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TM  OWNER’S MANUAL28 SERIES SNOW PLOW FOR PLOW SERIAL NUMBERS AFTER 28D10132997100438C TABLE OF CONTENTSPage SAFETY ...................................................................................................................... 3 PLOWING OPERATION............................................................................................. 5 Operating Classes ............................................................................................ 5 Before The Season Begins .............................................................................. 5 Transporting Vehicle With Blade Attached..................................................... 5 Plowing Like A Pro ........................................................................................... 6 Using The Down Pressure Hydraulic System ................................................ 6 Plowing Roadways ........................................................................................... 6 Clearing Parking Lots....................................................................................... 6 Mounting Snow Plow To Vehicle ..................................................................... 7 Installing The Cylinder Lock Clamp................................................................ 9 Removing Snow Plow From Vehicle ............................................................... 9 Plow Storage ................................................................................................... 11 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.................................................................................... 20 Float Limiter Adjustment ............................................................................... 22 Pivot Assembly Pivot Screws ........................................................................ 23 Cutting Edge ................................................................................................... 23 Trip Spring Adjustment .................................................................................. 24 WIRING HARNESSES W1 Wire Harness - Vehicle............................................................................. 29 W2 Wire Harness - Control Box "B".............................................................. 29 W3 Wire Harness - Control Box "A".............................................................. 30 W4 Wire Harness - Vehicle End Control ....................................................... 30 W5 Wire Harness - Vehicle End ..................................................................... 31 W6 Wire Harness - Pump End Control.......................................................... 31 W7 Wire Harness - Pump End Main .............................................................. 32 W8 Wire Harness (No Longer Used) ............................................................. 33 W9 Wire Harness - Battery Power ................................................................. 33 W10 Wire Harness - Battery Ground............................................................. 33 W11 Wire Harness - Solenoid Switch Power................................................ 33 W12 Wire Harness - Jackstand Switch Jumper ........................................... 33 W13 Wire Harness - Jackstand Switch Jumper ........................................... 33 W14 Wire Harness - Control Box Jumper (2 Req.)....................................... 33 WARRANTY................................................................................... Inside 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.  WARNINGFAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
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| NAME | DEALER | |||
|---|---|---|---|---|
| PHONE ( ADDRESS CITY NAME | ) – STATE ZIP ORIGINAL PURCHASER | (FILL IN) | ||
| PHONE ( ADDRESS 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 97100465.
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 a 12VDC Motor, a Hydraulic Pump rated at 1.9 GPM @ 1650 PSI, and a Valve Body containing Seven (7) Electric Solenoids, three
(3) Pressure Switches and five (5) Pressure Relief Valves. The fluid supply line for the pump is submerged in a 2.0 quart capacity Reservoir and is equipped with a fine mesh Intake Filter.
The Valve Body directs hydraulic fluid to operate five hydraulic circuits, raise, lower, angle left side, angle right side, and down pressure. The angle and lift circuits receive fluid under pressure. Normally the lower circuit is un-powered, however, a slight pressure is generated in this circuit as fluid returns to the reservoir.
This unit is equipped with a DOWN PRESSURE system that allows the operator to selectively switch the system to provide additional Hydraulic force to the lowering of the plow.
The angle left side or angle right side hydraulic circuits receive priority over the raise hydraulic circuit. If the raise circuit is operated while angling the blade wings, the blade will angle but will not raise until the Angle Switches are released. Angling the blade wings while lowering the blade will still allow the wings to angle and to lower because hydraulic pressure is not needed to lower the blade.
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.
Operating the Raise Switch energizes the 12VDC Motor and de-energizes the Raise/Lower Solenoid. Hydraulic fluid under pressure is then directed through a one way Check Valve to the raise side of the lift cylinder.
Releasing the Raise switch de-energizes the 12 VDC motor. The raise circuit is protected by a pressure relief valve set to relieve system pressure at approximately 2100 PSI. Typically, pressure is relieved when the hydraulic lift cylinder reaches the full UP position.
