How to Bleed & Replace Brake Fluid on a 2022 Polaris Sportsman 570 EPS

Shop parts for a 2022 Polaris Sportsman 570 EPS ATV.

This MotoSport-exclusive guide covers step-by-step procedures to safely flush, replace, and bleed the brake system on a 2022 Polaris Sportsman 570 EPS. Procedures assume the stock hydraulic brake system with one master cylinder and four-wheel hydraulic discs. Read through completely before starting and gather tools and supplies.

What you need

  • Fresh brake fluid as specified by Polaris (follow owner’s manual; DOT 4 commonly used — verify before purchase)
  • Clear bleeder hoses, catch bottle, and tubing clamp
  • Appropriate wrenches for bleeder screws (usually 8mm or 10mm) and master cylinder lid hardware
  • Turkey baster or fluid syringe to remove old fluid from reservoir
  • Clean rags, nitrile gloves and safety glasses
  • Jack or ramps and stands to lift the ATV safely (if needed)
  • Optional: pressure bleeder or vacuum bleeder for faster, cleaner service
  • Brake cleaner and container for used fluid disposal

Model notes for the 2022 Polaris Sportsman 570 EPS

  • The EPS indicates Electronic Power Steering; EPS does not change brake bleeding procedure but be careful working near wiring and connectors for the EPS module.
  • Parking/hand brake components (if equipped) are mechanical and separate from hydraulic bleeding. Engage parking brake for safety when raising wheels.
  • Master cylinder reservoir is accessible near the handlebar area; keep reservoir cap sealed when not adding fluid to avoid contamination and moisture absorption.
  • Polaris recommends using the specified fluid in the manual. Moisture contamination can lead to poor braking performance in this sealed hydraulic system.

Preparation

  1. Park on level ground, engage parking brake and remove key. If lifting the ATV, secure on stands so wheels move freely.
  2. Clean around master cylinder reservoir cap and brake calipers to prevent dirt entry.
  3. Remove reservoir cap and diaphragm; use a turkey baster to remove as much old fluid from the reservoir as possible without spilling. Wipe inside clean.
  4. Top reservoir with fresh fluid to the recommended level. Keep the cap off but cover with a clean plastic bag to slow moisture pickup during the procedure.
  5. Inspect brake lines, hoses, and calipers for leaks, damage, or seized pistons before bleeding.

Bleeding sequence

Use this recommended sequence to move from the wheel farthest from the master cylinder to the nearest. On the Sportsman 570 the common sequence is:

  • Right rear (rear passenger side)
  • Left rear (rear driver side)
  • Right front
  • Left front

If you’re uncertain which caliper is farthest from the master cylinder on your unit, follow the same pattern starting with the rear calipers then the front calipers.

Manual bleed procedure (single-person)

  1. Attach a clear hose to the bleeder screw and route to a catch bottle partially filled with fresh fluid to avoid drawing air back in. Clamp the hose near the caliper when not actively bleeding.
  2. Have a helper slowly pump the brake lever/pedal several times and hold it down. Open the bleeder screw 1/4 to 1/2 turn until fluid flows into the hose. Close the screw, then release the lever/pedal. Repeat until clear fluid with no bubbles flows and feel is firm.
  3. Keep the master cylinder reservoir topped between cycles to prevent introducing air into the system.
  4. Repeat for each caliper in the sequence. Tighten bleeder screws to a snug fit when finished; do not over-torque.
  5. After the final caliper bleed, pump the brake lever/pedal to confirm a firm feel. Check reservoir level and top to the proper mark, then replace diaphragm and cap.

One-person vacuum/pressure bleed (recommended)

  1. Attach a vacuum bleeder to the bleeder screw or a pressure bleeder to the master cylinder reservoir following the tool manufacturer’s instructions.
  2. Operate the bleeder and open each caliper bleeder screw one at a time using the same sequence until fluid runs clear and bubble-free.
  3. Monitor reservoir level closely; refill as needed. Close bleeders and remove tools when complete.

Flush vs. partial replacement

For a full flush, continue bleeding each caliper until new fluid exits with no discoloration. For periodic maintenance, two to three reservoir top-offs while bleeding can refresh the system but will not be a full fluid exchange. MotoSport recommends a full flush if fluid is dark, contaminated, or older than the interval in the owner’s manual.

Final checks

  • Confirm no fluid leaks at bleeder screws, calipers, lines, or the master cylinder.
  • Ensure brake lever/pedal feel is firm and consistent. If spongy, repeat bleeding.
  • Wipe any spilled brake fluid from painted surfaces immediately with water then clean with appropriate cleaners & protectants; brake fluid damages paint and plastics.
  • Properly dispose of used brake fluid per local regulations.
  • Test ride at low speed in a safe area to confirm braking performance before regular use.

Safety & maintenance tips specific to this ATV

  • Do not mix different types of brake fluid. Use the type specified for your Sportsman 570 to avoid seal damage and degraded performance.
  • Because EPS wiring and connectors are nearby, cover electrical components to prevent fluid contact; brake fluid can damage connectors and coatings.
  • Store brake fluid in a sealed container; brake fluid is hygroscopic – it absorbs moisture from air which reduces its boiling point.
  • If you detect persistent brake fade or soft pedal after bleeding, inspect caliper pistons and pads for contamination, and have the system pressure-tested by a qualified technician.

Following these steps will keep your 2022 Polaris Sportsman 570 EPS braking system responsive and reliable. For OEM-equivalent replacement parts and fluids, start with the parts page linked above to ensure compatibility with your MMY.

Related Shopping Categories

Shop Brake Fluid for a 2022 Polaris Sportsman 570 EPS ATV.

Shop Brake Bleeders for a 2022 Polaris Sportsman 570 EPS ATV.

Shop Brake Pads for a 2022 Polaris Sportsman 570 EPS ATV.

Shop Brake Lines for a 2022 Polaris Sportsman 570 EPS ATV.

Shop Brake Tools for a 2022 Polaris Sportsman 570 EPS 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.