SnowEx RDV V-Plow Mechanic's Manual
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SnowEx RDV V-Plow Mechanic's Manual

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June 15, 2020
Lit. No. 30118, Rev. 00
SNOWPLOWS
MECHANIC'S GUIDE
for the
RDV™ V-Plow
CAUTION
Read this manual before servicing the snowplow.

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Summary of Contents for SnowEx RDV V-Plow

  • Page 1 June 15, 2020 Lit. No. 30118, Rev. 00 SNOWPLOWS MECHANIC'S GUIDE for the RDV™ V-Plow CAUTION Read this manual before servicing the snowplow.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ....................4 Electrical Schematic – RDV™ V-Plow ............33 Recommended Tools ...................4 Hydraulic Schematic – RDV V-Plow ............34 Available Service Items ................4 Raise ......................35 SAFETY ......................5 Lower/Float ....................37 Angle Right ....................39 Torque Chart ....................7 Angle Left ....................41...

  • Page 4: Introduction

    INTRODUCTION This guide has been prepared to assist the RECOMMENDED TOOLS AVAILABLE SERVICE ITEMS trained mechanic in the service of SnowEx ® RDV™ V-plows. It also provides safety information • Long/slender needle-nose pliers • Motor Bearing Sleeve Repair Kit: PN 52251 and recommendations.

  • Page 5: Safety

    CAUTION NOTE: If labels are missing or cannot be read, Indicates a potentially hazardous situation see your local SnowEx dealer. ® that, if not avoided, may result in minor Instruction Label or moderate injury.
  • Page 6 SAFETY SAFETY PRECAUTIONS FUSES WARNING To prevent accidental movement of Improper installation and operation could cause The electrical and hydraulic systems contain the blade, always turn the control OFF personal injury, and/or equipment and property several automotive-style fuses. If a problem should whenever the snowplow is not in use.

  • Page 7: Torque Chart

    SAFETY FIRE AND EXPLOSION BATTERY SAFETY TORQUE CHART WARNING CAUTION CAUTION Gasoline is highly fl ammable and gasoline Batteries normally produce explosive Read instructions before assembling. vapor is explosive. Never smoke while gases, which can cause personal injury. Fasteners should be fi nger tight until working on vehicle.

  • Page 8: Blade, T-Frame & Headgear

    BLADE, T-FRAME & HEADGEAR T-FRAME HOLE POSITION 2. Use distance "d" from Step 1 and the following IMPORTANT! Before assembling the headgear chart to determine the proper T-frame hole. to the T-frame, the T-frame hole position must be determined using the following procedure. T-Frame Hole Chart (If the truck is not available, use the middle Distance "d"...

  • Page 9: T-Frame To Blade Assembly

    BLADE, T-FRAME & HEADGEAR T-FRAME TO BLADE ASSEMBLY 1. Position the T-frame between the headgear 3. Fold the headgear forward and pin 4. If the T-frame was installed into the top hole, strut and inner ear, aligned with the appropriate the lift cylinder to the T-frame using a install the stacking stops using T-frame hole.
  • Page 10 BLADE, T-FRAME & HEADGEAR T-FRAME TO BLADE ASSEMBLY 1. Remove the blade wings from the crate. Remove the four shipping straps, then replace Pivot Pin the cutting edge hardware. 2. Align the hinges of each wing. Position the 1/2" x 2-7/8" T-frame assembly between the blade wings so Clevis Pins the holes in the T-frame are aligned with the...

  • Page 11: Center Defl Ector, Blade Guides, And Angle Ram Adjustment

    9. Install the blade guides with 5/16" x 1" cap 3/8" x 1-1/2" cap screws and 3/8" locknuts. screws and 5/16" locknuts, as shown. The RDV V-plow has adjustable angle rams with two possible mounting positions at the base end of each ram, nearest the vehicle. This feature...

