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 OWNER‘S MANUALHTV SERIES SNOW PLOW FOR PLOW SERIAL NUMBERS AFTER HTV200000 HTVG100000©2003 Sno-Way® International 97100759B TABLE OF CONTENTSPage TABLE OF CONTENTS ............................................................................................. 1 INTRODUCTION ........................................................................................................ 2 SAFETY ...................................................................................................................... 3 THEORY OF OPERATION......................................................................................... 4 Hydraulic Power Unit......................................................................................... 4 Hydraulic Controls............................................................................................ 4 Electro-Hydraulic Controls .............................................................................. 4 Raise Mode of Operation .................................................................................. 4 Lower Mode of Operation - Gravity Down and Float ...................................... 4 Lower Mode of Operation - Down Pressure (DP) System ............................. 4 Wing Angling Mode of Operation..................................................................... 5 Combination Wing Angling.............................................................................. 5 Circuit Breaker .................................................................................................. 5 PLOWING OPERATION............................................................................................. 6 Operating Classes ............................................................................................ 6 Before The Season Begins .............................................................................. 6 Transporting Vehicle With Blade Attached..................................................... 6 Plowing Like A Pro ........................................................................................... 7 Using The Down Pressure Hydraulic System ................................................ 7 Plowing Roadways ........................................................................................... 7 Clearing Parking Lots....................................................................................... 7 Mounting Snow Plow To Vehicle ..................................................................... 8 Installing The Cylinder Lock Clamp.............................................................. 10 Removing Snow Plow From Vehicle ............................................................. 10 Plow Storage ................................................................................................... 11 TROUBLE SHOOTING GUIDE ................................................................................ 12 Introduction..................................................................................................... 12 Trouble Shooting-Quick Reference General................................................. 12 Trouble Shooting Charts ................................................................................. 13 MAINTENANCE ....................................................................................................... 17 General ............................................................................................................ 17 Periodic Inspection......................................................................................... 17 Special Fasteners Torques and Requirements ............................................ 17 Hydraulic Cylinders ........................................................................................ 18 Electrical Quick Disconnect Plugs................................................................ 18 Service Intervals ............................................................................................. 18 Fluid Requirements ........................................................................................ 18 Changing Oil and Cleaning Filter Screen ..................................................... 18 Disk Shoe Adjustment.................................................................................... 19 Float Limiter Adjustment ............................................................................... 21 Pivot Assembly Pivot Screws ........................................................................ 22 Cutting Edge ................................................................................................... 22 Trip Spring Adjustment .................................................................................. 23 TORQUE SPECIFICATIONS.................................................................................... 24 HYDRAULIC SCHEMATIC (GRAVITY) .................................................................... 25 HYDRAULIC SCHEMATIC (DOWN PRESSURE) .................................................... 26 WIRING SCHEMATIC (GRAVITY) ........................................................................... 27 WIRING SCHEMATIC (DOWN PRESSURE)............................................................ 28 WARRANTY...............................................................................................Back Cover INTRODUCTIONThis manual was written for the assembly, installation and maintenance of your new Sno-Way plow. Most importantly, this manual provides an operating plan for safe use. Refer to the Table of Contents for an outline of this manual. Please keep this manual with your machine at all times as reference material and so it can be passed on to the next owner if the machine is sold. We require that you read and understand the contents of this manual COMPLETELY, especially the chapter on SAFETY, before attempting any procedure contained in this manual.  The Society of Automotive Engineers has adopted this SAFETY ALERT SYMBOL to pinpoint characteristics that, if NOT carefully followed, can create a safety hazard. When you see this symbol in this manual or on the machine itself, BE ALERT!, your personal safety and the safety of others, is involved. • Defined in the next column, are the SAFETY ALERT messages and how they will appear in this manual.
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| DEALER | ||||
|---|---|---|---|---|
| NAME | ||||
| ADDRESS | ||||
| PHONE (CITY | ) – | STATE | ZIP | (FILL IN) |
| ORIGINAL PURCHASER | ||||
| NAME | ||||
| ADDRESS | ||||
| PHONE (CITY | ) – | STATE | ZIP | (FILL IN) |
We reserve the right to make changes or improve the design or construction of any part(s) without incurring the obligation to install such parts or make any changes on any unit previously delivered.
Sno-Way snow plow Service Parts Manuals are available for purchase from your authorized Sno-Way dealer. Sno-Way snow plow Service Parts Manuals may also be ordered from the address on the back of this manual by requesting part number 97100742.
BEFORE ATTEMPTING ANY PROCEDURE IN THIS BOOK, READ AND UNDERSTAND ALL THE SAFETY INFORMATION CONTAINED IN THIS SECTION. IN ADDITION, ENSURE ALL INDIVIDUALS WORKING WITH YOU ARE ALSO FAMILIAR WITH THESE SAFETY PRECAUTIONS.
For your safety Warning and Information Decals have been placed on this product to remind the operator to take safety precautions. It is important that these decals are in place and are legible before operation begins. New decals can be obtained from Sno-Way or your local dealer.
REMEMBER The careful operator is the best operator. Most accidents are caused by human error. Certain precautions must be observed to prevent the possibility of injury to operator or bystanders and/or damage to equipment.
NEVER operate Plow when under the influence of alcohol, drugs or other medications that could hamper your judgement and reactions. An accident may result in serious injury or death to other persons or yourself.
