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This guide is for DIY mechanics and professional technicians performing brake maintenance. The Neilsen CT3934 Brake Caliper Press simplifies brake pad replacement by allowing for easy and safe piston retraction. A minor caveat is that users should ensure compatibility with their specific caliper type before purchase, though it covers most common variations. Key features include a 360° ratchet mechanism, parallel force application, and bi-directional functionality for spreading and retracting pistons.
| Model Part Number | CT3934 |
|---|---|
| Brand | Neilsen |
The Neilsen CT3934 is compatible with twin piston fixed calipers, quad piston fixed calipers, and floating calipers.
No, this specific model is not designed for single-piston calipers. Single-piston calipers typically require a different type of retraction tool.
The tool's design ensures parallel force application when correctly positioned against the piston and the caliper body or reaction pin. Ensure the plates are making full contact and the tool is perpendicular to the piston face.
The 360° ratchet design allows the user to engage the tool and operate the ratchet from any angle, which is particularly useful in tight engine bays where access is limited.
It is recommended to lubricate the screw mechanism periodically, especially after cleaning or if you notice stiffness, to maintain smooth operation and prevent rust.
The bi-directional function means the tool can be used to both spread the caliper pistons apart (to create space for new pads) and retract them (to recess them back into the caliper body).
Clean any debris from the ratchet gears. Apply a small amount of lubricating oil to the mechanism and work the handle back and forth until smooth.
Ensure the tool is centered on the piston and the plates are seated correctly. Verify that the caliper itself is not binding or damaged, which could affect piston movement.
Double-check that the tool is compatible with your specific caliper type. Ensure there are no obstructions or damage to the piston or bore. For stubborn pistons, a slight back-and-forth motion while applying pressure may help.
Setup: The tool is designed for immediate use. Ensure the caliper pistons are clean and free of excessive rust or debris before engaging the press. Position the plates against the brake pad and piston, then operate the ratchet handle.
Compatibility: This tool is compatible with twin piston fixed calipers, quad piston fixed calipers, and floating calipers. It is recommended to visually inspect your vehicle's calipers to confirm they match the types supported by this tool. It is not designed for single-piston calipers which typically require a different type of spreader.
Care: After each use, wipe the tool clean with a dry cloth. Apply a light coat of lubricant to the screw mechanism periodically to ensure smooth operation. Store in a dry environment to prevent rust. Avoid exposing the tool to excessive moisture or corrosive substances.