  • Page 12: Using The Blade Spring Replacement Tool

    BLADE, T-FRAME & HEADGEAR USING THE BLADE SPRING REPLACEMENT TOOL 1. Park the vehicle on a smooth, level, hard 3. Place the tool on the top anchor above the 4. Use hand tools to tighten the 5/8" hex nut until surface, such as concrete.

  • Page 13: Hydraulic System

    • Motor Relay Amperage Draw = 3A • Pump Relief Valve (1): 2250 100 psi ± • Maximum Motor Amperage Draw = 190A over Use SnowEx Hydraulic Fluid to –40°F (–40°C) ® 1-3/4 turns CCW from fully seated relief at 2250 psi or other fl...

  • Page 14: Hydraulic Unit Components

    HYDRAULIC SYSTEM HYDRAULIC UNIT COMPONENTS Module Plate Plow Module Motor Relay Pressure Motor Switch Check Breather/Fill Plug Valves Valve Manifold Reservoir Motor Breather O-Ring O-Ring Coil Reservoir w/Spades Quill 2-Way Primary Valves Manifold Coil Relief w/Spades Valve 4-Way Valve Coil Suction w/Spades Quill...

  • Page 15: Valve Location

    HYDRAULIC SYSTEM VALVE LOCATION Solenoid Cartridge Valves Coil Valve Type Wire Color SV08-2211 Pink S2C1 Dark Green SV08-47D S2C2 Purple Quill SV10-43 Yellow SV08-2211 Blue S5C1 Black Lift SV08-47C Cylinder S5C2 Orange Base S6C1 Brown SV08-47C S6C2 White Lift Ram Pump Base Pressure...

  • Page 16: Cartridge Valves

    HYDRAULIC SYSTEM CARTRIDGE VALVES Nine of the ten hydraulic functions require Power from the vehicle battery is supplied to the The RDV™ V-plow hydraulic system performs ten energizing the electric motor and opening solenoid solenoid coils and the motor relay via the plow blade movement functions.

  • Page 17: Check Valves And Relief Valves

    HYDRAULIC SYSTEM CHECK VALVES RELIEF VALVES The check valves supply make-up fl uid to the When all cartridge valves are closed, hydraulic low-pressure side of a ram that is extending or fl uid is trapped in the ram by the solenoid cartridge retracting through a relief valve due to impact on valves, check valves, base-end relief valves, and Pressure...

  • Page 18: Hydraulic Fitting And Hose Installation

    HYDRAULIC SYSTEM HYDRAULIC FITTING AND HOSE INSTALLATION 4. Unscrew the fi tting to its proper position; no Lift Ram Base NOTE: Overtightening JIC hose fi tting ends will more than one full turn. result in a fractured fi tting. 5. Using two wrenches, hold the fi tting body DO NOT use thread sealant/tape on hydraulic in position and tighten the jam nut until the hoses or fi...

  • Page 19: Ram Seal Installation

    HYDRAULIC SYSTEM RAM SEAL INSTALLATION 1. Lubricate the O-rings with hydraulic fl uid before assembly. 2. Assemble the gland components as shown, Groove then lubricate them with hydraulic fl uid. in Rod 3. Remove the piston from the rod and assemble the piston components as shown.

  • Page 20: Cartridge And Check Valve Removal

    HYDRAULIC SYSTEM CARTRIDGE & CHECK VALVE REMOVAL BLADE DROP SPEED ADJUSTMENT It is possible to remove cartridges and check 8. You should now be able to remove cartridges WARNING valves from a hydraulic unit without draining the and check valves from the hydraulic unit with Keep 8' clear of the blade when it is being hydraulic fl...

  • Page 21: Vehicle-Side Electrical Components

    VEHICLE-SIDE ELECTRICAL COMPONENTS HARNESS DIAGRAM Factory Vehicle Harness Park/Turn Lamps Battery 200A Fuse and Holder Vehicle Headlamps Vehicle Battery Cable Vehicle Control Harness To Snowplow Control Vehicle Lighting Harness To Switched (11-pin) Accessory Turn Signal Configuration Plug Vehicle Headlamps Typical Plug-In Harness 10A Fuses Fire Wall 3-Port Module...

