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 Master Cylinder

Piston To Pushrod Clearance -
Note: Clearance between booster pushrod & piston at idle vacuum, .004-.020 inch; clearance between booster pushrod & piston with no vacuum,.024-.026 inch.