How to Bleed and Replace Brake Fluid on a 2018 Can-Am Outlander 850 XT-P

Shop parts for a 2018 Can-Am Outlander 850 XT-P ATV.

This MotoSport guide walks you through replacing the brake fluid and properly bleeding the hydraulic system on a 2018 Can-Am Outlander 850 XT-P. Follow these instructions carefully to restore firm braking performance and protect the brake system components. This procedure assumes basic mechanical skill and a clean, well-lit workspace.

What you need

  • DOT 4 brake fluid (Can-Am specified)
  • Brake bleeder kit: clear tubing and catch bottle, vacuum or pressure bleeder recommended
  • 10-12 mm wrenches (bleeder and banjo fittings vary by caliper)
  • Clean rags and brake cleaner
  • Jack or ATV lift and stands
  • Torque wrench
  • Gloves and eye protection
  • Container for used fluid (dispose according to local regulations)

Model-specific notes for the 2018 Outlander 850 XT-P

  • Factory spec: use DOT 4 brake fluid only. Do not mix DOT 3 and DOT 5 fluids with DOT 4.
  • The XT-P typically has dual hydraulic circuits with front and rear calipers. Bleed both circuits fully.
  • If your machine has ABS or Traction Control features, the ABS pump may require a specific cycle to clear trapped air. If ABS cycling is required, a diagnostic/bleeder tool or dealer assistance may be necessary.
  • The Outlander 850 uses durable calipers and banjo fittings that accept crushed copper washers. Replace washers if disturbed.
  • Be mindful of power steering oil and electrical connectors around the front suspension when lifting and moving the machine.

Preparation

  1. Park on level ground, engage parking brake, and remove the key. For added safety, disconnect the negative battery terminal if you will be working near electrical components.
  2. Lift the machine to access wheels and calipers. Secure on proper stands; never rely on the jack alone.
  3. Clean the brake master cylinder reservoir cover area to prevent contamination. Remove the reservoir cap and diaphragm; cover the opening with a clean plastic wrap if needed to slow contamination during the job.
  4. Inspect lines, hoses, banjo bolts, and calipers for leaks or damage. Replace any deteriorated components before bleeding.

Reservoir management

Keep the master cylinder reservoir top filled with DOT 4 fluid throughout the procedure. Do not allow the reservoir to run dry at any point; air entering the master cylinder makes bleeding more difficult.

Bleeding sequence — general rule

Bleed from the caliper farthest from the master cylinder first, then progress to the nearest. On most Outlanders the typical order is:

  1. Rear caliper farthest side
  2. Rear caliper nearest side
  3. Front caliper farthest side
  4. Front caliper nearest side

If you are uncertain which port is farthest, identify the master cylinder and work from the furthest wheel toward the nearest.

Manual pump (two-person) bleeding method

  1. Attach clear tubing to the bleeder nipple and place the other end into a catch bottle partly filled with fresh brake fluid to prevent air re-entry.
  2. Have an assistant slowly pump the brake lever/pedal several times and hold it firmly down.
  3. Open the bleeder nipple about a quarter-turn. Fluid and air will flow into the tubing. Close the nipple before the assistant releases the lever/pedal.
  4. Repeat pumping, holding, opening, and closing until no air bubbles appear and the fluid runs clear.
  5. Top up the reservoir frequently to prevent it from running dry.
  6. Work through the bleed sequence for each caliper.
  7. After the final caliper, check lever/pedal feel. If soft or spongy, repeat the sequence.

Vacuum or pressure bleeder (recommended for a single operator)

  1. Hook up the vacuum pump or pressure bleeder to the reservoir per the device instructions.
  2. Set the device to draw/pressurize and open each bleeder nipple in the sequence described. Monitor fluid color and bubble-free flow.
  3. Once clear, close the bleeder and move to the next wheel. Keep reservoir topped up.

Caliper, banjo bolt & hose handling

  • If you remove banjo bolts or hoses, replace copper crush washers and torque to Can-Am specifications. If you don't have the exact torque spec on hand, snug then tighten to a firm manufacturer-level torque using a torque wrench; consult your service manual for exact values before final assembly.
  • Inspect banjo bolts and threads for damage and replace any corroded fittings.

Finishing steps

  1. Once bleeding is complete and the lever/pedal feels firm, tighten each bleeder to spec and wipe away any spilled fluid with brake cleaner. Brake fluid damages paint & plastics.
  2. Reinstall reservoir diaphragm and cap. Clean any contaminated surfaces.
  3. Lower the ATV, reinstall wheels and torque wheel fasteners to spec.
  4. Start the machine and perform low-speed brake checks in a safe area to confirm proper function before riding hard.
  5. Dispose of used fluid responsibly.

Troubleshooting & tips

  • Persistent sponginess after proper bleeding may indicate a leaking component, internal master cylinder issue, or trapped air in an ABS module — seek dealer service if ABS is involved.
  • Always use fresh DOT 4 and keep the reservoir sealed between access to prevent moisture absorption; brake fluid is hygroscopic and degrades over time.
  • Service interval recommendation: replace brake fluid at least every two years or sooner if fluid appears dark or contaminated.
  • If unsure about ABS cycling or if the vehicle has electronic brake control systems, let a MotoSport-certified technician or dealer perform the service.

Safety reminders

  • Brake fluid is corrosive to paint and plastics. Protect surfaces and clean spills immediately.
  • Wear gloves and eye protection; avoid skin contact.
  • Do not mix brake fluid types.

Proper bleeding and fluid replacement restore consistent stopping power and extend the life of calipers, master cylinders, and lines. When in doubt about ABS, torque specs, or internal master cylinder repairs, contact a qualified technician or your MotoSport service partner.

Related Shopping Categories

Shop Brake Fluid for a 2018 Can-Am Outlander 850 XT-P ATV.

Shop Brake Bleeders for a 2018 Can-Am Outlander 850 XT-P ATV.

Shop Brake Pads for a 2018 Can-Am Outlander 850 XT-P ATV.

Shop Brake Lines for a 2018 Can-Am Outlander 850 XT-P ATV.

Shop Brake Tools for a 2018 Can-Am Outlander 850 XT-P 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.