ALWAYS operate vehicle in a well-ventilated area. The carbon monoxide in exhaust gas is highly toxic and can cause serious injury or death.
NEVER allow hands, hair or clothing to get near any moving parts such as fan blades, belts and pulleys. Never wear neckties or loose clothing when working on the vehicle.
NEVER wear wrist watches, rings or other jewelry when working on the vehicle or individual equipment. These things can catch on moving parts or cause an electrical short circuit that could result in serious personal injury.
ALWAYS wear safety goggles when working on the vehicle to protect your eyes from battery acid, gasoline, and dust or dirt from flying off of moving engine parts.
ALWAYS be aware of and avoid contact with hot surfaces such as engine, radiator, and hoses.
ALWAYS wear safety glasses with side shields when striking metal against metal! In addition, it is recommended that a softer (non-chipable) metal material be used to cushion the blow. Failure to heed could result in serious injury to the eye(s) or other parts of the body.
NEVER allow children or unauthorized person to operate this unit.
NEVER exceed 45 m.p.h. when snow plow is attached to vehicle. Braking distances may be reduced and handling characteristics may be impaired at speeds above 45 m.p.h.
ALWAYS lock the vehicle when unattended to prevent unauthorized operation of the plow.
ALWAYS check the job site for terrain hazards, obstructions and people.
NEVER exceed 10 m.p.h. when plowing. Excessive speed may cause serious injury and damage of equipment and property if an unseen obstacle is encountered while plowing.
ALWAYS position blade so it does not block path of headlamps beam. Do not change blade positions while traveling. An incorrect plow position blocking headlamp beam may result in an accident.
ALWAYS check surrounding area for hazardous obstacles before operating this unit.
ALWAYS inspect the unit periodically for defects. Parts that are broken, missing or plainly worn must be replaced immediately. The unit, or any part of it should not be altered without prior written approval of the manufacturer.
ALWAYS insert the cylinder lock when plow is not in use. If the cylinder lock is not installed, the plow blade could inadvertently drop and cause serious injury.
ALWAYS shut off the vehicle engine, place the transmission in Neutral or Park, turn the ignition switch to the “OFF” position and firmly apply the parking brake of the vehicle before attaching or detaching the blade from the vehicle or when making adjustments to the blade.
ALWAYS inspect lift system bolts and pins whenever attaching or detaching the plow, and before traveling. Worn or damaged components could result in the plow dropping to the pavement while driving, causing an accident.
ALWAYS keep hands and feet clear of blade and A-Frame when attaching or detaching plow.
NEVER place fingers in A-frame or mount lug holes to check alignment when attaching snow plow. Sudden motion of the plow could severely injure a finger.
NEVER stand between the vehicle and blade or directly in front of blade when it is being raised, lowered or angled. Clearance between vehicle and blade decreases as blade is operated and serious injury or death can result from blade striking a body or dropping on hands or feet.
NEVER work on the vehicle without having a fully serviced fire extinguisher available. A 5 lb or larger CO2 or dry chemical unit specified for gasoline, chemical or electrical fires, is recommended.
NEVER smoke while working on the vehicle. Gasoline and battery acid vapors are extremely flammable and explosive.
NEVER use your hands to search for hydraulic fluid leaks; escaping fluid under pressure can be invisible and can penetrate the skin and cause a serious injury! If any fluid is injected into the skin, see a doctor at once! Injected fluid MUST BE surgically removed by a doctor familiar with this type of injury or gangrene may result.
REMEMBER it is the owner’s responsibility for communicating information on the safe use and proper maintenance of this machine.
3
The hydraulic power unit consists of:
The fluid supply line for the pump is submerged in the hydraulic fluid reservoir and is equipped with a fine mesh intake filter screen.
The 12VDC motor is protected electrically by a 150 Amp circuit breaker located between the battery and the motor solenoid.
The hydraulic pump is protected by a 2100 PSI system relief valve.
This unit is equipped with a Down Pressure Option which will allow the operator to selectively switch the system to provide additional hydraulic force to the cutting edge of the plow.
IMPORTANT: The electric coils, which operate the solenoid valves, require a minimum of 9-1/2 volts DC for proper operation. Lower voltage will cause erratic operation, or failure to operate.
The hydraulic controls consist of:
All hydraulic functions are controlled by the 12VDC electrical system which actuates coils on the hydraulic valves and the solenoid for the electric motor of the power unit. 12VDC power is fed from the battery post of the motor start solenoid to a control circuit board on the plow and from the circuit board to each coil. Each valve is actuated by completing a circuit to ground through the coil, and through the circuit board by means of a wire transmitted signal to the circuit board from the hand-held controller in the vehicle.
Actuating the ’Raise’ switch on the hand-held controller sends a signal to the control circuit board on the plow which then actuates the motor solenoid and the coils for the ’C’ valve and ’F’ valve. Actuating the start solenoid sends current to the power unit motor to cause the power unit to pump hydraulic fluid. Hydraulic fluid, under pressure, is directed through the ’C’ valve to the lift cylinder causing it to extend and raise the plow. The ’F’ valve is also actuated to allow fluid in the rod end of the double acting raise cylinder to return to the reservoir. When the ’Raise’ switch on the hand-held controller is released the start solenoid circuit is broken and the motor stops, the circuit to the coil for the ’C’ valve and the ’F’ valve is broken and these valves got to their normally closed positions.
