How to bleed & replace brake fluid on a 2009 Suzuki King Quad 750AXi 4X4 POWER STEERING
Shop parts for a 2009 Suzuki King Quad 750AXi 4X4 POWER STEERING ATV.
Overview
This guide from MotoSport walks you through safely flushing and bleeding the brake system on a 2009 Suzuki King Quad 750AXi 4X4 with power steering. It covers prep, tools, step-by-step flushing & bleeding, checks to confirm a complete job, and model-specific notes owners should know. Use the factory service manual for torque specs and any manufacturer-specific procedures.
What you need
- Brake fluid: DOT 4 is recommended unless your owner's manual specifies otherwise (never mix brake & steering hydraulic fluid).
- Clear plastic tubing sized to fit bleed nipples.
- Catch bottle or reservoir for old fluid.
- Hand or vacuum brake bleeder (vacuum pump or pressure bleeder speeds job and reduces air ingress).
- Wrenches for bleed nipples (usually 8mm or 10mm) and line fittings.
- Large flat screwdriver or small funnel for reservoir cap; clean rags, brake parts cleaner, rubber gloves, eye protection.
- Floor jack and stands or ramps to raise the ATV so wheels can rotate freely.
- Compressed air or a helper for pedal/lever actuation if not using a vacuum/pressure bleeder.
- Service manual for torque specs and any ABS-specific procedures.
Safety & prep
- Work on a level surface with engine off and key removed.
- Wear eye protection & gloves. Brake fluid damages paint & plasticwipe spills immediately.
- Keep the reservoir cap closed except when adding fluid to limit contamination and moisture absorption.
- Parking brake off and shift into neutral if required for wheel rotation.
Model-specific notes for the 2009 King Quad 750AXi PS
- The hydraulic power steering reservoir is separate from the brake master cylinder reservoir. Do not use power steering fluid in the brake system and avoid cross-contamination when working near both components.
- This model typically uses a front master cylinder and rear master cylinder (or proportioning) arrangement depending on configuration; inspect your machine to identify the master cylinder feeding each caliper.
- There is no factory ABS on most 2009 King Quad 750AXi ATVs, so bleeding is a conventional hydraulic bleed. If your unit has aftermarket ABS or modulations, follow the ABS bleeder routine in the manual or have a dealer service it.
- Brake line routing on this model runs close to engine and chassis areas; inspect hoses for chafing, cracks, or soft spots while the system is depressurized. Replace any suspect hoses before bleeding.
Procedure – full fluid replacement and bleed
- Raise the ATV so wheels can turn freely and remove wheels if needed for easy access to bleed nipples.
- Clean the area around the master cylinder reservoir cap. Remove cap & diaphragm; cover the opening with clean shop towel to prevent dirt ingress.
- Siphon or pump out as much old fluid from the reservoir as possible. Dispose of fluid properly.)
- Refill the reservoir with fresh DOT 4 brake fluid to the full mark. Keep the reservoir top covered but accessible.
- Identify bleeding order: start at the caliper farthest from the master cylinder and work toward the closest. Typical order for a 4X4 ATV is: rear opposite side farthest from master, then other rear, then front farthest, then final front. If unsure, identify which caliper is farthest by the length of hose routing.
- Attach clear tubing to the bleed nipple and submerge the other end in a small volume of clean brake fluid in a catch bottle to prevent air re-entry into the system.
- If using a helper: have helper hold brake pedal lightly depressed. Open the bleed nipple about a 1/4 turn. Instruct helper to press brake pedal slowly to the floor until fluid runs clear without air bubbles, then hold pedal down. Tighten the nipple and tell helper to release pedal. Repeat until no bubbles appear and fluid coming from that caliper is clean and the reservoir level stays steady at the full mark.
- If using a vacuum bleeder: attach vacuum hose to the bleed nipple and apply vacuum while slowly adding fresh fluid to the master cylinder reservoir so it never runs low. Open the nipple and let fluid be drawn until clear and bubble-free, then tighten nipple before releasing vacuum.
- Repeat the procedure for each caliper in the chosen sequence. Keep the reservoir level topped up to avoid drawing air into the system.
- After the last caliper, cycle the brake lever/pedal several times to confirm firm feel. Recheck each bleed nipple for leaks and tighten to factory torque (refer to manual).
- Lower the ATV, reinstall wheels if removed, torque wheel nuts to spec, and road-test at low speed to confirm firm pressure and normal stopping. Check reservoir level after test & top as needed.
If brakes remain spongy
- Repeat bleeding sequence; a spongy pedal almost always indicates remaining air in the system.
- Check for soft brake hoses that swell under pressure — these can trap air and require hose replacement.
- Inspect caliper pistons for seizure or leak. Rebuild or replace calipers if required.
- If the master cylinder internal seal is failing, it may not build pressure — bench-test or replace the master cylinder.
Power steering & brake interaction note
The King Quad 750AXi power steering uses a separate hydraulic circuit. Do not bleed or top the brake system with any steering fluid. If you suspect power steering contamination in brake lines, stop work and have the system inspected; contamination requires flushing and replacement of affected components.
Maintenance tips
- Replace brake fluid every 1-2 years or sooner if contaminated. Brake fluid absorbs moisture over time, which reduces boiling point and causes corrosion.
- Always use fresh, unopened brake fluid and keep the reservoir cap closed immediately after topping.
- Inspect hoses, fittings, and caliper seals whenever you service fluid. Replace any component showing wear or leakage.
- Record the service date and mileage/hours so you keep a timely fluid change interval.
Disposal
Used brake fluid is hazardous waste. Collect it in a sealed container and dispose of it at an approved recycling or hazardous-waste facility.
Related Shopping Categories
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Shop Brake Tools for a 2009 Suzuki King Quad 750AXi 4X4 POWER STEERING 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.