Jim Carter's Old Chevy Trucks - Classic Chevy & GMC Truck Parts for all of your restoration needs! 1000's of parts in stocks now!

Posts Tagged ‘hand pump’

Hand Pump Tests Automatic Spark Adjustment

Thursday, February 11th, 2010

To provide suction for checking the adjustment of an automatic, vacuum operated spark advance on the distributor of a car, an ordinary tire pump can be used. Remove the ball, check valve from the base of the pump and reverse the position of the leather washer. Then when the handle is drawn upward, air will be sucked into the pump hose, creating a vacuum.

hand pump