Actuating the ’Lower’ switch on the hand-held controller sends a signal to the control circuit board on the plow which then actuates the coil for the ’B’ valve and the ’F’ valve allowing hydraulic fluid to flow from the lift cylinder to the reservoir. Once the ’Lower’ switch has been actuated, the system will stay in this mode until the raise function is actuated, allowing hydraulic fluid to flow between the reservoir and the lift cylinder and let the lift cylinder extend and retract as necessary to follow ground contours while plowing.
This system operates only when the ’DP’ switch and the ’Lower’ switch on the hand-held controller is actuated. Actuating the ’DP’ switch (a red LED will be lit) actuates the pressure switch, the ’B’ valve coil, the ’E’ valve coil and, through the pressure switch, the start solenoid as required. When the ’E’ valve is actuated and the hydraulic pump operates, hydraulic fluid is directed to the rod end of the lift cylinder compressing the cylinder and forcing the plow down. The pressure switch in this system senses the pressure of the fluid in the lift cylinder and closes when the pressure becomes low, allowing the motor and the pump to pump fluid into the rod end of the cylinder. When the pressure reaches the proper level, the switch opens, shutting off the motor and pump. The system is protected by a relief valve which relieves excess pressure if the plow is forced up, such as by a bump or obstacle in the roadway. Once any obstacle is cleared, the plow can return to a lower position lowering the pressure in the system. If the pressure is lowered sufficiently, the pressure switch will then sense the lowered pressure and cause the pump to pump fluid into the system and return it to the proper pressure.
The down pressure system is overridden any time the plow control is placed in the ’Raise’ mode, but will resume when placed back into the ’Lower’ position.
Also, note that the ’E’ valve is deactivated anytime an angle function is activated, but returns to it’s previous condition as soon as the angle function is completed.
Each wing can be angled forward or rearward independently by operating the forward or rearward switch for either the right or left wing.
Operating the right extend switch on the controller will energize the motor solenoid and the ’A’ coil, which will allow hydraulic oil under pressure to be directed too the base end of the right wing cylinder. Operating the right retract switch on the controller will energize the motor solenoid and the ’D’ coil, which will allow hydraulic fluid under pressure to be directed to the rod end of the right wing cylinder. Operating the left wing extend switch will perform the same function as the right except that the ’G’ coil will be energized instead of the ’A’ coil. Operating the left retract switch will perform the same function as the right retract except that the ’H’ coil will be energized instead of the ’D’ coil.
Both wings can be moved together using the control switches on the controller. Operating the forward combination switch on the controller will extend both wings in the ’scoop’ position. Operating this combination will energize the motor solenoid and both the ’A’ and ’G’ coils.
Operating the rearward combination switch on the controller will retract both wings into the ’V’ position. Operating this combination switch will energize the motor solenoid and both the ’D’ and ’H’ coils.
Operating the right side combination switch on the controller will extend the left wing and retract the right wing to plow all snow to the right. Operating this combination switch will energize the motor solenoid and both the ’D’ and ’G’ coils.
Operating the left side combination switch on the controller will extend the right wing and retract the left wing to plow all snow to the left. Operating this combination switch will energize the motor solenoid and both the ’A’ and ’H’ coils.
Each wing angling circuit is protected by a crossover relief valve set to relieve pressure on the wing angling circuit at 1750 PSI. Each wing also has a relief valve set at 2150 PSI.
A 150 Amp circuit breaker is located near the battery in the primary 12VDC positive power circuit and is in place to protect the motor of the hydraulic power unit. A high amp draw condition will cause the breaker element in the circuit breaker to interrupt flow to the motor. The circuit breaker will automatically reset after it cools down.
The HTV Series Sno-Way plow is specifically designed for heavy duty snow plowing with full size 3/4 and 1 ton 4x4’s.
NOTE: The loaded vehicle, including any ballast weight and optional equipment, must not exceed the Gross Vehicle Weight (GVW) or front or rear Gross Axle Weight (GAW) ratings specified on the Safety Compliance Certification Label located on the driver’s side door opening.
NOTE: All vehicles that are equipped with Sno-Way snow plows should be equipped with all vehicle manufacturer’s recommended options for snow plowing.
For additional information, refer to your dealer and the Sno-Way Application Guide for proper vehicle applications.
1. Always install the cylinder lock clamp when the plow blade is raised and the operator is not engaged in plowing operations.
NOTE: If cylinder lock clamp is not installed during transport equipment failure or inadvertent operation of the control switches while driving could allow the plow blade to fall.
| CAUTION |
|---|
| Remove the plow when driving extended distances at temperatures above 40° F, the plow blocks enough airflow to the vehicle’s radiator to cause it to overheat at temperatures above 40° F. |
5. Never change blade angle or height while driving.
| WARNING |
|---|
| • Never exceed 10 m.p.h. when plowing! Serious personal injury can result, as well as damage to equipment and property, if an unseen obstruction is encountered while plowing. • Never plow with your head protruding from the vehicle side window. Serious head or neck injuries can result from sudden stops or coming into contact with tree branches, signs or other stationary objects. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH. |
WARNING Wear your seat belt! Contact with a hidden obstruction can cause serious personal injury from bodily contact within the vehicle cab or whiplash from sudden stops.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
NOTE: The vehicle air bag is factory set to deploy at a pre-determined level of impact. The air bag will deploy with the plow attached if an obstruction is hit with enough force to reach this level. Always plow within the recommended plowing speeds and know the area you are plowing to avoid any obstructions.
