How to Bleed and Replace Brake Fluid on a 2014 Polaris Scrambler XP 850 H.O. EPS

Shop parts for a 2014 Polaris SCRAMX85HE ATV.

This MotoSport guide walks you through a complete, safe brake fluid replacement and bleed on the 2014 Polaris Scrambler XP 850 H.O. EPS (MMY: Polaris;SCRAMX85HE;2014). Follow each step carefully, use proper PPE, and dispose of used fluid responsibly.

What you need

  • DOT 4 brake fluid (clean, unopened bottle)
  • Clear tubing long enough to reach a catch container
  • Catch container and clean rags
  • Brake bleeder wrench or correct-size open-end wrench for bleeder nipples
  • Hand vacuum pump or pressure bleeder (optional but speeds the job)
  • Socket set and hex/Allen keys to remove wheel/guard as needed
  • Plastic syringes or turkey baster for reservoir fluid removal
  • Torque wrench (for reassembly to proper fastener torque)
  • Gloves, eye protection

Safety and prep

  • Work on a level surface with the engine off and key removed. For EPS models leave steering straight and support the ATV on stands if wheels are removed.
  • Never reuse brake fluid once removed. Brake fluid is hygroscopic — moisture shortens service life and reduces performance.
  • Keep brake fluid away from painted surfaces; it damages paint. Wipe spills immediately with clean water.
  • Park brake engaged and block wheels if the machine is supported on a lift or stands.

Overview of the system on this model

The 2014 Scrambler XP 850 H.O. EPS uses hydraulic disc brakes with separate front calipers and a rear caliper. There is a single master cylinder reservoir (front/rear combined or separate depending on model year setup) located under the front rack area. EPS denotes electric power steering — bleeding brakes does not require any special EPS procedures, but keep steering centered during the service. This model does not use ABS; bleeding is straightforward hydraulic bleeding.

Step 1 – Access and inspect

  • Remove any panels or the front rack to access the master cylinder reservoir. Clean the area around the cap before opening to avoid contamination.
  • Inspect hoses, lines, banjo bolts and calipers for leaks or damage. If components are corroded or leaking, replace them before bleeding.

Step 2 – Remove old fluid from reservoir

  • With the cap off, use a clean syringe or turkey baster to remove as much old fluid from the reservoir as possible. Do not leave the reservoir empty long; keep it partially filled during the procedure to avoid introducing air into the system.
  • Top up with fresh DOT 4 fluid from an unopened bottle. Keep the cap or a clean rag over the filler to minimize contamination while working.

Step 3 – Bleeding order

  • Standard bleed order: farthest caliper from the master cylinder first, then move to the nearest. On most Scrambler XP 850 layouts that means: rear caliper first, then right front, then left front. Confirm which ports are furthest from the master cylinder visually and follow that sequence.

Step 4 – Manual (two-person) bleed method

  • Attach clear tubing to the bleeder nipple and submerge the other end in a small container partially filled with fresh fluid to prevent air re-entry.
  • Have an assistant pump the brake lever/pedal several times and hold pressure.
  • Open the bleeder about 1/4 turn until fluid runs out through the tube; close the bleeder and tell the assistant to release the lever. Repeat until fluid runs clear with no air bubbles.
  • Top up the reservoir frequently so it never runs low.

Step 5 – Vacuum or pressure bleeder method (preferred for one-person)

  • Attach a hand vacuum pump to the bleeder nipple or use a pressure bleeder on the master cylinder reservoir per the tool manufacturer instructions.
  • Operate the tool to draw fluid until clear, maintaining reservoir level and repeating for each caliper in the correct order.
  • Vacuum bleeds are cleaner and reduce the chance of introducing air.

Step 6 – Final reservoir fill & checks

  • Fill the reservoir to the correct level line with DOT 4 fluid and secure the cap.
  • Operate the brake lever/pedal to verify a firm, consistent feel. If the lever is spongy, repeat bleeding until firm.
  • Inspect bleeder nipples and line fittings for leaks. Torque banjo bolts and fasteners to Polaris recommended specs if you have them; if not, tighten securely then check for leaks after a short test ride and re-torque as required.

Post-bleed checks and break-in

  • Carefully clean any fluid spills and recheck reservoir level after initial ride; top up if required.
  • Bed the brakes gently over a short ride to ensure optimum pad-to-rotor contact.
  • Dispose of used fluid according to local hazardous waste rules.

Model-specific notes for the 2014 Scrambler XP 850 H.O. EPS

  • Electric Power Steering (EPS): EPS does not affect the brake system bleed directly, but perform brake checks with the steering centered and the vehicle on a stable surface.
  • Reservoir access: On some Scrambler XP 850 configurations the master cylinder reservoir is under the front rack or an access cover – remove racks/panels carefully to avoid breaking fasteners.
  • Caliper style: Front and rear use conventional piston calipers with external bleeder nipples. Make sure bleeder nipples turn freely before starting; replace damaged nipples to avoid air ingress.
  • Recommended fluid: DOT 4 is preferred for this application because of higher boiling point compared to DOT 3. Do not mix DOT 5 (silicone) with DOT 4.
  • Brake line age: If hoses are original and show soft spots, cracking or swelling during bleeding, replace them. Older braided or OEM rubber lines can hide internal deterioration that causes spongy brakes.
  • Torque and fasteners: Use correct Polaris torque values for caliper mounting and banjo bolt hardware when reinstalling — improper torque can leak or damage sealing washers.

Troubleshooting

  • Persistent spongy lever after repeated bleeding: inspect for collapsed hoses, internal master cylinder issues, or trapped air in hard-to-reach sections. Consider replacing old rubber hoses and inspect the master cylinder.
  • Brake fade after heavy use: verify fluid contamination or boiling — if fluid looks dark or cloudy, replace and re-bleed. Consider DOT 4 with higher boiling point if you do heavy towing or aggressive riding.

Perform a low-speed functional test in a safe area before full use. If you're unsure about any step or discover damaged components, contact a professional technician.

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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.