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

Vacuum Pump: Adjustments


With brake pedal depressed, push vacuum valve switch all the way into the retaining clip. Pull the brake pedal to the stop to automatically adjust the valve. On vehicle equipped with anti-lock brakes, release pedal and allow to come to rest. Vacuum dump valve assembly should open at 1-1 5/16 inch pedal travel, measured at centerline of brake pedal pad.