AUTOOL AST603 Pulsating Brake Fluid Bleeder
Original price was: US$399.00.US$209.00Current price is: US$209.00.
- One-Person Pulsating Exchange
- 0.5–2.5 Bar Range
- Low-Fluid Auto Stop
- No-Pressure/Air Auto Stop
- One-Person Pulsating Exchange: Deliver fresh brake fluid with pulsating pressure while releasing used fluid at the selected caliper.
- 0.5–2.5 Bar Range: Adjust working pressure from 0.5 to 2.5 bar to suit the vehicle’s service procedure.
- Low-Fluid Auto Stop: Stop the machine automatically when the new-fluid container runs empty.
- No-Pressure/Air Auto Stop: Shut down if pressure cannot build or the pump draws in air.
- Reservoir Adapter Connection: Connect to compatible brake-fluid reservoirs with the matching sealed adapter.
- One-Person Pulsating Exchange: Deliver fresh brake fluid with pulsating pressure while releasing used fluid at the selected caliper.
- 0.5–2.5 Bar Range: Adjust working pressure from 0.5 to 2.5 bar to suit the vehicle’s service procedure.
- Low-Fluid Auto Stop: Stop the machine automatically when the new-fluid container runs empty.
- No-Pressure/Air Auto Stop: Shut down if pressure cannot build or the pump draws in air.
- Reservoir Adapter Connection: Connect to compatible brake-fluid reservoirs with the matching sealed adapter.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL AST603 · Pulsating Brake Fluid Bleeder
Run One-Person Pulsating Brake Fluid Service
AUTOOL AST603 is a pulsating brake fluid bleeder for one-person service while used fluid drains at the selected caliper. AST603 connects through a sealed reservoir adapter and protects the service by stopping when fresh fluid runs out or pressure cannot build. The recovery path keeps removed fluid contained during the prescribed wheel sequence.
- One-Person Pulsating Exchange
- 0.5–2.5 bar Working Range
- 1.6 L/min Listed Flow
- Low-Fluid Stop Protection
- Reservoir-Specific Adapter Fit
Key Features
Pulsating Brake Fluid Exchanger with Low-Fluid Protection
One-Button Pulsating Exchange
After preparing the bottle, hoses, reservoir connection, and operating conditions, one person can use the one-button start for the automatic pulsating exchange. The machine’s two sub-pumps work at the same time as it delivers fresh fluid to the reservoir at the specified pressure and releases used fluid at each selected caliper in the prescribed sequence until new fluid flows out.
Intelligent Liquid-Level Monitoring
If the new-fluid container runs out during filling, the built-in monitor stops the machine to help prevent air from entering the brake pipelines.
Corrosion-Resistant Hoses
Flexible oil hoses use corrosion-resistant materials for durable contact with brake fluid and other service chemicals.
Detailed Control Design
A pressure gauge, metal hose fittings, pressure adjustment knob, indicator light, aviation power plug, safety device, and screw-column quick connector support service control and setup.
Reservoir Adapter Fitment
Match the reservoir adapter to the compatible vehicle opening and confirm its seal before service.
Pressure Protection
The pressure monitor detects pressure status and stops the machine if pressure cannot be generated or the pump draws in air, helping prevent air from entering the vehicle brake-fluid reservoir.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Prime, Seal and Bleed by Vehicle Sequence
1. Bleed The Device First
Before using the device, bleed the machine first. The oil reservoir on the vehicle must be filled to the maximum level.
2. Connect The Adapter
Find a suitable adapter and connect it to the vehicle brake fluid reservoir.
3. Build Initial Pressure
Press and hold the start button for 5-6 seconds to build pressure. Once pressure reaches above 0.6 bar, release the button.
4. Adjust Working Pressure
Adjust the working pressure. The operating guide usually recommends adjusting pressure to about 2 bar.
5. Open The Caliper Screw
After turning on the machine and adjusting pressure, loosen the wheel cylinder / brake caliper screw to start draining old brake fluid.
