Checking radial and lateral run-out of wheels and tyres with wheel balancing machine centring systemVAS 5271 — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017), Audi A5 Cabriolet (8F), Audi A8 D4 (4H, 2010–2017), Audi A4 Cabriolet B6/B7 (8H), Audi A2 (8Z), Audi A3 (8L, 1996–2003), Audi A4 B5 (8D), Audi A4 B6/B7 (8E), Audi A6 C5 (4B), Audi A8 D2 (4D), Audi A8 D3 (4E, 2002–2010), Audi A3 (8P, 2003–2012), Audi TT Mk1 (8N), Audi A6 C6 (4F, 2004–2011), Audi TT Mk2 (8J, 2006–2014), Audi A5 (8T, 2007–2016), Audi A4 B8 (8K, 2007–2015), Audi Q7 (4L, 2005–2015), Audi A6/A7 C7 (4G, 2011–2018), Audi A1 (8X, 2010–2018), Audi A3 (8V, 2012–2020), Audi Q3 (8U, 2011–2018), Audi Q7 (4M, 2015–), Audi R8 (4S, 2015–); platform codes 8C, 4A, 8G, 42, 4X, FV

• Special tools named: dial gauge

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• On rims with bonded wheel trims, take care not to scratch the wheel trims.Wheel trims have a very sensitive surface.If a wheel trim is damaged, the rim must be renewed.The wheel trim cannot be renewed.
• If the difference is greater than 1.3 mm, the lateral run-out is too great.
• If the difference is greater than 1 mm, the radial run-out is too great.

📋 Procedure

1. Clamp wheel on wheel balancer. [Note: On rims with bonded wheel trims, take care not to scratch the wheel trims.Wheel trims have a very sensitive surface.If a wheel trim is damaged, the rim must be renewed.The wheel trim cannot be renewed.]
2. Use wheel balancing machine centring systemVAS 5271.
3. Preload dial gauge about 2 mm.
4. Apply dial gauge to sidewall of the tyre as shown in illustration.
5. Slowly rotate the wheel.

6. Note the smallest and the largest dial readings. [Note: If the difference is greater than 1.3 mm, the lateral run-out is too great.]
7. Preload dial gauge about 2 mm.
8. Apply dial gauge to running surface of the tyre as shown in illustration.
9. Slowly rotate the wheel.
10. Note the smallest and the largest dial readings. [Note: If the difference is greater than 1 mm, the radial run-out is too great.] [Note: If the measured value exceeds the specification, acceptable smoothness cannot be attained.]

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