  • Page 22: Harness Diagram - Led Headlamps

    VEHICLE-SIDE ELECTRICAL COMPONENTS HARNESS DIAGRAM – LED HEADLAMPS 25A Fuse CAUTION * See the Battery Connections section for more information. On 2-plug electrical systems, plug covers ** Included in 200A Fuse Kit (PN 90730) Vehicle Vehicle shall be used whenever snowplow is Grounding Post* Battery Cable...

  • Page 23: Controls - Fleet Flex Electrical System

    CONTROLS OVERVIEW Each control is equipped with an ON/OFF button The control ON/OFF button or switch serves as an WARNING or switch and an indicator light to show when the emergency stop, if required. To prevent accidental movement of control is powered ON or OFF. The controls are the blade, always turn the control OFF powered by the vehicle's battery, so the vehicle All controls are protected by a replaceable fuse...

  • Page 24: Operating The Power Grip™ Hand-Held Control

    CONTROLS OPERATING THE POWER GRIP™ HAND-HELD CONTROL Function Time-Outs Control Functions WARNING The driver shall keep bystanders clear of Raise, Lower, Float, Angle All control functions, except LOWER/FLOAT, time the blade when it is being raised, lowered, out (stop) automatically after a period of time. This or angled.
  • Page 25 CONTROLS POWER GRIP™ Hand-Held Control Functions, continued Wing Positions With wings in a straight line, press the L NOTE: If a control function times out before button to move both wings to the angle left desired blade movement is complete, release (Angle position.

  • Page 26: Operating The Joystick Control

    CONTROLS OPERATING THE JOYSTICK CONTROL Function Time-Outs Control Lever Movement WARNING The driver shall keep bystanders clear of All control functions, except LOWER/FLOAT, time From the center position, the control lever can be the blade when it is being raised, lowered, out (stop) automatically after a period of time.
  • Page 27 The FLOAT light in the upper movement. right corner of the control face will illuminate. The blade will lower to the SnowEx ® Joystick Control Function Time-Outs (seconds) ground surface and follow the contour of the surface as it dips or rises. Function FLOAT †...

  • Page 28: Fleet Flex Electrical System

    FLEET FLEX ELECTRICAL SYSTEM SMOOTH STOP AND ONE-TOUCH FLOAT FEATURES Smooth Stop Enable/Disable Procedure 3. Smooth Stop: Move and hold the control lever to the "R" position or press and hold the R button while turning the control ON. Smooth stop, or soft stop, allows the blade to coast To enable/disable the smooth stop and one-touch to a stop when the button/lever is released.

  • Page 29: Security Guard™ Snowplow Anti-Theft System

    FLEET FLEX ELECTRICAL SYSTEM SECURITY GUARD™ SNOWPLOW ANTI-THEFT SYSTEM Activation & Establishing a 4-Digit Manual Unlock Enter your 4-digit security code by moving the control lever to (or pressing the button for) Security Code any four of the eight following positions: UP, If the SECURITY GUARD system is activated DOWN, LEFT, RIGHT, 1, 2, 3, or 4.
  • Page 30 FLEET FLEX ELECTRICAL SYSTEM SECURITY GUARD™ SNOWPLOW ANTI-THEFT SYSTEM, continued Clearing an Established 4-Digit Light Flash Indicators Additional Notes Security Code • The SECURITY GUARD system requires POWER – Red Function any control other than one with the assigned 1. Turn the vehicle ignition switch to the "ON" or Control is OFF 4-digit security code to enter the security "ACCESSORY"...
  • Page 31 FLEET FLEX ELECTRICAL SYSTEM SECURITY GUARD™ SNOWPLOW ANTI-THEFT SYSTEM, continued Distributor Master Control 1. Turn the vehicle ignition to the "OFF" position. 3. Pushing the tool down will engage all functions except LOWER. While pushing down on the 2. With the control power OFF, using the tool that plate, turn the vehicle ignition ON.

