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The Sealey Magnetic Camber and Caster Gauge (GA47) is an essential diagnostic tool for automotive technicians and DIY mechanics looking to achieve precise vehicle suspension alignment. It provides an efficient way to measure and adjust camber and caster angles by mounting directly to the hub or brake disc, ensuring professional-grade results. While highly accurate for standard workshop tasks, users should note that it requires a level surface and careful calibration to ensure the readings are perfectly representative of the vehicle's geometry.
| Model Part Number | GA47 |
|---|---|
| Brand | Sealey |
No, the magnetic base requires a steel surface; it must be attached to the hub or brake disc, not the alloy wheel itself.
The GA47 is specifically designed for camber and caster angles; you would need a tracking gauge to measure toe-in or toe-out.
While pre-calibrated, you should always check the zero point on a known level surface before taking critical measurements.
You measure caster by using the adjuster knob to set the bubble, then turning the steering wheel to specific lock angles as per the vehicle manufacturer's procedure.
The GA47 is a 2-piece set, which is useful for checking both sides of the front suspension.
Clean the hub or brake disc surface thoroughly of rust and dirt; ensure the hub is steel and not aluminum.
Ensure the device is not being stored in extreme cold; gently tap the gauge to see if the bubble is caught, or inspect the dial for obstruction.
Verify the vehicle is on a perfectly level floor and that the gauge is seated flush against the mounting surface without gaps.
Setup is straightforward: ensure the mounting surface on the vehicle's hub or disc is free of heavy rust or debris to allow the magnet to achieve full contact. The device is compatible with most standard vehicle hubs, though it will not attach to aluminum or other non-ferrous surfaces.
Maintenance involves keeping the gauge free of grease and metallic filings that might interfere with the magnetic base. Always store the gauge in a protective case or a clean, dry drawer when not in use to prevent damage to the bubble level mechanism or the calibration scale. Periodically verify the bubble level against a known flat surface to ensure the internal fluid hasn't leaked or shifted.
