How to bleed and replace brake fluid on a 2011 Honda Rancher 420 4X4 ES POWER STEERING (FA2)
Shop parts for a 2011 Honda TRX420R4EP ATV.
This MotoSport guide gives a stepbystep, modelspecific procedure for flushing and bleeding the hydraulic brake system on the 2011 Honda Rancher 420 4X4 ES Power Steering (FA2). Follow these steps carefully to maintain safe stopping performance and avoid contamination of the system.
Notes specific to the 2011 Honda Rancher 420 FA2
- This model uses a sealed hydraulic brake system with a single master cylinder/reservoir feeding the front calipers and rear brake circuit. Confirm DOT type in your owner's manual before purchasing fluid; the system is compatible with DOT 3 or DOT 4. If unsure, replace likeforlike or use DOT 4 for slightly higher boiling point.
- The Rancher 420 has twin front calipers and a rear drum/disc depending on configuration; the same bleed principles apply. There is no ABS on this model, so bleeding is a straightforward opensystem process.
- Power steering oil reservoir is separate. Avoid mixing fluids and keep brake fluid away from painted surfaces, plastic, and rubberbrake fluid will damage paint and some plastics.
- Inspect hoses, lines, banjo bolts and caliper boots for age cracks or leaks while you work. Replace any suspect hardware to avoid rework shortly after bleeding.
Tools & supplies
- Correct DOT brake fluid (DOT 3 or DOT 4 as specified)
- Clear vinyl tubing to fit bleed nipples
- Brake bleeder bottle or clear catch bottle
- Wrenches for bleed nipples and banjo bolts (commonly 10 mm or 8 mm; confirm on bike)
- Turkey baster or fluid transfer syringe
- Clean rags, gloves and safety glasses
- Jack/stands or ramps to lift wheels (if needed)
- Optional: vacuum or pressure bleeder for speed and oneperson operation
Preparation
- Park on level ground, set parking brake, and kill the engine. Remove key.
- Clean the master cylinder reservoir cap and surrounding area to keep contaminants out.
- Remove reservoir cap and diaphragm; use a turkey baster to remove old fluid until the reservoir is low but some fluid remains to avoid introducing air from the master cylinder bore.
- Top up with fresh DOT brake fluid to the max line. Do not reuse old fluid.
- Position catch bottles and attach clear tubing to each bleed nipple so you can see bubbles leaving the system.
Bleeding order and method
Bleed the system from the wheel farthest from the master cylinder to the nearest. For most Rancher 420 layouts this typically is: right rear (if applicable) – left rear – right front – left front. If unsure which is farthest, follow the longest hydraulic line first.
Manual twoperson method
- Have an assistant pump the brake lever/pedal gently several times and hold firm. Alternatively, hold lever/pedal down and keep it depressed while bleeding each caliper.
- Open the bleed nipple about a quarter turn. Fluid and air will flow into the tubing and bottle. Close nipple before your assistant releases the lever/pedal. Repeat until clear, bubblefree fluid runs through the tube.
- Keep reservoir topped between cycles. Never let the reservoir run dry or you will have to rebleed the entire system.
- Proceed to the next wheel in the sequence. After final wheel, pump the lever/pedal to confirm firm, consistent pressure. If spongy, repeat bleeding sequence.
Singleperson vacuum or pressure bleeder method
- Attach vacuum pump to the bleed nipple or attach pressure bleeder to the master cylinder reservoir per tool instructions.
- Open the first bleed nipple and draw fluid until clear, bubblefree fluid appears. Close the nipple, then move to the next wheel.
- Maintain reservoir level during the process and finish with a firm lever/pedal test.
Master cylinder bench bleeding (recommended if you replace the reservoir or master)
- If you remove the master cylinder, benchbleed it before installation using a benchbleeding kit or by filling the reservoir and cycling fluid through small loops of tubing back into the reservoir until no bubbles appear.
- Install and then perform system bleeding as above to clear any air introduced during installation.
Inspection & torque
- After bleeding and confirming firm pedal/lever feel, torque any banjo bolts and caliper hardware to factory specs. If factory specs are not available, tighten banjo bolts evenly and securely — do not overtorque aluminum fittings.
- Wipe away any spilled brake fluid and replace reservoir diaphragm and cap. Confirm no leaks at fittings and bleed nipples.
Final checks
- With the ATV on level ground, apply the brake hard several times while moving at walking speed to bed fluid into pads. Listen for unusual noises and check for pedal/lever creep.
- Reinspect for leaks after a short test ride and recheck fluid level when cold.
- Dispose of old brake fluid properly; it is hazardous waste.
Troubleshooting
- Persistent spongy lever/ pedal: rebleed, check for soft/swollen hoses, or internal master cylinder seal failure.
- Visible leaks at fittings: tighten, replace crush washers or banjo bolts as needed.
- Brake drag after bleeding: ensure caliper pistons are free and slide pins move smoothly; check parking brake/drum adjustment on rear units.
Model care tips from MotoSport
- Regularly inspect brake hoses on the Rancher 420 for UV/weather cracking; these ATVs often see harsh use and hoses age faster than on road vehicles.
- If you plan to run in wet, muddy conditions, consider bleeding and inspecting brakes more frequently and using a DOT 4 fluid with a higher boiling point for heavy use.
- Keep a small spare seal kit and crush washers in your tool kit for field repairs — the Rancher is easy to service but vulnerable to stripped or leaking banjo fittings if not handled carefully.
Performing a complete brake fluid flush and proper bleed restores pedal/lever firmness and extends component life. If you prefer a faster singleperson job, use a quality pressure or vacuum bleeder available through MotoSport's parts selection.
Related Shopping Categories
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Shop Brake Lines for a 2011 Honda TRX420R4EP ATV.
Shop Brake Tools for a 2011 Honda TRX420R4EP 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.