  • Page 32: Electrical & Hydraulic Schematics

    ELECTRICAL & HYDRAULIC SCHEMATICS The following section contains hydraulic and electrical schematics to help explain how the ELECTRICAL LEGEND HYDRAULIC LEGEND hydraulic unit performs the diff erent functions. A schematic is an abstract drawing showing the CROSSING WIRE LINE, WORKING (MAIN) CHECK VALVE purpose of each of the components in the system.

  • Page 33: Electrical Schematic - Rdv™ V-Plow

    ELECTRICAL & HYDRAULIC SCHEMATICS Electrical Schematic – RDV™ V-Plow Lit. No. 30118, Rev. 00 June 15, 2020...

  • Page 34: Hydraulic Schematic - Rdv V-Plow

    ELECTRICAL & HYDRAULIC SCHEMATICS Hydraulic Schematic – RDV™ V-Plow LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER Relief Valve Settings Pump 2250 ± 100 psi DS Ram Rod End S5C2 S5C1 S6C1 S6C2 2200 ± 100 psi PS Ram Rod End DS Ram Base End SECONDARY MANIFOLD...

  • Page 35: Raise

    RAISE – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the RAISE function on the cab control, the control sends a signal to plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valves S2C1 and S4.
  • Page 36 RAISE – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT EXTEND RETRACT...

  • Page 37: Lower/Float

    LOWER/FLOAT – ELECTRICAL System Response WARNING If Scrape Maxx™feature is ENABLED and vehicle key is ON, the hydraulic unit can turn on temporarily without notice, if the control has been placed in the LOWER mode without any further control input. NOTE: For units with the accessory Scrape Maxx down force kit, see that section below.
  • Page 38 LOWER/FLOAT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT EXTEND RETRACT...

  • Page 39: Angle Right

    ANGLE RIGHT – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Angle Right function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valves S5C2 and S3.
  • Page 40 ANGLE RIGHT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT EXTEND...

  • Page 41: Angle Left

    ANGLE LEFT – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Angle Right function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valves S5C1 and S3.
  • Page 42 ANGLE LEFT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT EXTEND...

  • Page 43: Bucket Blade™ (Vee)

    BUCKET BLADE™ (VEE) – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the BUCKET BLADE (Vee) function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valves S5C1 and S6C2.
  • Page 44 BUCKET BLADE™ (VEE) – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT...

  • Page 45: Compact (Scoop)

    COMPACT (SCOOP) – ELECTRICAL System Response 1. Verify that the POWER switch is in the low position. 2. By activating the COMPACT (scoop) function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valves S5C2 and S6C1.
  • Page 46 COMPACT (SCOOP) – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND RETRACT EXTEND...

  • Page 47: Right (Ps) Wing Extend

    RIGHT (PS) WING EXTEND – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Right Wing Extend function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valve S6C1.
  • Page 48 RIGHT (PS) WING EXTEND – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND...

  • Page 49: Right (Ps) Wing Retract

    RIGHT (PS) WING RETRACT – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Right Wing Retract function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valve S6C2.
  • Page 50 RIGHT (PS) WING RETRACT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND...

  • Page 51: Left (Ds) Wing Extend

    LEFT (DS) WING EXTEND – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Left Wing Extend function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valve S5C2.
  • Page 52 LEFT (DS) WING EXTEND – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND...

  • Page 53: Left (Ds) Wing Retract

    LEFT (DS) WING RETRACT – ELECTRICAL System Response 1. Verify that the POWER switch is in the plow position. 2. By activating the Left Wing Retract function on the cab control, the control sends a signal to the plow module to complete the ground path for the electrical circuit, activating the motor relay and solenoid cartridge valve S5C1.
  • Page 54 LEFT (DS) WING RETRACT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK Blade Movement Scrape ANGLE ANGLE RIGHT RIGHT LEFT LEFT Maxx™ RAISE LOWER RIGHT LEFT SCOOP EXTEND...