Operating the Lower Switch energizes the Raise/Lower Solenoid (if down pressure system is off), lowers the blade and establishes a Float Circuit. The Float Circuit allows fluid to enter and exit the Raise Cylinder allowing the blade to follow the contours of the ground.
IMPORTANT: The lower valve is closed by spring pressure. If it does not close completely against the valve seat, the plow can slowly lower after the raise switch is released. If this occurs, cycle the plow through a raise and lower cycle a few times to flush out anything that may be between the valve and seat, this also allows the valve and valve seat to mate and seal.
Each Wing can be angled forward or rearward independently by operating the Wing Angle Switch for either the Right or Left Wing. Operating the Wing Angle Switch energizes the 12 VDC Motor and either the Extend or Retract Solenoid for the Wing, which directs hydraulic fluid, under pressure, to either the base end (Extend) or rod end (Retract) of the Wing Cylinder, which then moves the Wing forward or rearward. Each Wing Angling Circuit is protected by a crossover Relief Valve set at 1500 psi as well as the System Relief Valve set at 2100 psi and a Wing Cylinder Relief Valve set at 2150 psi.
Current to the Down Pressure Rocker Switch is supplied through the lower position of the Raise/Lower Switch.
Positioning the Down Pressure Rocker Switch to ON supplies power to the Indicator Light, energizes the Four-way Solenoid Valve, supplies power to the Pressure Switch and de-energizes the Raise/lower Solenoid Valve.
The Four-way Solenoid Valve, when energized, directs fluid flow to the down side of the Lift Cylinder. When de-energized, hydraulic pressure is equalized in the Lift Cylinder allowing the Plow to float and follow the contour of the ground.
The Pressure Switch senses hydraulic pressure in the down side of the Lift Cylinder. When pressure falls current is supplied to the DC Motor and hydraulic pressure is supplied to the down side of the Lift Cylinder. When pressure increases the Pressure Switch opens and stops current flow to the DC Motor.
Current to energize the DC Motor is supplied through the DC Motor Start Solenoid. Current to activate the Start Solenoid comes from the Raise/lower Switch, left and right Wing Angle Switches, or the down pressure system Pressure Switch.
Raise/Lower Switch:
Used to raise or lower the blade.
Left Wing Angle Switch:
Used to angle the left wing forward and rearward.
Right Wing Angle Switch:
Used to angle the right wing forward and rearward.
Down Pressure Rocker Switch:
Used to activate the down pressure system. Must be in off position for float system to operate.
Down Pressure On Indicator Light:
Comes on when down pressure switch is turned on. The light indicates switch position only, it does not indicate proper system operation.
The 28 Series Sno-Way Plow is specifically designed for heavy duty Snow Plowing with full size 1/2, 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.
Transporting Vehicle With Blade Attached
Ensure ignition switch is OFF before installing or removing the cylinder lock clamp. Equipment failure or inadvertent operation of the control switches could allow the plow blade to fall, resulting in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
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.
2. Always transport the plow with the wings fully folded to the rear to keep the transport width to a minimum.
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.
Plowing Like A Pro
WARNINGFAILURE 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.
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 Down 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.
Mounting Snow Plow To Vehicle
VEHICLES EQUIPPED WITH AIR BAGS!
Certain Vehicles equipped with Air Bags cannot be equipped with Snow Plows because of the possibility of the Air Bag being deployed if the Snow Plow hits an obstruction. Before attempting to install a Snow Plow on a vehicle equipped with Air Bags, consult with the vehicle manufacturer to be sure that Snow Plow operation will not result in inadvertent deployment of the vehicle air bag.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
1. Move the vehicle to the Snow Plow and position it so that the mounting points at the rear of the A-Frame are within 3-4 inches of the lower mounting points of the Subframe on the vehicle (It is much easier to move the vehicle instead of the plow).
Be sure all plow functions are OFF on ALL plow controls in the vehicle cab and the Raise/Lower Rocker Switch on the Pump Cover is in the OFF position before making ANY electrical connections.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
2. Remove the protective Plastic Covers from the Snow Plow Wiring Harnesses and store them inside the vehicle for installation when the plow is removed.
