How to Bleed and Replace Brake Fluid on a 2018 Can-Am Outlander MAX 450
Shop parts for a 2018 Can-Am Outlander MAX 450 ATV.
This MotoSport-exclusive guide walks you through safely flushing and bleeding the brake system on a 2018 Can-Am Outlander MAX 450 (MMY OLM450). Follow these steps to restore firm pedal feel, remove moisture and contaminants from the system, and keep your ATV stopping reliably.
Safety first
- Work on a level surface with the engine off, key removed, and parking brake engaged.
- Wear safety glasses and nitrile gloves. Brake fluid is corrosive to paint & plastics.
- Keep a catch container and rags ready. Dispose of old fluid per local regulations.
What you need
- DOT 4 brake fluid (factory recommendation for most Can-Am models – verify your owner's manual)
- Clear plastic tubing to fit bleed nipples
- Catch bottle marked for used brake fluid
- Wrenches to open bleed nipples (typically 8 mm or 10 mm)
- Turkey baster or fluid transfer pump
- Assistant to operate the brake lever/pedal
- Brake cleaner, shop towels, and gloves
Model-specific notes for the 2018 Outlander MAX 450
- The Outlander MAX 450 uses a hydraulic brake circuit with separate front calipers and a rear caliper. Some models include a secondary parking brake mechanism on the rear — inspect linkage for corrosion or binding before bleeding.
- Reservoirs are accessible under the front rack area and near the rear brake master cylinder; clean the surrounding area before opening to avoid contamination.
- If your machine has dual master cylinders (front/rear separated), bleed each independently following the factory sequence: typically rear, right front, left front, but confirm by checking your master cylinder labels or service manual. When in doubt, bleed the furthest caliper from the master cylinder first.
- Electronic brake-assist or ABS is not standard on most 2018 Outlander 450 models — there is no ABS pump to cycle. If your unit has a factory ABS option, consult MotoSport service specialists before proceeding.
Preparation
- Clean the top of each reservoir and remove the cap. Use a clean rag to avoid introducing dirt.
- Use a turkey baster or transfer pump to remove old fluid from the reservoirs until level is low but not dry. Refill with fresh DOT 4 to the recommended level.
- Locate bleed nipples on each caliper. Fit clear tubing over the nipple and route it into your catch bottle partially filled with fresh fluid or a small amount of used fluid to prevent air being drawn back in.
Bleeding procedure (basic two-person method)
- Start with the caliper farthest from the master cylinder. If front and rear masters are separate, follow the master-specific sequence: most remote caliper first.
- Have your assistant apply steady pressure to the brake lever or pedal and hold it down.
- Open the bleed nipple about a quarter to a half turn. Fluid and bubbles will flow into the tubing and bottle. Close the nipple before your assistant releases the lever/pedal. Repeat until no air bubbles appear and fluid runs clear.
- Top up the master cylinder reservoir between cycles to avoid drawing air into the system.
- Proceed to the next caliper in sequence until all calipers are bled and the fluid is clear and bubble-free.
- With all calipers bled, squeeze the lever/pedal multiple times to confirm a firm, consistent feel. If sponginess remains, repeat the bleeding sequence.
Single-person vacuum or pressure bleeding (alternate method)
Use a hand-held vacuum bleeder on each bleed nipple or a pressure bleeder on the reservoir to perform a one-person bleed. Follow tool manufacturer instructions. When using a pressure bleeder, maintain recommended reservoir pressure and never over-pressurize the system.
Finishing steps
- Wipe any spilled fluid immediately. Inspect brake lines, hoses, and calipers for leaks. Tighten bleed nipples to spec by hand then a small additional fraction of a turn with a wrench — do not overtighten.
- Top off the reservoirs to the recommended level and reinstall caps securely.
- Discard used brake fluid responsibly. Clean tools and work area.
- Test ride at low speed in a safe area to confirm braking performance before returning to regular use.
Troubleshooting
- Persistent sponginess: check for leaks, damaged hoses, or a contaminated master cylinder. Repeat bleeding and inspect components.
- Brake drag after bleeding: ensure caliper pistons returned fully and parking brake linkage is free.
- If you suspect internal master cylinder failure or soft lever feel despite correct bleeding, replace the master cylinder.
Maintenance tips
- Change brake fluid every 1-2 years or sooner if the fluid darkens. Moisture in DOT fluids reduces boiling point and accelerates corrosion.
- Inspect brake pads, rotors, lines, and fittings while servicing fluid. Replace worn pads or damaged components promptly.
- Keep a small bottle of DOT 4 on hand for top-offs during extended rides & remote trips.
Follow this MotoSport proprietary procedure to keep your 2018 Can-Am Outlander MAX 450 braking system performing safely and reliably. For parts and service tools specific to your MMY OLM450, use the parts link above.
Related Shopping Categories
Shop Brake Fluid for a 2018 Can-Am Outlander MAX 450 ATV.
Shop Brake Bleeders for a 2018 Can-Am Outlander MAX 450 ATV.
Shop Brake Pads for a 2018 Can-Am Outlander MAX 450 ATV.
Shop Brake Lines for a 2018 Can-Am Outlander MAX 450 ATV.
Shop Brake Tools for a 2018 Can-Am Outlander MAX 450 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.