™ Snowplow
Anti-Theft System .............................................................................27
THEORY OF OPERATION ..............................................................................28
Snowplow Hydraulics .................................................................................28
3-Port Module Electrical ............................................................................28
ELECTRICAL & HYDRAULIC SCHEMATICS ................................................32
Legend — Electrical & Hydraulic Symbols ................................................32
Electrical Schematic — 3-Port Module ..................................................... 33
Electrical Schematic — 4-Port Module ......................................................37
Hydraulic Schematic ..................................................................................42
Raise — Electrical .................................................................................... 43
Raise — Hydraulic .................................................................................... 44
Lower / Float — Electrical ......................................................................... 45
Lower — Hydraulic .................................................................................... 46
Angle Right — Electrical ............................................................................47
Angle Right — Hydraulic ........................................................................... 48
Angle Left — Electrical ............................................................................. 49
Angle Left — Hydraulic ............................................................................. 50
Hold in Raise Position — Hydraulic ..........................................................51
Striking an Object While Plowing — Hydraulic ..........................................52
Scrape Lock Open .................................................................................... 54
TROUBLESHOOTING GUIDE ....................................................................... 55
How To Use the Troubleshooting Guide ................................................... 55
Electrical Testing ....................................................................................... 55
Before You Begin ...................................................................................... 56
Vehicle Headlamps ....................................................................................57
Snowplow Park/Turn Lamps ..................................................................... 58
Snowplow DRL Lamps ............................................................................. 59
Solenoid Coil Activation Test (SCAT) ........................................................ 60
Individual Solenoid Coil Test ......................................................................62
Control/Cable/Plow Module Test .............................................................. 63
Motor and Motor Relay Test ...................................................................... 64
Pump Pressure Test ................................................................................. 65
Blade Drop Speed Adjustment ................................................................. 66
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