  • Page 55: Hold In Raise Position

    HOLD IN RAISE POSITION System Response Hydraulic fl uid is trapped in the rod end of the lift ram by the solenoid cartridge valve S1 and check valve CV6. LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE LIFT RAM RAISE LOWER S5C2 S5C1...

  • Page 56: Striking An Object While Plowing Forward

    STRIKING AN OBJECT WHILE PLOWING FORWARD – HYDRAULIC System Response 1. Hydraulic fl uid is trapped in the base end of 3. When the snowplow contacts an object while 4. Due to the small volume on the rod side of the driver-side ram by the CV4 check valve, plowing, the force of the impact increases the piston, fl...

  • Page 57: Striking An Object While Back Dragging

    STRIKING AN OBJECT WHILE BACK DRAGGING – HYDRAULIC System Response 1. Hydraulic fl uid is trapped in the rod end of the 3. When the snowplow contacts an object while 4. Because of diff erential volume on either side driver-side ram by the inactivated S4 solenoid back dragging, force of the impact increases of the ram's piston, fl...

  • Page 58: Detach

    DETACH – HYDRAULIC System Response 4. Hydraulic fl uid from the pump fl ows through the 6. Retracting the cylinder moves the headgear activated S2C1 cartridge valve, through CV6 into forward, dropping the stand. Once the stand the rod end of the lift ram, causing the ram to contacts the ground and hydraulic pressure NOTE: Read instructions for complete retract.

  • Page 59: Attach

    ATTACH – HYDRAULIC System Response 4. Hydraulic fl uid from the pump fl ows through the 6. This action rotates the headgear up into activated S2C2 cartridge valve, through CV5 mounting position. into the base end of the lift ram. NOTE: Read instructions for complete NOTE: if pressure exceeds 425 psi, RV2 will attachment.

  • Page 60: Scrape Maxx™ Down Force Kit

    Scrape Maxx™ DOWN FORCE KIT – HYDRAULIC LEFT BASE LEFT ROD RIGHT ROD RIGHT BASE NOTE: Verify if Scrape Maxx™ LIFT RAM RAISE LOWER feature has been installed and if ENABLED on the hydraulic system. S5C2 S5C1 S6C1 S6C2 SECONDARY MANIFOLD INTERFACE PUMP TANK...
  • Page 61 Scrape Maxx™ DOWN FORCE KIT – ELECTRICAL Lit. No. 30118, Rev. 00 June 15, 2020...

  • Page 62: Headlamps

    HEADLAMPS – ELECTRICAL/HARNESSES FLOAT Ground FLOAT Input EdgeView LIGHT EdgeView™SENSE IN COMMON COMMON BLK/ORN BLK/ORN RIGHT LOW BLK/WHT RIGHT LOW BLK/WHT RIGHT HIGH RIGHT HIGH WHT/YEL WHT/YEL LEFT HIGH LEFT HIGH EdgeView LIGHT BEL OUT BLK/ORN COMMON BLK/ORN LEFT LOW LEFT LOW LEFT TURN LEFT TURN...