1. Become familiar with the area to be plowed and mark potential hazards before the snow falls. Many immovable objects cannot be seen when covered with snow. Developing a plan early can save valuable time and equipment damage. Allow sufficient room to pile snow, out of the traffic area, with enough space for snow when the next storm comes.
The Down Pressure System was designed for removing hard packed snow from hard surfaces that have had traffic on them prior to being plowed.
The system should be turned OFF when plowing surfaces such as gravel, dirt, sand, etc., to prevent cutting into the surface being plowed.
Activating the system applies hydraulic pressure to the down side of the hydraulic lift cylinder. This down pressure will force the blade through the hard-packed snow and down to the pavement. If down pressure decreases, (results if a valley or low spot is encountered by the blade), more down pressure is applied to lower side of the lift cylinder and the blade will follow the contour of the valley. When a hill or a high spot is encountered by the blade, the down pressure will be relieved on the down side of the lift cylinder, this will allow the blade to follow the contour of the hill without lifting the front of the vehicle off the ground.
A roadway covered with unpacked snow that is not over 4-6" deep can be plowed by angling the plow wings to move the snow all to one side.
If the roadway is covered with deep and/or hard packed snow, position the plow wings in a "V"-position to move snow equally to each side to open the first path through the roadway. The roadway can then be widened by making successive passes on each side of the first path, with the wings angled to move snow to one side.
1. Plow must be on a level surface, supported by the jack stand. Drive truck towards plow and align lugs on plow to fit inside the lugs on each side of the truck sub-frame. Continue to pull forward towards plow until the plow lugs ride up into position on the sub-frame inserts located between the sub-frame lugs.
WARNING Be sure all plow functions are OFF on ALL plow controls in the vehicle cab before making ANY electrical connections.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
| WARNING |
|---|
| • Ensure engine is OFF and set parking brake before mounting snow plow to vehicle. Vehicle movement, equipment failure, or inadvertent operation of the control switches during installation could result in serious injury. • NEVER place fingers in A-frame or mount lug holes to check alignment. Sudden motion of the plow could severely injure a finger. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH. |
2. Remove the protective plastic covers from the snow plow and vehicle harnesses and store them inside the vehicle for installation when the plow is removed.
The power cable on the front of the truck is wired directly to the battery. The power cable is always energized, even if the truck is turned off. Always replace the protective cap after disconnecting the plow power cable. Allowing an unprotected plug to contact metal parts of the truck may cause electrical component damage. Never use a metal object to clean the plug contacts.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
When using the hand-held controller to raise or lower the plow A-frame for mounting the plow to the vehicle, be especially careful of the movement of the light bar, if so equipped. This movement will occur when raising or lowering the A-frame on the jackstand.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
5. If needed, the hand-held controller can be used to raise or lower the A-frame to precisely align the pinholes. To raise the plow, press the ’UP’ function on the controller. To lower the plow, turn on down pressure and press the ’LOWER’ function. The ’UP’ function must be pressed to stop the downward motion once it begins. To lower plows without down pressure, place the plow in
float and push up on the light bar (pulling down on the light bar raises the A-frame), or push down on the A-frame if no light bar is used.
WARNING Pressing the blade angle functions will result in the A-frame swinging if it is not secured to the truck. Do not press the angle function during plow installation.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
6. Place the plow in float (turn off the down pressure) and insert the lower hitch pins on each side of the plow. Secure the hitch pins with lynch pins.
| CAUTION |
|---|
| NEVER move the vehicle while plow electrical harnesses are connected and the plow is not fully attached to the vehicle. |
NOTE: If the plow and vehicle are not level with each other, install one lower hitch pin and then, using the ’Raise’ or ’Lower’ switch on the hand-held controller, adjust the A-frame height to allow installation of the second lower hitch pin.
Figure 1-1
7. After the lower hitch pins and lynch pins have been installed, turn on the down pressure function (if the plow is equipped with down pressure hydraulics) and use the ’Lower’ switch on the hand-held controller to raise the lift
link and light bar. If the plow is not equipped with down pressure hydraulics, press the ’Lower’ button to put the plow in float mode, then raise the lift link and light bar manually. Raise the lift link and light bar until it contacts the nose piece.
IMPORTANT: The end of the spring-loaded latch pin fits into a short tube on the side of the bellcrank assembly. If the pin is not retained in this tube, the jackstand may become loose and fall down during plowing or transport.
Installing The Cylinder Lock Clamp 1. Drive vehicle to the desired snow plow storage area. It is recommended that the plow be stored in a dry,
| WARNING |
|---|
| • Always install the cylinder lock clamp when the plow blade is raised and the operator is not engaged in plowing operations. Equipment failure or inadvertent operation of the control switches while driving could allow the plow blade to fall, resulting in serious injury. • Ensure engine is OFF and set parking brake before installing the cylinder lock clamp. Vehicle movement, equipment failure, or inadvertent operation of the control switches during installation could allow the plow blade to fall, resulting in serious injury. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH. |
3. Remove the pin from the cylinder lock clamp.
4. Position the cylinder lock clamp around the exposed (chrome) portion of the lift cylinder and install the pin. (See Figure 1-2)
Figure 1-2
Choose a location for the plow storage which will allow the plow to be removed from the vehicle and not moved after removal. Also, choose a location which will not allow the stand to sink into the ground during storage.
protected area.
