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: Testing and Inspection


Fig. 18 Vacuum Pump Testing:






1. Connect a Mity Vac or suitable vacuum device to ACT side of pump Fig. 18.
2. Disconnect connector, then connect positive battery lead to terminal 1 and negative battery lead to terminal 2.
3. Ensure there is vacuum of a minimum of 7.87 inch Hg. or above.