How to Bleed and Replace Brake Fluid on a 2015 Honda Rancher 420 4X4 DCT EPS (FA2)

Shop parts for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) ATV.

This MotoSport guide walks you through a complete, professional brake fluid replacement and bleed for the 2015 Honda Rancher 420 4X4 DCT EPS (FA2). Follow these steps carefully and use proper safety procedures. If you are not comfortable performing brake service, have a qualified technician do the work.

What you need

  • Honda-specified brake fluid (use DOT 3 as recommended for many Honda ATVs; check your owner's manual for confirmation)
  • Clear tubing that fits over bleed nipples
  • Catch bottle (glass or plastic) and a small amount of bleach-free water or fluid for final rinse if needed
  • Brake cleaner and rags
  • Wrench set (open or flare nut wrenches for bleed screws)
  • Flat screwdriver
  • Rubber gloves and eye protection
  • Torque wrench (for caliper bolts if removed)
  • Vacuum or pressure brake bleeder (optional, speeds the job)
  • Jack and stands or ramps to stabilize the ATV

Model-specific notes for the 2015 Rancher 420 FA2

  • The Rancher 420 FA2 has independent front calipers and a rear caliper with separate master cylinder circuits; bleed each circuit separately.
  • Electronic Power Steering (EPS) does not change hydraulic brake bleeding procedure, but be careful when moving the handlebars to avoid displacing connectors or wiring.
  • DCT (dual-clutch transmission) has no role in brake hydraulic system but avoid engaging the drivetrain during maintenance; put the ATV in Park and remove key.
  • Brake fluid is hygroscopic – moisture shortens fluid life. Replace fluid every 1-2 years or sooner if dark/contaminated.
  • Do not let brake fluid contact painted surfaces — it will damage finishes. Clean spills immediately with water and brake cleaner.

Preparation

  1. Park the ATV on a level surface, put the transmission in Park, set the parking brake, and remove the key.
  2. Stabilize the ATV with a jack and stands or ramps so wheels are off the ground and at normal ride height (helps circulate fluid and open caliper pistons).
  3. Clean the area around brake reservoirs and bleed nipples to prevent contamination.
  4. Remove reservoir caps slowly to relieve any pressure; keep caps and diaphragms clean and re-install loosely when not actively adding fluid.

Which circuit to bleed first

Bleed the circuit farthest from its master cylinder first. For the Rancher FA2 that typically means:

  • Front master cylinder circuit: bleed the right front then the left front (farthest first).
  • Rear master cylinder circuit: bleed the rear caliper (only one) last.

Bleeding methods

Use one of these methods depending on tools and helpers available.

Two-person pump-and-hold (traditional)

  1. Top off the correct reservoir with fresh DOT 3 fluid.
  2. Attach clear tubing to the bleed nipple on the farthest caliper; place the other end in a catch bottle partially filled with old fluid to prevent air re-entry.
  3. Have an assistant pump the brake lever/pedal several times and hold it firmly.
  4. Open the bleed nipple about 1/4 turn to allow fluid & air to escape; close the nipple before the assistant releases the lever/pedal. Repeat until fluid runs clear and bubble-free.
  5. Keep reservoir level topped off during the process to avoid introducing air into the system.
  6. Repeat for each caliper in the proper order, finishing each circuit by checking firm lever/pedal feel.

Vacuum or pressure bleeder (recommended for one-person speed & cleanliness)

  1. Attach vacuum/pressure bleeder to the caliper or reservoir per tool instructions.
  2. Open each bleed nipple in sequence; the tool draws fluid and air out while maintaining reservoir level.
  3. Close nipples and top the reservoir once each circuit is clear.

Full fluid replacement (flush)

  1. Drain as much old fluid from each reservoir as possible with a syringe or by suction tool.
  2. Refill with fresh DOT 3 fluid and bleed as described until the fluid exiting each bleed nipple is clear and free of air.
  3. If fluid is severely contaminated, repeat the refill-and-bleed sequence until clean output is achieved.

Finishing checks

  • Ensure all bleed nipples are tightened to spec snugness (do not over-torque; hand-tight plus a small wrench turn is standard). If you remove calipers, torque caliper bolts to Honda spec when reinstalling.
  • Top reservoirs to the proper level and reinstall diaphragms and caps securely.
  • Clean any remaining fluid from painted surfaces, rotors, pads, and the work area with brake cleaner; replace contaminated pads or rotors if fluid soaked.
  • With the ATV supported and wheels off the ground, spin each wheel and apply brakes to set pads and check for binding.
  • Test ride at low speed to confirm firm brake feel and proper stopping; recheck fluid level and for leaks after initial ride.

Troubleshooting

  • Spongy lever/pedal after bleeding: recheck for air, ensure reservoir level remained full, and repeat bleeding beginning at farthest caliper.
  • Persistent leaks: inspect hose fittings, banjo bolts, seals, and bleed nipples; replace damaged components before riding.
  • Soft pedal that gets worse: do not ride — system may have internal failure or contaminated master cylinder; have it inspected.

Disposal & maintenance intervals

  • Dispose of used brake fluid per local hazardous-waste regulations.
  • Replace brake fluid every 1-2 years or sooner if it darkens or absorbs moisture.

Follow these steps and the model-specific notes to keep your 2015 Honda Rancher 420 FA2 braking system safe and responsive. If you need parts or replacement components, visit the MotoSport parts page linked above for OEM & quality aftermarket options.

Related Shopping Categories

Shop Brake Fluid for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) ATV.

Shop Brake Bleeders for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) ATV.

Shop Brake Pads for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) ATV.

Shop Brake Lines for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) ATV.

Shop Brake Tools for a 2015 Honda Rancher 420 4X4 DCT EPS (FA2) 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.