NOTE: Plow should be thoroughly cleaned of all grime and road salt before it is put into storage.
2. Place plow in the vee position.
 | WARNING |
|---|---|
| • Ensure engine is OFF and parking brake is set before removing snow plow from vehicle. Vehicle movement, equipment failure or inadvertent operation of the control switches during removal could result in serious injury. • Ensure all personnel are clear of the area surrounding the plow storage location before angling or lowering the plow to prevent serious injury. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH | |
IMPORTANT: Disconnect the light wiring harness at this time, and install the protective caps over the ends of the harness.
When using the hand-held controller to raise or lower the plow A-frame, be especially careful of movement of the light bar. This occurs during raising and lowering of the A-frame on the jackstand
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH
WARNING Keep hands and feet clear of A-frame when detaching the plow. Moving or falling assemblies could result in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH
| WARNING |
|---|
| The power cable on the front of the truck is wired directly to the battery. The power cable is always energized, even if the truck is turned off. Always replace the protective cap after disconnecting the plow power cable. Allowing an unprotected plug to contact metal parts of the truck may cause electrical component damage. Never use a metal object to clean the plug contacts. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH. |
Whenever service is necessary, your local dealer knows your plow best and is interested in your complete satisfaction. Return your snow plow to your local dealer for maintenance service or any other assistance you may require. If you are unable to do so, this Trouble Shooting Guide should help you determine the problem. Also, there are Repair Manuals available from your local dealer. However, before attempting the servicing of your plow, you should possess good mechanical abilities and a total understanding of the mechanism.
CAUTION First read all warning instruction, the safety messages, and directions before attempting any adjustments or repairs to your unit!
PLEASE: Before calling parts and service personnel be certain that:
1. You have read this guide carefully and are certain that all of the suggestions pertaining to your problem have been attempted.
2. You have the following information available.
A. Date Snow Plow was originally installed.
B. Power Pack Model Number.
C. Power Pack Serial Number.
D. Controller Serial Number.
E. Blade Model Number.
F. Blade Serial Number.
G. Pump Serial Number.
This information should be recorded on page 2 of this Owners Manual.
1. Check to see that controller is “on”.
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Plow will not lift (Motor runs) | Hydraulic fluid level low | See Maintenance Section |
| Defective Control Unit | Refer to Dealer | |
| Improper main pressure relief valve pressure setting, debris causing valve to stick | Refer to Dealer | |
| Breather cap plugged | See Maintenance Section | |
| Faulty raise or raise/float solenoid coil | Refer to Dealer | |
| Raise/lower solenoid valve stuck in lower position | Refer to Dealer | |
| Raise/lower cylinder frozen or binding | Refer to Dealer | |
| Defective or sticking Down Pressure Solenoid Valve | Refer to Dealer | |
| Pick-up tube filter plugged | See Maintenance Section | |
| Pick-up tube is not submerged in fluid | See Maintenance Section | |
| Machine failure | Refer to Dealer | |
| Weak battery and/or charging system | Refer to Dealer | |
| Motor continues to run and will not shut-off | Motor Solenoid defective | Refer to Dealer |
| Electrical short | Refer to Dealer | |
| Plow lifts slowly | Hydraulic fluid level low | See Maintenance Section |
| Breather cap plugged | See Maintenance Section | |
| Improper main relief pressure setting, debris causing valve to stick | Refer to Dealer | |
| Pick-up tube filter plugged | See Maintenance Section | |
| Improper oil viscosity for outside air temperature, unit not at normal operating temperature | See Maintenance Section | |
| Defective Lift Cylinder | Refer to Dealer | |
| Machine failure | Refer to Dealer |
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Fluid leaking at Pump Assembly | Hydraulic fittings not torqued properly (too tight, too loose) | Refer to Dealer |
| O-Rings between valve block and endhead are cut or not seating properly | Refer to Dealer | |
| O-Rings between endhead and reservoir cut or not seating properly | Refer to Dealer | |
| Reservoir over-full | See Maintenance Section | |
| O-Ring on solenoids or pressure switches defective | Refer to Dealer | |
| Endhead cracked | Refer to Dealer | |
| Valve body cracked | Refer to Dealer | |
| Unit lifts but does not hold first action | Dirt in check valve or Float/DP solenoid valve | Cycle raise and lower system to flush debris |
| Float/DP solenoid valve sticking | Cycle raise and lower system to unstick valve | |
| Unit lifts but does not hold second action | Dirt or debris in check valve | Refer to Dealer |
| Check valve spring broken | Refer to Dealer | |
| Float/DP solenoid valve sticking | Refer to Dealer | |
| Seals O-Ring(s) on Float/DP solenoid valve damaged | Refer to Dealer | |
| Raise/lower ram defective | Refer to Dealer | |
| Machine failure | Refer to Dealer | |
