How to Bleed and Replace Brake Fluid on a 2018 Can-Am Renegade 850 X XC

Shop parts for a 2018 CAN-AM REN850XXC ATV.

This proprietary MotoSport guide walks through a safe, complete brake fluid change and bleed for the 2018 Can-Am Renegade 850 X XC. Follow every step carefully — incorrect bleeding or the wrong fluid can cause reduced braking performance or damage. This procedure assumes basic mechanical ability and standard tools; if you are unsure, stop and consult a professional technician.

Important model notes for the 2018 Renegade 850 X XC

  • The factory recommends DOT 4 brake fluid. Use fresh, sealed DOT 4 only; never mix DOT 5 silicone fluid with DOT 4.
  • Some Renegade 850 X XC units may be fitted with electronic brake modulation or ABS hardware. If your machine has ABS, follow ABS-specific cycling and scanning procedures. Do not attempt to cycle ABS actuators without proper diagnostic equipment.
  • Brake reservoirs on this model are compact. Keep the cap clean & avoid contamination when topping off or refilling.
  • Brake line routing is exposed to mud and debris on the Renegade; inspect lines and fittings for wear or chafing while you work.

Tools & supplies

  • DOT 4 brake fluid (new, sealed bottle)
  • Brake bleeder kit (vacuum pump, hand pump, or pressure bleeder)
  • Clear plastic tubing to fit bleed nipples
  • Catch bottle and some rags
  • Torque wrench or properly sized sockets/wrenches for caliper bleed nipples and reservoir cap
  • Jack or ramps and wheel chocks to safely lift and stabilize the ATV (if removing wheels)
  • Safety glasses and nitrile gloves

Preparation

  1. Work on a level surface with the engine off, key removed. Chock the machine so it cannot roll.
  2. Clean the master cylinder reservoir cap and surrounding area to prevent contamination. Remove the cap and diaphragm carefully and set aside on a clean surface.
  3. Inspect master cylinder reservoir for debris, leaks, and fluid condition. If extremely dirty or discolored, consider flushing the entire system as described below.
  4. Keep the reservoir topped with new DOT 4 during the entire bleed process to avoid air ingestion.

Overview of the bleed order

Bleed starting at the caliper farthest from the master cylinder and move to the closest. Typical sequence for Renegade 850 X XC:

  1. Rear caliper(s) first (if dual rear calipers, farthest first)
  2. Front calipers (farthest to closest)
  3. Finish at master cylinder area and verify pedal feel

Step-by-step bleeding procedure (manual or vacuum pump method)

  1. Attach clear tubing to the bleed nipple on the caliper and route into a catch bottle partially filled with a little DOT 4 to keep air from being drawn back into the system.
  2. Have a helper slowly pump the brake lever/pedal several times and hold it down. Open the bleed nipple slightly to let fluid and air escape. Close the nipple before the helper releases the lever. Repeat until clear fluid with no bubbles flows, then tighten the nipple to spec and move to the next caliper.
  3. If using a vacuum bleeder, connect the bleeder to the master cylinder reservoir per the tool instructions, then open each caliper bleed screw in the same far-to-near sequence. Monitor the reservoir level and keep it topped with fresh DOT 4 to prevent air draw-in.
  4. Do not allow the reservoir to run low. Refill as needed during the process.
  5. After each caliper is bled, wipe the area clean and torque bleed screws to the manufacturer spec. If you do not have a torque spec, tighten snugly but do not over-torque.
  6. Once all calipers are bled, pump the brake pedal/lever to check firmness. If the pedal is spongy, repeat bleeding passes until solid. Make a minimum of two full system passes to ensure complete fluid replacement.

Flushing and replacing all fluid

  1. To fully replace old fluid, use a pressure bleeder on the master reservoir or perform repeated manual vacuum/manual bleeds until new fluid runs through each caliper. Expect to use more than one bottle of DOT 4 for a complete flush.
  2. Monitor the color of expelled fluid. When it runs clear and matches new fluid color, the system is flushed.
  3. Top the reservoir to the proper level, re-install the diaphragm and cap, and clean any spilled fluid immediately. DOT 4 will damage paint and plastics.

ABS or brake modulation systems

If the Renegade is equipped with ABS/modulation, do not cycle ABS solenoids by rapid pumping unless you have the factory procedure or a diagnostic scan tool. If you suspect air trapped in the ABS module, specialized bleed procedures or a shop visit with the proper scanner may be required.

Post-bleed checks

  • Verify pedal/lever firmness at operating temperature after a short test ride at low speed.
  • Check for leaks at calipers, hoses, banjo fittings and reservoir.
  • Inspect brake pads and rotors while you have wheels off; replace if worn or contaminated with fluid.
  • Properly dispose of old brake fluid per local regulations.

Common issues & troubleshooting

  • Persistent spongy feel: watch for hidden air in ABS modules, collapsed flexible hoses, or internal master cylinder leaks.
  • Brake drag after bleeding: check caliper slider pins, piston return, and correct re-tightening of bleed valves.
  • Contaminated pads or rotors: replace pads and clean or replace rotors if fluid contacted friction surfaces.

Torque & safety reminders

  • Tighten bleed nipples and banjo bolts to manufacturer specs when known; otherwise, use moderate, controlled torque to avoid stripping.
  • Never mix DOT 4 with DOT 5 silicone fluid. If switching fluid types, complete a full system flush and replace hoses if contamination is suspected.
  • Brake fluid is hygroscopic; record the service date and plan to change fluid every 1-2 years depending on use and exposure to water.

Follow these MotoSport procedures for a reliable brake fluid replacement and bleed on your 2018 Can-Am Renegade 850 X XC. If you encounter unusual brake behavior, ABS warnings, or cannot achieve firm pedal feel, stop and seek professional service to maintain safety.

Related Shopping Categories

Shop Brake Fluid for a 2018 CAN-AM REN850XXC ATV.

Shop Brake Bleeders for a 2018 CAN-AM REN850XXC ATV.

Shop Brake Pads for a 2018 CAN-AM REN850XXC ATV.

Shop Brake Lines for a 2018 CAN-AM REN850XXC ATV.

Shop Brake Tools for a 2018 CAN-AM REN850XXC 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.