How to Bleed & Replace Brake Fluid on a 2019 Polaris Sportsman Touring 570

Shop parts for a 2019 Polaris Sportsman Touring 570 ATV.

This MotoSport guide walks you through safe, complete brake-fluid replacement and bleeding for the 2019 Polaris Sportsman Touring 570 (MMY: Polaris;SPORTST570;2019). Follow every step and warning closely & use the specified DOT fluid. If you’re unsure at any point, consult a professional mechanic.

Why replace and bleed brake fluid

Brake fluid absorbs moisture over time, reduces boiling point, causes spongy lever feel, and accelerates internal corrosion in calipers and master cylinder. Replacing fluid and properly bleeding restores firm braking and extends component life.

Tools & supplies

  • DOT 4 brake fluid (Polaris recommends DOT 4; check reservoir cap label)
  • Brake bleeder kit or clear tubing and a catch bottle
  • Wrench set (8mm/10mm/11mm typical for bleeder nipples and caliper bolts)
  • Line clamp or hose clip
  • Clean rags and disposable gloves
  • Brake cleaner
  • Torque wrench
  • Sand or drip tray to protect surfaces
  • Assistant (recommended) or one-way vacuum bleeder

Safety & prep

  • Work on a level surface with the engine off and key removed.
  • Wear eye protection & gloves. Brake fluid damages paint & plastics; protect bodywork.
  • Loosen wheel lug nuts slightly if wheel removal is required. Use jack stands or the ATV jack and secure the vehicle before removing wheels.
  • Identify front and rear caliper bleeder screws. Keep a diagram or photo of hose routing for reassembly.

Reservoir location & checking

The Sportsman Touring 570 has a combined master cylinder reservoir accessible near the handlebar area. Clean the reservoir cap and surrounding area before opening to prevent contamination. Note the reservoir has max/min marks — never let the level drop below the minimum during bleeding.

Step-by-step: Full brake-fluid replacement & bleeding

1. Remove old fluid from reservoir

  • Use a turkey-baster, syringe, or fluid pump to remove as much old fluid from the reservoir as possible without introducing air.
  • Dispose of old fluid per local regulations.

2. Top with fresh fluid

  • Fill the reservoir to the maximum mark with fresh DOT 4 fluid. Keep the cap loosely on to limit contamination but allow overflow.

3. Wheel removal & access (recommended)

  • For thorough replacement, remove wheels to access calipers and bleeder nipples easily. Support the ATV securely.

4. Bleeding order

Follow this bleeding sequence to minimize trapped air: start with the caliper farthest from the master cylinder and finish with the closest. For the Sportsman Touring 570 typical order is:

  1. Rear passenger-side (farthest)
  2. Rear driver-side
  3. Front passenger-side
  4. Front driver-side (closest)

Confirm which side is farthest on your specific machine by visual routing of brake lines from the master cylinder.

5. Bleed each caliper (with assistant)

  1. Attach clear tubing to the bleeder nipple and route into a catch bottle partly filled with clean brake fluid to prevent air re-entry.
  2. Have an assistant slowly depress and hold the brake lever/pedal while you open the bleeder nipple about 1/4 turn. Fluid & air will flow into the bottle.
  3. Close the nipple before the assistant releases the lever/pedal to avoid sucking air back in.
  4. Repeat until fluid runs clear and air bubbles stop appearing. Keep reservoir topped between cycles; never run dry.
  5. Torque bleeder nipple to spec (light snug, typically 8-12 ft-lbs depending on nipple size) after final close and wipe any spilled fluid immediately.

6. Alternative: Vacuum or pressure bleeder

If working solo, use a one-way vacuum bleeder on each bleeder nipple or a pressure bleeder on the reservoir. Follow the tool manufacturer's directions and keep reservoir level monitored. Vacuum bleeding is slower but effective.

7. Final reservoir fill & cap

After all calipers are bled, top the reservoir to the maximum line, clean the cap sealing surface, and secure the cap. Ensure any vent hoses are correctly routed and unobstructed.

8. Reinstall wheels & torque

Reinstall wheels, torque lug nuts to Polaris spec, and lower the ATV to the ground.

9. Brake lever/pedal bedding & test

  • With the ATV on the ground, cycle the brakes several times to check for firm feel. If soft or spongy, repeat bleeding steps.
  • Perform a slow-speed test ride in a safe area to confirm braking performance before normal use.

Torque & fastener notes

  • Caliper mounting bolts — torque to Polaris spec (check service manual). If unknown, tighten to manufacturer chart values for similar fasteners, then verify with manual.
  • Bleeder nipple snug torque is low — avoid over-torquing, which can strip the nipple.

Model-specific tips for the 2019 Sportsman Touring 570

  • The Sportsman Touring 570 uses DOT 4 in the OEM system; do not mix DOT 3/5.1 unless specified by Polaris. Using DOT 5 silicone is not compatible.
  • Reservoir placement near the handlebars means fluid level can change with handlebar position; keep the machine level when checking levels.
  • The Touring model may have longer brake lines and additional routing around the passenger seat area — inspect lines for chafing, kinks, or worn clips while bleeding.
  • ABS is not present on this base 570; bleeding is standard single-circuit per caliper routing. If your machine has an aftermarket ABS or linked-brake mod, consult the system-specific bleed sequence before proceeding.
  • If you find contaminated or rusty caliper internals, rebuild or replace calipers; contaminated fluid can indicate internal corrosion not fixed by bleeding alone.

Common issues & troubleshooting

  • Persistent sponginess: likely trapped air or a leak. Recheck hose connections, banjos, and bleeder nipple seating.
  • Brake drag after bleeding: check bleeder nipples fully closed and sliding pins/cable free. Ensure caliper pistons are not over-extended when compressing to reset pads.
  • Leaking at banjo bolt or hose: replace crush washers and torque to spec.

Maintenance interval

Replace brake fluid every 1-2 years or sooner if exposed to heavy use or wet conditions. Regular inspection of lines, pads, and calipers at each service keeps the Sportsman Touring 570 stopping reliably.

Disposal

Used brake fluid is hazardous. Collect and dispose of it at an approved recycling or hazardous-waste facility.

Perform bleeding methodically and keep the reservoir topped; proper bleeding restores braking confidence and extends component life on your 2019 Polaris Sportsman Touring 570.

Related Shopping Categories

Shop Brake Fluid for a 2019 Polaris Sportsman Touring 570 ATV.

Shop Brake Bleeders for a 2019 Polaris Sportsman Touring 570 ATV.

Shop Brake Pads for a 2019 Polaris Sportsman Touring 570 ATV.

Shop Brake Lines for a 2019 Polaris Sportsman Touring 570 ATV.

Shop Brake Tools for a 2019 Polaris Sportsman Touring 570 ATV.

Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.