| Unit will not lower NOTE: Only in Non- down pressure mode | Plugged breather cap | See Maintenance Section |
| Low or no current available at Float/DP Solenoid | Refer to Dealer | |
| Float/DP solenoid valve sticking | Refer to Dealer | |
| Float/DP solenoid coil defective | Refer to Dealer | |
| Raise lower ram defective allowing movement in one direction only | Refer to Dealer | |
| Machine failure | Refer to Dealer |
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Unit will not lower NOTE: In down pressure mode only | See all above conditions | Refer to Dealer |
| Raise lower ram defective allowing movement in one direction only | Refer to Dealer | |
| Defective Control Unit | Refer to Dealer | |
| Defective down pressure solenoid | Refer to Dealer | |
| Machine failure | Refer to Dealer | |
| Motor will not run | Motor brushes worn/commutator worn or dirty | Refer to Dealer |
| Seal between motor and pump defective allowing oil to enter motor housing | Refer to Dealer | |
| Defective Start Solenoid | Refer to Dealer | |
| Motor seized | Refer to Dealer | |
| Machine failure | Refer to Dealer | |
| Blade wing moves in one direction only | Solenoid valve sticking or defective | Refer to Dealer |
| Crossover relief valve defective or sticking | Refer to Dealer | |
| Low or no current available at extend or retract solenoid valve | Refer to Dealer | |
| Angle cylinder defective allowing movement in one direction only | Refer to Dealer | |
| Machine failure | Refer to Dealer | |
| Blade wing will not move | Hydraulic fluid level low | See Maintenance Section |
| Crossover pressure relief valve setting too low | Refer to Dealer | |
| Solenoid valve sticking or defective | Refer to Dealer | |
| Low or no current available at solenoid valve | Refer to Dealer | |
| Wing cylinder binding or frozen | Refer to Dealer | |
| Pick up tube not submerged in fluid | See Maintenance Section | |
| Machine failure | Refer to Dealer | |
| Blade wing will not move, but plow raises when trying to move wings | Raise solenoid valve defective or sticking | Refer to Dealer |
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Blade wing moves very slowly | Hydraulic fluid level low | See Maintenance Section |
| Crossover Relief Valve defective or sticking | Refer to Dealer | |
| Improper oil viscosity for outside air temperature, unit not at normal operating temperature | See Maintenance Section | |
| Defective Wing Cylinder | Refer to Dealer | |
| Dirt or debris in Solenoid Valve | Refer to Dealer | |
| Blade wings will not hold position (fold rearward) | Defective or dirt/debris in Wing Relief Valve | Refer to Dealer |
| Defective or sticking Solenoid Valve | Refer to Dealer | |
| Dirt or debris in Solenoid Valve | Refer to Dealer | |
| Defective Wing Cylinder | Refer to Dealer |
After approximately every 20 hours of operation perform the following inspections procedures:
NOTE: For extremely cold weather plowing, continuous sub zero operation, an alternative is to remove the grease fittings and fill the grease cavity with SAE 140 gear oil, and then replace the grease fitting.
IMPORTANT: Incorrectly securing fasteners may result in incorrect operation, excessive wear, and early failure of plow components. It may also void your warranty.
Standard Fasteners:
The Torque Specifications Chart on page 24 of this manual should be used as the guide for fastener torque requirements for most standard fasteners used on the plow.
Standard fasteners with special torque requirements will be noted in assembly or service stories pertaining to the specific piece of equipment.
Hydraulic Fittings:
Hydraulic fittings with lock nuts should be assembled with at least three full turns of the fitting in the port and then the lock nut should be tightened to 27 lb.-ft.
Wing Cylinder Attaching Fasteners:
Base end and rod end attachment cap screws are always assembled with the cap screw head UP.
Always use a nylock nut and only torque the nut to 25 to 30 lb.-ft. DO NOT overtighten these fasteners. Overtightening of wing cylinder attachment fasteners may bind cylinder and cause excessive cylinder wear and/or restrict wing movement.
Bellcrank Assembly to Lift Arm Assembly Fasteners:
Apply Locktite 242™ (Blue) to the threads of the cap screws and tighten the jam nut to 70 lb.-ft. Then place the lock nut on the cap screw and tighten to 70 lb.-ft.
Pivot Frame Assembly:
Install the 1" slotted nut on the threaded end of the special screw and tighten finger tight. Then tighten the nut another 2/3 to 1 full turn and line up a slot in the nut with the cross hole in the special screw. Install the 3/16"x2" cotter pin in the special screw and spread the ends of the cotter pin.
To avoid corrosion during storage, coat the exposed (chrome) portion of the lift and angle cylinders with a light grease.
Install protective caps on quick disconnect ends to prevent corrosion from forming on terminal ends during storage or when plow is disconnected from vehicle.
It is recommended to change the fluid in the hydraulic system once a season.
IMPORTANT: Hydraulic unit comes from factory filled with Type 5606. If additional oil is added it must be compatible with Type 5606.
NOTE: when Type 5606 is not available Exxon UNIVIS J13 or equivalent may be used.
Changing Oil and Cleaning Filter Screen
CAUTION Using the proper oil increases the life expectancy of the most critical part of your unit; the Hydraulic power unit.
