What this tool is used for
- Retracting compatible brake pistons
- Rotating pistons that use an approved mechanical design
- Supporting pad service after hydraulic and parking-brake requirements are identified
A tool produces useful evidence only when its rating, setup, test conditions, and reference limits are correct.
- 01ChooseRetracting compatible brake pistons
- 02Set upIdentify caliper design and electronic parking-brake requirements / Inspect fluid level, hoses, boots, piston condition, and tool adapters
- 03MeasurePrepare the vehicle and parking-brake system / Select the exact adapter and alignment
- 04InterpretForcing the wrong piston design can damage the caliper or parking brake
- 05RecordPreserve setup, conditions, result, and next test
Follow the sequence, stop when evidence changes the path, and verify the exact vehicle information before acting.
Before you use it
Identify caliper design and electronic parking-brake requirements
Inspect fluid level, hoses, boots, piston condition, and tool adapters
Use the specified service mode and support procedure
A test-first working method
Prepare the vehicle and parking-brake system
Preserve the conditions and result so the measurement can support—or reject—the current diagnostic theory.
Select the exact adapter and alignment
Preserve the conditions and result so the measurement can support—or reject—the current diagnostic theory.
Retract slowly while monitoring fluid and resistance
Preserve the conditions and result so the measurement can support—or reject—the current diagnostic theory.
Reassemble, restore service mode, seat the brakes, and verify pedal operation
Preserve the conditions and result so the measurement can support—or reject—the current diagnostic theory.
What the tool cannot prove by itself
- Forcing the wrong piston design can damage the caliper or parking brakeInterpret the result with circuit, system, operating-condition, and source context.
- Retraction does not correct a seized slide, restricted hose, or contaminated systemInterpret the result with circuit, system, operating-condition, and source context.
- Electronic service mode requirements varyInterpret the result with circuit, system, operating-condition, and source context.
Safety boundary
Brake work is safety-critical
Support the vehicle correctly, protect the hydraulic system from contamination, and establish a firm pedal before the vehicle moves.