SubZero Plow System - Rocky Mountain ATV/MC

SubZero Plow System
Safety Instructions
For your safety and the safety of others, we have provided some basic safety instructions. We have also
included safety stickers on the plow itself as a reminder. We recommend that you read and understand
all safety instructions before operating the plow. It is not possible to warn you about all potential safety
risks when using this plow. We suggest operating cautiously and using good judgment in addition to
reading and understanding the following:
SEVERE INJURY, DEATH, OR EQUIPMENT DAMAGE MAY RESULT IF SAFETY INSTRUCTIONS ARE NOT
FOLLOWED.
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Read snowplow instructions, ATV operators manual, and safety decals before operating.
Wear safety protection as recommended in ATV operators manual.
When plowing snow or dirt into a pile, start backing up before raising the blade.
Keep bystanders away from plow or ATV while plowing or stationary
When blade is not in use, stop ATV engine, lock brakes, and lower blade to the ground.
Do not exceed 5 MPH with blade installed.
Operate with extreme caution on slopes, steep grades, and rough terrain.
Do not allow riders on blade or ATV while moving or stationary
Be aware of hidden objects under the snow as they may violently alter the speed and
direction of the ATV.
Assembly Instructions
Thank you for purchasing the Tusk SubZero Plow System. Assembly instructions are not difficult but
should be followed precisely and in order. Two people and proper tools will make the assembly go
smoothly. Look at the illustration on page six to become familiar with the different components.
Tools needed:
 10mm allen wrench
 14mm end wrench/socket
 15mm end wrench/socket
 18mm end wrench/socket
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19mm end wrench/socket
24mm end wrench/socket
pliers
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Assembly:
1. Mount Push Pivot to ATV Push Tube
 Orient Push Pivot to Push Tube
 Using M16x40mm allen head bolt, insert from bottom up at front pivot—through push tube,
through push pivot, through blade angle bracket, through washer, and into M16 nylock nut.
Leave loose.
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Using M16x40mm allen bolt, insert from top down at rear of blade angle bracket--through
washer, through blade angle bracket, through spacer, through push tube, through washer, and
into M16 nylock nut.
Tighten both bolts. The front pivot bolt needs to be tightened, then backed off ½ turn.
2. Attach blade to push pivot
 Install 4-way tilt stop by installing M10x30mm hex flange bolt--through 4-way tilt stop, through
push pivot, through washer, and into M10 nylock nut. Repeat on the other side. Orient the stops
the same on both sides. See “Adjustments” section for more information.
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Orient blade to push pivot. Using M12x35mm hex flange bolt--insert through blade, through
push pivot, through bushing, through washer, and into M12 nylock nut. Leave hand tight.
Repeat on other side of the blade. IMPORTANT: The bolt needs to load the bushing and the
blade, not the push pivot. Make sure the bushing is aligned and goes through push pivot.
Tighten the bolts. Take care to keep the bushing aligned while tightening.
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Install eyebolts up through blade, through washer, and through 3/8 inch lock nut. Leave loose.
Attach trip springs to push pivot and through eye bolts. It is important to install springs as
shown. The lower hooks need to open towards the ground.
Tighten eye bolts until the trip springs have a light tension. These do not need to be very tight.
See “Adjustments” section below for more information.
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Install gravel skids, skid spacers, and washers through brackets on the blade and secure with a
hairpin clip. See “Adjustments” section for more information.
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3. Attach snow plow assembly to ATV
 Mount Tusk SubZero Snow Plow assembly to the Tusk Plow Mount Plate that has been
previously mounted to the ATV. Slide the push tube under the ATV. Line up the mounting tabs
with the plow mount bracket and insert the straight pin and hairpin clip.
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Attach winch cable to blade angle bracket with straight pin and hair pin. Position the pin and
winch cable in the most vertical position.
4. Adjustments
 The 4 way tilt stop is adjustable. It can be adjusted by loosening the trip spring tension,
removing the bolt holding the 4 way tilt stop and rotating it ¼ turn increments. Adjust it to your
preferences. A steeper attack angle (top of plow moved forward) is better for ice and light snow.
A shallow attack angle works better for deep snow (top of blade moved back). We have found
that a moderate attack angle is good for all-around.
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The trip spring tension is adjustable. Increase the tension and resulting force it takes to trip the
blade by tightening the trip springs/eye bolts. We like to run the springs as loose as possible
without tripping the blade during normal plowing. This will let the blade trip and transfer
minimum impact to the machine.
The winch lift pin is adjustable. Choose the pin location that does not interfere with the blade
angle adjustment pin.
The gravel skids are adjustable. You can adjust the height of the skids by placing more or less
rubber spacers and washers between the skid bracket and the skid itself. Place the balance of
spacers/washers on top of the bracket.
The blade angle is 5-position adjustable. Adjust it by lifting the plow slightly off the ground,
lifting up on the “L” shaped pin, disengaging push pivot from push tube, and rotating the blade
to the desired sweep angle. Release the “L” shaped pin making sure the pin engages in the
desired slot.
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