NOTE: We recommend cleaning the filter screen at every oil change, this will help ensure maximum life and maximum performance from the pump assembly.
 | WARNING |
|---|---|
| • Allow the system to cool down before draining oil or handling system components. Serious burns can result from contact with hot oil. • Never disconnect any hydraulic line or fitting with the unit in the raised position. Always lower the unit and relieve pressure before removing any lines or caps. FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH. | |
1. Lower plow assembly to ground, put vehicle in park and turn off engine. Turn hand-held controller off.
Ensure engine is OFF and set parking brake before working on plow. Vehicle movement, equipment failure or inadvertent operation of the control switches during maintenance could result in serious injury
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
Figure 2-1
4. Using an oil suction gun or similar tool, remove the oil from the oil reservoir.
NOTE: Be careful to avoid contacting and damaging the filter screen while removing the oil.
5. Loosen the clamp securing the oil reservoir to the pump assembly and remove the oil reservoir being careful not to damage the filter screen while removing the oil reservoir. (See Figure 2-1)
Figure 2-2
Carefully reinstall the filter screens.
CAUTION Do Not use Teflon® tape or pipe compound on hydraulic fittings. These can dislodge and jam valves in the hydraulic system.
14. Fill the hydraulic oil reservoir until the fluid level registers full on oil level mark on oil reservoir.
NOTE: Vehicle must be parked on level ground, Plow must be in the lowered position, and Wings must be folded rearward ("V") in order to properly check the oil level. Checking oil level with plow elevated or with wings straight or folded forward will give wrong reading.
IMPORTANT: This plow is equipped with three (3) disk shoes. Two disk shoes are located at the outboard end of each wing. The third disk shoe is located under the trip springs on the center plow assembly. All three disk shoes must be adjusted equally.
IMPORTANT: To ensure the best function of this snow plow, it is a requirement that all three disk shoes be used at ALL times.
NOTE: After disk shoe adjustment is completed, the float limiter adjustment must be made. See “Float Limiter Adjustment on page 21
NOTE: Wing shoes must not be holding wear strips off the ground.
Figure 2-3
NOTE: Gap may be measured by sliding shims or washers between the ground and/or the center disk shoe or the center wearstrip, then measuring the shim/washer stack. The center disk shoe will need to be adjusted until the disk shoe and center wearstrip both contact the ground at the same time.
must be REMOVED from below the disk shoe mounting tube.
IMPORTANT: If washers must be added, add one washer LESS than the amount the disk shoe was off the ground. If washers must be removed, remove one washer MORE than the amount the wearstrip was off the ground.
6. Raise plow and place suitable blocking under the plow to allow at least eight inches (8") of clearance from the bottom of the center disk shoe to the ground.
7. Lower plow onto blocking.
Keep hands and feet clear of wings and center section when setting blocking and lowering plow. Moving or falling assemblies could result in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
NOTE: If assembling and mounting a snow plow for the first time, the adjustment of the center disk shoe can be done with just the center section mounted on the vehicle, prior to assembling the wings onto the center section of the plow.
WARNING Keep hands and feet clear of wings and center section when setting blocking and lowering plow. Moving or falling assemblies could result in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
14. Adjust each disk shoe assembly by removing disk shoe mounting pin and adding or subtracting washers on the top or bottom of the disk shoe mounting bracket as required according to measurements taken in step #11 (See Figure 2-4)
WASHERS
Figure 2-4
17. Move the wings forward and rearward. If the wing wearstrips and the center wearstrips are not on the ground at all times recheck the position of the wing pivot tubes. The tubes must be vertical, if they are not vertical, the center disk shoe will need to be adjusted.
IMPORTANT: The disk shoes must be properly adjusted prior to adjusting the float limiter. If the shoes are not properly adjusted, the float limiter adjustment cannot be properly made.
1. With the vehicle and snow plow on a smooth, level surface move the wings forward into the “scoop” position and lower the plow to the ground.
Figure 2-5
6. Repeat on other side.
Pivot Assembly Pivot Screws 1. Raise the plow to the full UP position.
Figure 2-6
1. The hex head of the pivot screw must be seated within the hex opening of the retainer plate.
2. Place suitable blocking under A-frame of plow to allow at least 6" of clearance from the blade to the ground.
IMPORTANT: Make sure to position blocking away from cutting edge so that when plow is lowered onto blocking cutting edges do not rest on blocking.
3. Lower plow onto blocking.
Keep hands and feet clear of wings and A-frame when setting blocking and lowering blade. Moving or falling assemblies could result in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
| CAUTION |
|---|
| Cutting edges may be sharp. Always wear gloves and handle cutting edges with care to avoid injury. |
4. Remove mounting bolts holding old center cutting edge. Discard old cutting edges and hardware.
Figure 2-7
2. Install the special 1/4" thick washer on the threaded end of the pivot screw and install the 1" slotted nut finger tight. Then tighten the nut an additional 2/3 to 1 full turn and line up a slot in the nut with the cross hole in the pivot screw. Install a 3/16"x2" cotter pin through the slot in the slotted nut and the cross hole in the pivot screw and spread both cotter pin ends.
Figure 2-8
NOTE: Cutting edge must be replaced when it is worn to the bottom edge of the frame.
NOTE: The blade skin must be retained prior to removing the wing cutting edges. This can be accomplished by using a 6" c-clamp located at the center of the curved portion of the blade skin at the outer end of the wing.
Install new wing cutting edges using new hardware.
NOTE: The trip springs are factory installed and adjusted, but adjustment should be checked during plow set-up and installation.
The springs are properly adjusted when the coils begin to separate.
