Jackson MSC JP-24F, Service Manual

Page: 23 / 64

SERVICE PROCEDURES continued
A. To adjust the timer cams
On both sides of the adjustable cams, there are holes into which the spanner wrench is placed to apply
leverage to make the desired change. The left side of the cam will always start an operation and the right
side will end it. The cam on the right side is the one that will be adjusted more often since this one
determines the length of the operation. NOTE: Adjustments to timer cams are the responsibility of the
installer or chemical representative and are not covered by the warranty.
When making adjustment to the timer cams be sure that the first cam next to the time motor is in its stop
position in the notch. Hold cams in place while making adjustment. Place the wrench in the holes on the
right side of cam. If a shorter operating time is desired, decrease the gap between the left and right side of
the cam. At the extreme end from the timer motor, there is a cam marked in degrees. Every three degrees
equals one second of the timer's revolution/cycle.