How to Bleed & Replace Brake Fluid on a 2019 Polaris Sportsman Touring 570 EPS
Shop parts for a 2019 Polaris Sportsman Touring 570 EPS ATV.
Overview
This MotoSport guide shows a professional, repeatable method to flush old brake fluid and bleed the hydraulic system on a 2019 Polaris Sportsman Touring 570 EPS. The procedure applies to hydraulic disc brakes on this MMY ATV. Use DOT 4 brake fluid unless the owner’s manual specifies otherwise. Brake fluid is hygroscopic; replace it every 1 to 2 years or whenever contamination or spongy pedal feel occurs.
Safety & prep
- Work on a level surface, engine off, parking brake engaged, and key removed.
- Wear eye protection and nitrile gloves. Brake fluid damages paint and plastics.
- Have a friend assist or use a vacuum/pressure bleeder for one-person operation.
- Gather tools: DOT 4 brake fluid, clear plastic tubing, catch jars, wrench set and correct size flare/bleeder wrench, turkey baster or fluid syringe, clean rags, jack & jack stands or ATV lift, brake parts cleaner.
- Locate the brake fluid reservoir(s) and bleeder nipples. On the Sportsman Touring 570 EPS the hydraulic reservoir services the brakes; identify the farthest wheel from the master cylinder and the nearest wheel before bleeding sequence.
Inspect before you bleed
- Check lines, hoses, calipers, and master cylinder for leaks, bulges, cracks, or seized caliper pistons. Replace defective components before bleeding.
- Inspect pads and rotors; replace pads if minimal thickness remains or if contaminated with fluid.
- Clean reservoir cap area to avoid contamination when opened.
Recommended bleeding order
Always start with the wheel farthest from the master cylinder and work to the nearest. If uncertain which wheel is farthest, use the physical distance from the brake master cylinder. Typical sequence on many Sportsman models is rear farthest, then opposite rear, then front passenger, then front driver, but confirm position visually on your machine and follow farthest-to-nearest.
Step-by-step replacement & bleeding
- Lift & secure the ATV so wheels are off the ground. Remove wheels for access if needed.
- Clean around the reservoir cap, then remove the cap and diaphragm. Use a turkey baster or syringe to remove most old fluid from the reservoir but do not run the reservoir dry. Top up with fresh DOT 4 fluid to the fill mark.
- Attach clear tubing to the bleeder nipple on the first caliper and submerge the other end in a catch jar partially filled with fresh fluid to prevent air re-entry. Use the correct sized bleeder wrench to avoid rounding the nipple.
- Have an assistant slowly pump the brake lever or pedal several times and hold pressure. With pressure applied, open the bleeder nipple about a quarter turn until fluid flows into the tubing. Close the nipple before the assistant releases the lever. Repeat until clear fluid with no bubbles flows and fluid in reservoir remains clean. Keep the reservoir topped to avoid sucking air into the system.
- Repeat for each wheel following the farthest-to-nearest order. If using a vacuum bleeder, draw fluid until clean, then tighten the nipple while still under vacuum.
- If the system contains a remote proportioning valve or secondary master cylinder, bench-bleed or follow Polaris-specific procedures for that component. If the master cylinder was opened or removed, bench-bleed the master cylinder before reinstalling to remove trapped air.
- After final wheel is bled and reservoir is filled to the proper level, tighten all bleeder nipples to spec, reinstall reservoir diaphragm and cap, and wipe any spilled fluid. Reinstall wheels and torque lug nuts to spec. Lower the ATV.
- Test brake lever & pedal firm feel at low speed in a safe area. Repeat bleeding steps if sponginess remains.
Alternative methods
- Vacuum bleeder: Good for one-person jobs. Connect to bleeder nipple and pull until clear fluid appears. Monitor reservoir level.
- Pressure bleeder: Pressurizes the master reservoir to push new fluid through the system. Use only rated equipment and follow safe pressure limits.
- Bench bleeding master cylinder: If you remove the master cylinder, bench-bleed it using supplied fittings or tubing until no air bubbles remain before reinstalling.
Tips, model notes & common pitfalls for the 2019 Sportsman Touring 570 EPS
- EPS caution: Do not hold the steering at full lock while bleeding long periods; this can change steering assist behavior and make access awkward. Straighten the wheels during bleeding when possible.
- Brake fluid type: Use DOT 4 unless the owner’s documentation for your MMY specifies otherwise. Mixing DOT 3 and DOT 4 is generally acceptable but avoid mixing DOT 5 (silicone) with DOT 3/4.
- Reservoir access: The reservoir on the Touring models may be under a panel or seat; remove panels carefully and keep the filler area clean.
- Contamination: Even small amounts of moisture or dirt cause poor braking performance. Dispose of old fluid responsibly and keep the system closed once bled.
- Caliper pistons: After bleeding, if one caliper still feels weak, check for seized pistons or collapsed hoses. Replace flexible hoses showing swelling under pressure.
- Parking brake linkage: If your model has park brake mechanisms, inspect and adjust after bleeding since pad position can shift when calipers are serviced.
Post-service checklist
- Confirm no leaks at bleeder nipples, hoses, or master cylinder.
- Ensure reservoir level is at the correct mark and cap is secure.
- Test brakes at low speed before normal riding.
- Record fluid change date and mileage for maintenance tracking.
Disposal
Collect used brake fluid and dispose of it per local hazardous-waste regulations. Do not pour fluid onto the ground or into drains.
This MotoSport procedure is written for clarity and reliability on the 2019 Polaris Sportsman Touring 570 EPS. If you encounter unusual problems such as repeated air ingress or persistent soft brake lever feel after thorough bleeding, stop and inspect components or consult a qualified technician.
Related Shopping Categories
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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.