Figure 1-1
3. Remove the Metal Caps from the vehicle end of the Wiring Harnesses by rotating them counterclockwise and store them as shown in Figure 1-1, if Metal Caps are chained to the Harness Plug Bracket. If Metal Caps are not chained to the brackets store the Metal Caps in the vehicle for future use.
CAUTION NEVER use pliers or any other tool to force the Connector halves together.
When using the raise/lower Rocker Switch on the Pump Cover to raise or lower the Plow A-Frame be especially careful of the movement of the light bar, if equipped, which occurs during raising and lowering of the A-Frame on the Jackstand.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
7. Raise the rear of the A-Frame (using the Rocker Switch on the pump cover) to ensure that the A-Frame is higher than the Subframe mounting points. The plow can then be manually moved into position for connecting the lower Hitch Pins. Move the plow manually by grasping one end of the blade and moving one side and then the other side. Again, if the plow is more than 3-4 inches from proper alignment, move the vehicle - it’s easier. But remember to disconnect the electrical connections BEFORE backing away from the plow to avoid stretching and damaging the electrical Wiring Harness. (See Figure 1-2)
CAUTION NEVER move vehicle while plow is connected electrically.
8. Lower the A-Frame into alignment with the lower Hitch Pin mounting holes of the vehicle Subframe and install the two lower Hitch Pins. Secure with Lynch Pins. (See Figure 1-4)
Figure 1-3
NOTE: If the plow and vehicle are not level with each other, install one lower Hitch Pin and then, using the Rocker Switch on the pump cover, (See Figure 1-3) adjust the A-Frame height to allow installation of the second lower Hitch Pin.
9. After the lower Hitch Pins and Lynch Pins have been installed, place the Rocker Switch in the lower position to allow the Jackstand to be raised off the ground. Then rotate the Jackstand forward and upward and latch it in the transport storage position with the Spring Pin. (See Figure 1-2)
IMPORTANT: The end of the Spring 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.
10. Raise the Lift Link and Light Bar manually to align the upper Hitch Pin mounting lugs and slide the upper Hitch Pin into place. Install the Lynch Pin to retain the Hitch Pin. (See Figure 1-4)
Figure 1-2
Figure 1-4
Installing The Cylinder Lock Clamp
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
4. Position the Cylinder Lock Clamp around the exposed (chrome) portion of the Lift Cylinder and install the Pins. Install the Hairpin Cotters Into the Pins. (See Figure 1-5)
Choose a location for 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.
1. Drive vehicle to the desired Snow Plow storage area. It is recommended that the plow be stored in a dry protected area.
NOTE: Plow should be thoroughly cleaned of all grime and road salt before it is put into storage
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
4. Turn vehicle ignition switch to run position only.
5. With the Snow Plow attached to the vehicle and lowered to the ground, place the raise/lower Rocker Switch on the Pump Cover in the lower position. Place the Up/down Switch on the Plow Controller in the cab of the vehicle in the down position and activate the Down Pres sure Switch on the Plow Controller. (See Figure 1-6)
Figure 1-6
When using the raise/lower Rocker Switch on the Pump Cover to raise or lower the plow A-Frame, be especially careful of movement of the Light Bar which occurs during raising and lowering of the A-Frame on the Jackstand.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
IMPORTANT: IF THE SNOW PLOW IS EQUIPPED WITH LIGHTS, DISCONNECT THE LIGHT WIRING HARNESS AT THIS TIME.
8. Pull the Lynch Pin from the upper (center) Hitch Pin and slide Hitch Pin out to disconnect the Lift Arm and Light Bar from the upper (center) hitch point of the Sub- frame. (See Figure 1-7)
Figure 1-7
Keep hands and feet clear of Wings and A-Frame when detaching plow. Moving or falling assemblies could result in serious injury.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
Figure 1-8
Figure 1-9
NOTE: Place protective Metal Caps on the vehicle half of the quick disconnects and place the plastic storage Covers (normally kept in the vehicle) on the Snow Plow half of the wiring harness connectors. Tuck the Snow Plow end of the plugs in an area of the Snow Plow where they are not exposed to potential damage such as crushing or corrosion.