6. Check Used Brake Fluid Drainage
Check the layering and color of the fluid in the used brake fluid bottle. The darker layer is the used brake fluid.
7. Use The Correct Shutdown Sequence
After replacement is complete, tighten the wheel cylinder / brake caliper screw first, then turn off the machine. This prevents air from entering the system.
Air-Free Filling
Before first use, bleed the device and fill the internal tube with brake fluid to reduce the risk of air entering the braking system during replacement.
Prime Before First Use
Bleed the device and fill its internal tube with brake fluid before first use to reduce the risk of introducing air into the braking system.
Safe Use
Control Reservoir Seal, Pressure and Fluid Level
Default Vehicle Coverage
The AST603 compatibility image lists Benz, BMW, Audi, Skoda, Fiat, Lexus, Land Rover, Jaguar, Porsche, Buick, Ford, Chevrolet, Volvo, Citroen, Volkswagen, Peugeot, Renault, and more.
Prime the Fluid Line
Fill the delivery line with the specified brake fluid and remove air before connecting it to the vehicle.
Seal the Reservoir
Choose the matching reservoir adapter and check the cap and hose connections for leaks before building pressure.
Brake Fluid Protection
Brake fluid is toxic. Avoid skin and eye contact; wear safety goggles and protective gloves. If fluid contacts skin, wash immediately with water, remove contaminated clothing, and do not carry fluid-soaked cloths in clothing.
Unplug Before Service
Disconnect the power plug before working on the bleeder.
Do Not Open Machine
Do not modify or open the machine.
Inspect Before Every Use
Inspect it before each use, stop if an abnormality is found, and have repairs handled professionally.
Keep Bleeder Dry
Keep the bleeder dry and do not operate it in a damp environment.
Model Comparison
Choose the Right Brake Fluid Bleeder
Model Guide
Choose one or more models. AST603 is selected by default.
| Product Name | AST603 | AST605 | AST609 | AST612 | AST618 |
|---|---|---|---|---|---|
| Service Method & Capacity | |||||
| Working Principle | Fully Automatic One-Click Pulsating Oil Change |
Fully Automatic One-Click Pulsating Oil Change |
Fully Automatic One-Click Pulsating Oil Change |
Fully Automatic One-Click Pulsating Oil Change |
|
| Oil Bottles | 1L · 1 Used Oil Bottle |
1L · 1 Used Oil Bottle |
1.5L · 1 Old Oil Bottle 1L · 1 New Oil Bottle |
1.5L · 2 Old Oil Bottle 1L · 1 New Oil Bottle |
1.5L · 4 Old Oil Bottles 3L · 1 Integrated Stainless Steel Oil Bottle |
| Number of Brake Calipers | 1pc |
1pc |
2pcs |
2pcs |
4pcs |
| Shutdown Pressure Relief Function | × |
× |
× |
30 Seconds Pressure Relief Time |
10 Seconds Pressure Relief Time |
| Number of Brake Caliper Changed Simultaneously | Single-Wheel Oil Change |
Single-Wheel Oil Change |
Simultaneous Oil Change for Two Wheels |
Simultaneous Oil Change for Two Wheels |
Simultaneous Oil Change for Four Wheels |
| Maximum Output Flow Rate | 1.6L/min |
1.6L/min |
1.6L/min |
2.6 L/min |
1.6L/min |
| Pulse Settings | × |
× |
× |
× |
✓ |
| Working Pressure Adjustment | ✓ |
✓ |
✓ |
✓ |
✓ |
| Working Time Settings | × |
× |
× |
× |
✓ |
| Power, Pressure & Connections | |||||
| Input Voltage | AC 110/220 V or DC 12 V — match the selected power configuration |
110/220V |
110/220V or 12V |
DC12V |
DC12V |
| Working Pressure | 0.5-2.5bar |
0.7-3bar(±0.2bar) |
0.5-2.5bar |
1.5bar-3.0bar |
0.6-3.0bar |
| Compatible Connectors | 1 Type |
3 Types |
7 Types |
9 Types |
17 Types |
| Pressure Gauge | ✓ |
✓ |
✓ |
✓ |
✓ |
| Power Aviation Plug | ✓ |
✓ |
✓ |
× |
× |
| Mobility & Physical Setup | |||||
| Product Weight | 5.2kg |
5.3kg |
7.4kg |
8kg |
23.5kg |
| 360° Casters | × |
× |
× |
× |
✓ |
| Three-Section Telescoping Handle Design | × |
× |
× |
× |
✓ |
Manual & Support
