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)

Or, hide this message: temporarily or permanently

Brake Caliper: Testing and Inspection

Cylinder Boot





Check boots for breakage, crack and damage. If defective, replace.

Piston Seal





Excessive or uneven wear of pad lining may indicate unsmooth return of the piston. In such a case, replace rubber seal.