CAUTION Never use pliers or any other tool to separate the
wiring harness connector halves.
14. After all mechanical and electrical connections have been disconnected, back the vehicle away from the Snow Plow.
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 Numbers.
G. Pump Serial Number.
This information should be recorded on page 2 of this Owners Manual.
4. Check oil level in hydraulic system reservoir.
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Plow will not lift (Motor runs) | Hydraulic fluid level low | See Maintenance Section |
| Defective Raise/Lower Switch | 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/lower 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 | |
| Diode in vehicle harness defective or missing | 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 | |
| Motor continues to run and will not shut-off | Motor Solenoid defective | Refer to Dealer |
| Machine defective | 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 worn or not seating properly | Refer to Dealer | |
| O-Rings between endhead and reservoir worn 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 lower solenoid valve | Cycle raise and lower system to flush debris |
| Lower 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 | |
| Raise/lower solenoid valve sticking | Refer to Dealer | |
| Seals O-Ring(s) on raise/lower solenoid valve or down pressure solenoid valve damaged | Refer to Dealer | |
| Current available at raise/lower solenoid without switch function | Refer to Dealer | |
| Raise /lower ram defective allowing movement in one direction only | 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 raise/lower Solenoid | Refer to Dealer | |
| Raise/lower solenoid valve sticking | Refer to Dealer | |
| Raise/lower 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 down pressure switch in Control Box | 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 | |
| Crossover relief valve pressure setting too low | 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 |
| PROBLEM | PROBABLE CAUSE | CORRECTIVE ACTION |
|---|---|---|
| Blade wing will not move, but plow raises when trying to move wings | Main power solenoid defective or sticking | Refer to Dealer |
| Low or no current available at main power solenoid valve | Refer to Dealer | |
| Blade wing moves very slowly | Hydraulic fluid level low | See Maintenance Section |
| Crossover Relief Valve defective or sticking | Refer to Dealer | |
| Crossover Relief Valve pressure setting to low | 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 25 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 charged 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.
CAUTIONChanging 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 and magnet at every oil change, this will help ensure maximum life and maximum performance from the pump assembly.
FAILURE TO HEED CAN RESULT IN SERIOUS INJURY OR DEATH.
1. Lower plow assembly to ground, put vehicle in park and turn off engine.
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.
2. Loosen four Nylock Nuts attaching Pump Cover to frame. Remove the pump cover taking care not to disconnect wires to Rocker Switch mounted in Pump Cover.
Figure 2-1
3. Remove the Filler/Breather Cap from the Reservoir. (See Figure 2-2)
CAP SCREW
Figure 2-2
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.
Figure 2-3
NOTE: Do not loosen fitting in cylinder body. Loosen only at connection with hose.(See Figure 2-4)
Figure 2-4
CAUTION Do Not use Teflon® tape or Pipe Dope on hydraulic fittings. These can dislodge and jam valves in the hydraulic system.
16. 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 22
Figure 2-5
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.
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 2-6)
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.
2. Loosen the 5/8" Jam Nut on the top of the float limiter
Figure 2-6
Adjusting Screw.
Pivot Assembly Pivot Screws 1. Raise the Plow to the full UP position.
Figure 2-8
1. The hex head of the Pivot Screw must be seated within the hex opening of the Retainer Plate.
Figure 2-9
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.
NOTE: Cutting Edge must be replaced when it is worn to the bottom edge of the frame.
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 and Short Inner Wing Cutting Edges to Blade. Discard old Cutting Edges and hardware.
IMPORTANT: Do not remove Long Wing Cutting Edges at this time. Short Inner Cutting Edges must be installed before removal of Long Wing Cutting Edges.
Figure 2-10
5. Install new Short Inner Cutting Edges using new hardware.
NOTE: The Blade Skin must be retained prior to removing the Long 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. The Short Inner Cutting Edges will retain the inner end of the Blade Skin.
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
| 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.
