How to Bleed & Replace Brake Fluid on a 2018 Textron Alterra TBX 700

Shop parts for a 2018 Textron Alterra TBX 700 ATV.

This step-by-step MotoSport service guide walks you through flushing and bleeding the brake system on a 2018 Textron Alterra TBX 700. Follow safety precautions, use the correct fluid, and work methodically to restore firm, reliable brakes.

What you need

  • Correct brake fluid (check your owner's manual for DOT spec; if unsure, confirm before starting)
  • Clear tubing to fit bleed nipples
  • Catch bottle for old fluid
  • Brake bleeder wrench or appropriately sized box/open wrench
  • Syringe or turkey-baster (for removing old fluid from reservoirs)
  • Clean rags and brake cleaner
  • Disposable gloves and eye protection
  • Jack or stands to stabilize the ATV (wheel off optional but helpful)
  • Assistant to operate brake lever/pedal or a one-man vacuum/pressure bleeder

Model notes for the 2018 Textron Alterra TBX 700

  • The Alterra TBX 700 uses conventional hydraulic calipers front & rear with bleed nipples accessible on each caliper. Front master cylinder is on the right handlebar; rear master cylinder and reservoir are mounted near the frame and rear brake pedal area. Confirm exact locations visually on your machine before beginning.
  • The system is not equipped with complex electronic ABS controls on most TBX 700 trims, which simplifies bleeding. If your machine has any factory-fitted brake sensors or optional electronics, take care not to contaminate or disturb wiring/connectors.
  • Brake fluid is hygroscopic – it absorbs moisture. Replace fluid at manufacturer-recommended intervals and after any prolonged storage or water exposure. Use only the DOT rating specified for your machine.
  • Caliper bleed nipples can rust or round off if unevenly torqued. Use a proper wrench and avoid excessive force; replace corroded nipples before bleeding if necessary.

Preparation

  • Work on a level surface with parking brake off and engine off. Stabilize ATV on a stand or jack where needed.
  • Clean around reservoirs, caps & bleed nipples with brake cleaner to prevent contamination.
  • Remove reservoir caps; if reservoirs have diaphragms, leave them in place unless replacing fluid completely. Keep caps loosely seated to prevent dirt entry while keeping the system closed to air as much as possible.
  • Protect painted surfaces from spilled fluid; brake fluid can damage plastic & paint.

Complete fluid replacement & bleeding procedure

  1. Identify sequence: start with the caliper farthest from its master cylinder (typically rear caliper if front & rear share a line, otherwise start with passenger-side/front-right if applicable). For the TBX 700, a common sequence is: rear caliper, right front caliper, left front caliper. Confirm routing visually and adjust if your machine differs.
  2. Top off the master reservoir with fresh, correct-spec fluid but do not overfill. Keep the cap off or loose while bleeding to allow air to escape.
  3. Attach clear tubing to the caliper bleed nipple and route into a catch bottle partially filled with a small amount of fresh fluid (prevents air from being drawn back in).
  4. Have an assistant slowly depress the brake lever or pedal and hold it down. Open the bleed nipple about a quarter- to half-turn to allow fluid and bubbles to flow into the tubing. Close the nipple before the assistant releases the lever to prevent air re-entry. Repeat until clear, bubble-free fluid flows and no air appears.
  5. Keep the master reservoir level topped up during the process. Never allow it to run dry or air will be drawn into the system, requiring repeated bleeding.
  6. Work through the remaining calipers in the chosen sequence. For front brakes, use the lever for the front master; for rear, use the pedal. If the TBX 700 uses a combined or linked system, operate both controls as directed by your manual while maintaining the sequence.
  7. After each caliper is bled, torque bleed nipple to specification if available and wipe away fluid. Reinstall and seat reservoir cap. Pump brakes to confirm firmness before riding.

One-person vacuum/pressure bleeder method

  • Use a vacuum bleeder on each caliper or a pressure bleeder on the master reservoir to automate the process. Follow the bleeder tool instructions and maintain reservoir level. This method reduces the chance of introducing air and is cleaner for solo work.

Finishing checks

  • Verify pedal/lever feel: should be firm with minimal travel. If spongey, repeat bleeding until all air is removed.
  • Inspect for leaks around hoses, calipers, and bleed nipples under pressure. Tighten or replace leaking components.
  • Properly dispose of old brake fluid; it is hazardous waste.
  • Test ride at low speed in a safe area to confirm braking performance before normal use.

Troubleshooting & common issues

  • Persistent sponginess: likely trapped air or contaminated hoses/master cylinder. Repeat bleeding, inspect hoses for swelling, and consider replacing old rubber lines or the master cylinder if internal seals are leaking.
  • Stiff lever with poor stopping power: check caliper pistons for seizure or pads glazed on rotors. Clean/replace components as needed.
  • Rounded bleed nipples: use proper wrenches and penetrating fluid; if seized, cut and replace the nipple to avoid stripping.

Maintenance tips specific to the Alterra TBX 700 owner

  • Keep brake fluid replacement intervals regular; the TBX 700 sees varied use from trail riding to heavy work, so inspect fluid more often if used in wet or muddy conditions.
  • After riding through water or deep mud, check brake function and dry the system by gentle, repeated braking at low speed to help evaporate moisture from pads & rotors.
  • Stock caliper hardware is robust but inspect for corrosion after winter storage; replace seized slide pins or hardware to maintain even pad wear.
  • Carry a small bleed kit or a spare master cylinder cap with a sealed bottle of fluid for field emergencies; this model's reservoirs are accessible but keep fluid sealed to prevent contamination.

Performing a careful fluid change and bleed restores brake performance and extends component life. If you encounter persistent problems beyond bleeding — such as internal master cylinder failure or caliper seizure — seek professional service.

Related Shopping Categories

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Shop Brake Lines for a 2018 Textron Alterra TBX 700 ATV.

Shop Brake Tools for a 2018 Textron Alterra TBX 700 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.