Find the Manual and Bleeding Guidance
AUTOOL AST603 User Manual
Open the PDF manual for AUTOOL AST603 pulsating brake-fluid exchange, reservoir adapter setup, pressure monitoring, wheel sequence, fresh-fluid protection, used-fluid recovery and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL AST603 Brake Fluid Bleeder
- Power CableAviation power plug cable
- Fluid LineFilling hose / fluid line
- BottleUsed brake fluid bottle
- AdapterDefault compatible adapter
- ManualUser manual included
Buyer Questions
Bleeder Setup, Adapter and Fluid Questions
Does AST603 Need Manual Brake Pedal Pressing?
No. AST603 supports one-person operation and does not require repeated manual brake pedal pressing during normal brake fluid replacement.
What Pressure Should I Use?
The operation guide recommends building pressure above 0.6 bar first, then usually adjusting the working pressure to about 2 bar. The AST603 working pressure range is 0.5-2.5 bar.
Why Must The Device Be Bled Before First Use?
The device must be bled before first use so the internal machine tubing is filled with brake fluid. This helps prevent air from entering the braking system during fluid replacement.
How Do I Know The Old Brake Fluid Has Been Drained?
Check the layering and color of the fluid in the waste oil bottle. The darker layer is usually the old brake fluid.
What Is The Correct Shutdown Sequence?
After completing the brake fluid replacement, tighten the wheel cylinder / brake caliper screw first, then turn off the machine. This sequence is important because turning off the machine first may allow air to enter the system.
What If The New Oil Bottle Runs Out During Operation?
The low-fluid monitor stops the machine when the new-fluid bottle runs out, helping prevent air entry. Continue monitoring the bottle during operation: if it empties and the machine keeps running, air may enter the system.
Can AST603 Work With Electronic Power Brake Pumps?
When working with an electronic power brake pump, it is recommended to use the AST603 together with a diagnostic computer.
What Is The Difference Between AST603 And AST605?
AST605 includes two more compatible connectors than AST603, while the other core parameters remain similar.
When Should I Buy The 17-Piece Adapter Set?
Buy the 17-piece brake fluid changer adapter set if the default AST603 adapter does not fit your target vehicle, or if your workshop needs broader compatibility for more vehicle brands.
Hogan Hubbard ✓ Verified Purchase –
Works well, has long reaching power cord (around 6ft) and brake fluid hose.
Works well, has long reaching power cord (around 6ft) and brake fluid hose. Portable, light at around 10 ibs. Only drawback is that most over the counter brake fluid containers are smaller than the suction hose off of the machine. That, and only three adapaters for brake fluid reservoir. Granted, they are the 3 most popular modern styles. If you need another style though, you’ll most likely have to buy another adapter kit and modify the adapters to work with this machine.
Tom ✓ Verified Purchase –
This AST603 brake oil changer is really efficient.
This AST603 brake oil changer is really efficient. One‑button pulse operation makes brake fluid replacement easy, and it can even work on two sub‑pumps at the same time. The intelligent liquid level monitoring avoids air entering the system, and the corrosion‑resistant hoses are solid. It fits most car models and comes with clear gauges and stable connectors. Very professional and convenient for auto repair.
Alex ✓ Verified Purchase –
Excellent product, works well and they honor the warranty.
Excellent product, works well and they honor the warranty. It’s not the only device from this brand that I own, and they’ve all been excellent.