Cyl1Cyl2Cyl3Down CylinderCylinderCylinderPressure Left Angle Right Angle Raise/Lower Switch
NC
| A Solenoid | B Solenoid | C Solenoid | D Solenoid | E Solenoid | F Solenoid | G Solenoid |
| Main Power | Down | Right Extend | Right Retract Left Retract | Left Extend | Down Press | |
WIRING SCHEMATIC
P3 Switch Pressure 525 PSI
28
C5
A - 11Blu B - 12Yel C - 13Tan D - Plug
C4
A - 5Red B - 6Grn C - 7Blu/Wht D - Plug
C1
1 - Blank 2 - 8Org 3 - 9Vio 4 - 10Brn
Molded Connector Terminal Terminal
(S.N. 97100800 & After)
F1
F6 Flag Connector
F9
C7
1 - 0Blk 2 - 4Red 3 - 1Red/Blk 4 - 6Grn
Flag Connector
5 - 8Org 6 - 9Vio
F12 Flag Connector
C7
F13 Bullet
Flag Connector
F15
NOTE: On Plows with S.N.97100800 and higher W2 and W3 Wire Harness are assembled as a single harness.
C1
1 - Blank
Terminal
Terminal
C4 Packard Connector C4
A - 5Red B - 6Grn C - 7Blk D - Plug
C5
A - 11Blu B - 12Yel
C - 13Tan R - 2Red
C6
D - Plug
S - 0Blk T - 5Red U - 0Blk V - 6Grn W - 7Blk
X - 11Blu 0.380 Ring
Terminal
Y - 12Yel
Z - 13Tan
C2
R6
C6
Quick Disconnect
Q9 Quick Disconnect
Quick Disconnect
32
W9 Wire Harness - Battery Power
2Red
W10 Wire Harness - Battery Ground
0Blk
R12 R13
W11 Wire Harness - Solenoid Switch Power
2Red
R10 R11
1Blu
S9 Q14 Slip On Quick Disconnect Connector
S10
S11
Slip On
Connector
F18
F17
Flag Connector
33
SNO-WAY Warrants to the original retail purchaser for a period of one (1) year from the date of delivery from an authorized SNO-WAY Dealer that your new SNO-WAY Plow is free from defects in materials and workmanship if properly set up and operated in accordance with the recommendations set forth in SNO-WAY’s Set-up and Operator’s Manuals. This warranty does not cover normal wear items such as shoes and wearstrips.
SNO-WAY Plows used by a dealer as a demonstrator shall be warranted only for the period of one (1) year from the date of delivery to said dealer and the first subsequent purchaser shall be entitled to the remaining warranty protection.
This warranty shall not apply to any item of equipment which has been repaired or altered outside the SNO-WAY factory or authorized SNO-WAY dealership or which has been subject to misuse, negligence or accident: neither shall it apply to equipment which has not been operated in accordance with SNO-WAY printed instructions or has been operated beyond the SNO-WAY’S recommended snow plow operating class.
To validate this warranty, your dealer and you must complete the enclosed Warranty Registration Card at time of purchase of the plow and return the Factory copy to SNO-WAY International, Inc. within ten (10) days following delivery of your new Plow.
To obtain warranty service, promptly return your Plow 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.
EXCLUSIONS OF WARRANTY
Except as otherwise expressly stated herein, SNO-WAY makes no representation of warranty of any kind expressed or implied, including merchantability or fitness for particular purpose in respect to the equipment.
SNO-WAY shall not be liable for incidental or consequential damages for any breach of warranty, including but not limited to loss of use, inconvenience, rental or replacement equipment, loss of profits or other commercial loss.
No agent, employee or representative of SNO-WAY has any authority to bind SNO-WAY to any affirmation, representation or warranty concerning its equipment except as specifically set forth herein.
Certain limitations expressed herein are excludable in accordance with provisions of local law. Such limitations shall be deemed struck if such local law is applicable. All other limitations and provisions shall continue to apply.
SNO-WAY INTERNATIONAL, INC.
844 West State Street Hartford, WI 53027 USA Phone (262) 673-7200 FAX (262) 673-7409 ©1999 Sno-Way® International
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CAUTION 