  • Page 63: Electrical Schematics

    HEADLAMPS: ELECTRICAL SCHEMATIC – 3-PORT MODULE Vehicle Battery Cable, 4-Receptacle Snowplow Assembly 1 – Red (Control Power) 1 – Red Control – 2 – Red (Twisted with #3) 2 – Green 3 – Black (Twisted with #2) 3 – White Battery NEG (–) 4 –...
  • Page 64 HEADLAMPS: TYPICAL LED SCHEMATIC ( Continued on following page BAT (+) 8 RED TO VEHICLE BAT (–) 8 BLK BATTERY CABLE ASSEMBLY, HCM PN 72549 (72550) CONNECTION: FROM WIRE ON THE FLOAT SOLENOID COIL, HYDRAULIC UNIT, TO YELLOW WIRE BREAKOUT AT THE Y OF THE PLOW LIGHTING HARNESS.
  • Page 65 HEADLAMPS: TYPICAL LED SCHEMATIC ( continued from previous page 18 BLK TO PLOW CONTROL 18 RED BAT (+) FROM VEHICLE 14 RED/GRN BAT (–) 12 BLK CABLE ASSEMBLY TO SWITCHED PLOW CONTROL HARNESS ACCESSORY LEAD ISOLATION MODULE TYPICAL PLUG-IN HARNESS (BLUE WIRES) LO_IN LOW IN...
  • Page 66 HEADLAMPS: TYPICAL DUAL-WIRE HALOGEN/LED SCHEMATIC ( continued on following page TO VEHICLE BAT (+) 8 RED BAT (–) BATTERY 8 BLK CONNECTION: FROM WIRE ON THE FLOAT SOLENOID COIL, CABLE ASSEMBLY, HCM HYDRAULIC UNIT, TO YELLOW WIRE BREAKOUT AT THE Y PN 72549 (72550) OF THE PLOW LIGHTING HARNESS.
  • Page 67 HEADLAMPS: TYPICAL DUAL-WIRE HALOGEN/LED SCHEMATIC ( continued from previous page 18 BLK TO PLOW CONTROL 18 RED FROM VEHICLE BAT (+) 14 RED/GRN BAT (–) 12 BLK CABLE ASSEMBLY TO SWITCHED PLOW CONTROL HARNESS ACCESSORY LEAD ISOLATION MODULE (BLUE WIRES) TYPICAL PLUG-IN HARNESS LO_IN LOW IN...
  • Page 68 HEADLAMPS: DUAL-WIRE HALOGEN/LED INSTALLATION PART OF FACTORY VEHICLE HARNESS BATTERY VEHICLE INSTALL: LIGHTS VEHICLE CABLE ASSEMBLY PN: 72549 (72550) NO CHANGE: VEHICLE BATTERY CABLE PN: 28584 (42014) HALOGEN PLOW LIGHTS NO CHANGE: NO CHANGE: TO PLOW CONTROL TYPICAL 3-PORT PLOW LIGHTING HARNESS CONNECT TO A NO CHANGE: PLUG-IN...

  • Page 69: Troubleshooting

    Troubleshooting Lit. No. 30118, Rev. 00 June 15, 2020...

  • Page 70: How To Use The Troubleshooting Guide

    FUSE REPLACEMENT TROUBLESHOOTING GUIDE The vehicle control harness contains one CAUTION 2A automotive-style mini fuse and the hydraulic All malfunctions of the SnowEx ® RDV™ V-plow Do not probe wires. Doing so will damage unit contains three 5A automotive-style mini...

  • Page 71: Before You Begin

    TROUBLESHOOTING BEFORE YOU BEGIN Before proceeding, or carrying out any tests, d. The fuses are good. g. The hydraulic reservoir is fi lled to the you must verify the following conditions: proper level with recommended fl uid when e. The vehicle battery and charging system the blade is sitting on the ground in the 1.

  • Page 72: Solenoid Coil Activation Test (Scat)

    TROUBLESHOOTING SOLENOID COIL ACTIVATION TEST (SCAT) b. Separate the coils by approximately acting coil(s) for switched ground while NOTE: See the Controls section for details on 1/2" and hold them in that position. activating the function that should energize control time-outs and wing functions. Activate the function that uses one of the the coil(s).
  • Page 73 TROUBLESHOOTING Diagnostic Harness Installation 4. Connect the diagnostic harness connectors A 5. Plug the connectors removed from the plow and B to the matching ports on the plow module into the matching connectors on the module (A to A and B to B). diagnostic harness (A to A and B to B).
  • Page 74 TROUBLESHOOTING SOLENOID COIL ACTIVATION TEST (SCAT), continued 8. Turn the snowplow control ON and perform a 9. After completing the SCAT, turn the snowplow NOTE: The green LED on the diagnostic Solenoid Coil Activation Test (SCAT) for each control OFF. harness will illuminate when the motor relay control function.

