Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Disc Runout

Disc Runout Inspection
1. Loosen the front wheel nuts slightly, then raise the vehicle, and make sure it is securely supported. Remove the front wheels.
2. Remove the brake pads.
3. Inspect the disc surface for damage and cracks. Clean the disc thoroughly, and remove all rust.






4. Use wheel nuts and suitable plain washers to hold the disc securely against the hub, then mount a dial indicator as shown, and measure the runout at 10 mm (0.4 inch) from the outer edge of the disc.
5. If the disc is beyond the service limit, refinish the brake disc with an on-car brake lathe. The Kwik Lathe produced by Kwik-way Manufacturing CO. and the "Front Brake Disc Lathe" offered by Snap-on Tools CO. are approved for this operation.

NOTE: A new disc should be refinished if its runout is greater than 0.10 mm (0.004 inch)