If readjustment is required:
NOTE: Springs are properly adjusted when two or more coils allow a 0.010" feeler gauge to just pass between the separated coils. (A 3 x 5 post card is approximately the same thickness.)
| CAUTION |
|---|
| • Do not overtighten springs. If more than 0.015" (1/64") gap appears between coil with plow at rest damage could occur to equipment during plowing. • Spring must be installed with open end of top loop facing vehicle. Bottom loop position will vary. |
Figure 2-9
| SAE | 1 or 2 | 5 5.1 5.2 | 8 8.2 |
| Grade |  |  | |
| and Head | No Marks |  |  |
| Markings | |||
| 2 | 5 | 8 | |
| SAE |  |  |  |
| Grade | No Marks |  |  |
| and Nut |  |  | |
| Markings |  |  |
| Grade 1 | Grad | e 2 | Grade 5, 5.1 or 5.2 | Grade 8 | or 8.2 | |||
|---|---|---|---|---|---|---|---|---|
| Lubricateda | Dryb | Lubricateda | Dryb | Lubricateda | Dryb | Lubricateda | Dryb | |
| SIZE | lb-ft | lb-ft | lb-ft | lb-ft | lb-ft | lb-ft | lb-ft | lb-ft |
| 8-32 | 14* | 19* | 22* | 30* | 31* | 42* | ||
| 10-24 | 21* | 27* | 32* | 43* | 45* | 60* | ||
| 1/4 | 2.8 | 3.5 | 4.5 | 5.5 | 7 | 9 | 10 | 12.5 |
| 5/16 | 5.5 | 7 | 9 | 11 | 15 | 18 | 21 | 26 |
| 3/8 | 10 | 13 | 16 | 20 | 26 | 33 | 36 | 46 |
| 7/16 | 16 | 20 | 26 | 32 | 41 | 52 | 58 | 75 |
| 1/2 | 25 | 31 | 39 | 50 | 63 | 80 | 90 | 115 |
| 9/16 | 36 | 45 | 56 | 70 | 90 | 115 | 130 | 160 |
| 5/8 | 50 | 62 | 78 | 100 | 125 | 160 | 160 | 225 |
| 3/4 | 87 | 110 | 140 | 175 | 225 | 280 | 310 | 400 |
| 7/8 | 140 | 175 | 140 | 175 | 360 | 450 | 500 | 650 |
| 1 | 210 | 270 | 210 | 270 | 540 | 675 | 750 | 975 |
DO NOT use these values if a different torque value or tightening procedure is given for a specific application.
Fasteners should be replaced with the same or higher grade. If higher grade fasteners are used, these should only be tightened to the strength of the original. a "Lubricated" means coated with a lubricant such as engine oil, or fasteners with phosphate and oil coatings. b "Dry" means plain or zinc plated without any lubrication
* Values with asterisk are in lb-in.
The Sno-Way snow plow structural elements are warranted to be free from defects in materials and workmanship for a period of five years from date of delivery from an authorized Sno-Way Dealer. The Sno-Way Warranty Registration card for the product must be properly filled out and mailed to Sno-Way within 30 days of date of purchase to obtain benefits of this section of warranty.
Structural elements are defined for this warranty as: Blade frames, A-frames, Swing Frames, vehicle sub frames, and structural components (weldments) of Sno-Way snow plows.
The Sno-Way snow plow nonstructural components are warranted to be free from defects in workmanship for a period of two years from date of delivery from an authorized Sno-Way Dealer. The Sno-Way Warranty Registration card for the product must be properly filled out and mailed to Sno-Way within 30 days of date of purchase to obtain the benefits of this section of warranty.
Nonstructural product components are defined for this warranty as: Blade inserts (Lexan/Hyzod or steel) and the SM01 Hydraulic power system and control module.
ONE YEAR STANDARD LIMITED WARRANTY ACCESORIES / SERVICE PARTS / COMPONENTS.
Sno-Way International, Inc. Warrants accessories, service parts and components purchased separately for a period of one year after original purchase to be free from defects in material and workmanship.
Product as used throughout this warranty means the Sno-Way line of Predator snow plows, straight blades ans "V" blades and components thereof.
To obtain warranty service, promptly return the product or any defective part at your expense to any authorized Sno-Way Dealer during the warranty period. Replacement or repair of defective or inadequate parts shall be performed without charge for labor or materials by such Dealer at his regular place of business during regular business hours after inspection and determination that the warranty applies.
Purchaser shall prepay all freight charges for returning Product or component to Dealer, Sno-Way or any other location designated by Sno-Way.
Note: The Sno-Way Technical Services help line is designed to service Sno-Way Dealers. Sno-Way Technical and Customer Service will help you locate your nearest Sno-Way Dealer.
Please also use the Sno-Way web site with the Dealer locator: www.snoway.com
LEGAL RIGHTS:
Some states do not allow limitations on how long an implied warranty lasts or exclusions or limitations of incidental or consequential damages, so the above limitations or exclusions may not apply fully to you. This w arranty gives you specific legal rights, and you may also have other rights which vary from state to state. All "other" provisions and "limitations" not altered by local law shall continue to apply.
ENFORCEMENT/CONSTRUCTION
This Warranty shall be enforced and construed under the laws of the State of Wisconsin.
Hartford, WI 53027 USA Website: www.snoway.com ©2003 Sno-Way® International
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CAUTION 