  • Page 75: Individual Solenoid Coil Test

    TROUBLESHOOTING INDIVIDUAL SOLENOID COIL TEST 1. Remove both wires from coil terminals. 2. Attach an ohmmeter across the coil terminals. 3. A reading that is not approximately 7 ohm indicates coil is damaged and must be replaced. 4. Attach an ohmmeter to one coil terminal and to the steel washer at the end of the coil.

  • Page 76: Control/Cable/Plow Module Test

    TROUBLESHOOTING CONTROL/CABLE/PLOW MODULE TEST To Safely Handle the Printed CONDITION POSSIBLE CAUSE CORRECTIVE ACTION Circuit Board Make sure that the grille plug between snowplow and vehicle is Snowplow is not connected. properly connected. CAUTION With the vehicle switched accessory ON, test the 4-pin connector Circuit board may be damaged by static inside the cab.

  • Page 77: Motor And Motor Relay Test

    TROUBLESHOOTING MOTOR AND MOTOR RELAY TEST If switched ground is not present, check the If switched 12V is not present, disconnect WARNING black wire and harness B of the plow module. the vehicle battery cable from the snowplow Keep 8' clear of the blade when it is being Replace/repair either the wire or the harness battery cable and replace the motor relay.

  • Page 78: Pump Pressure Test

    TROUBLESHOOTING TROUBLESHOOTING PUMP PRESSURE TEST WARNING NOTE: See the following page for Relief Valve Inspection and Pressure The tester shall keep bystanders 8' clear of Adjustment instructions. Gauge the blade during these tests. Do not stand between vehicle and blade or within 8 feet of a moving blade.

  • Page 79: Relief Valve Inspection And Adjustment

    TROUBLESHOOTING RELIEF VALVE INSPECTION AND ADJUSTMENT Adjustment Relief valve RV2 and components are not interchangeable with the other relief valves. Primary CAUTION NOTE: The spring for relief valve RV2 is Manifold Never operate the unit while adjusting the diff erent from the other springs and should not relief valve.

  • Page 80: Scrape Lock Adjustment

    TROUBLESHOOTING SCRAPE LOCK ADJUSTMENT WARNING the ground and turn the control OFF. Turn the CAUTION vehicle ignition to the "OFF" position. If the Scrape Maxx™ down-force feature Never operate the unit while adjusting the is ENABLED, the vehicle key is ON, scrape lock valve.
  • Page 81 TROUBLESHOOTING 10. Lower the fl oor jack. Turn the control ON and 14. Disconnect the snowplow battery cable from lower the blade onto the jack. the vehicle battery cable. 11. If the pressure reading obtained in Step 9 was 15. Loosen the breather/fi ll plug slowly to relieve less than 210 psi, turn the scrape lock (RV2) any pressure in the reservoir.

  • Page 82: Replacing Damaged Bearing Sleeves

    TROUBLESHOOTING REPLACING DAMAGED BEARING SLEEVES 4. Turn the hex nut onto the bushing puller pin Remove Damaged Bearing Sleeve until the underside of the pin head is snug against the end of the bearing sleeve. 1. Remove the reservoir, pump, and motor from the hydraulic manifold.
  • Page 83 TROUBLESHOOTING Pump Alignment 3. With the pump alignment tool in place, alternately tighten the pump fasteners to 150–160 in-lb. NOTE: The hydraulic pump may contain a .75" OD alignment ring that fi ts in a 4. Remove the pump alignment tool. counter-bore around the shaft.
  • Page 84 US Patents: 7,400,058; 7,737,576; 9,200,418. TrynEx International off ers a limited warranty for all snowplows and accessories. See separately printed page for this important information. The following are registered ( ) or unregistered (™) trademarks of Douglas Dynamics, LLC: BUCKET BLADE™, POWER GRIP™, Scrape Maxx™, SECURITY GUARD™, SnowEx ®...

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