PUMP STOP
The pump stop prevents the pump lever from operating if the line is not properly justified. The short, or right-hand, vise jaw operates the pump stop operating lever. When the line is justified the right-hand jaw is moved to the right against the adjusting screw in the operating lever which forces the stop lever from under the catch block, allowing the pump lever to operate. If the line is not justified, the right-hand jaw does not touch the adjusting screw and the stop lever is allowed to remain under the catch block. This prevents the pump lever from operating.
The pump stop should have 1/32 of an inch between the pump stop lever and pot lever block when line is properly justified.
The pump stop lever is found under the pot lever block. It is connected to a bracket by a screw, and operated by a spring and operating lever. The adjustment is made with the screw in the operating lever.
To test this adjustment, push the right-hand jaw toward the right and observe if the lever is clearing the block the proper distance.
When the line is justified the pump stop operating lever, which is forced to the right by the short vise jaw, should have a trifle lost motion; if not, the position of the type on the right end of the slug would be regulated by the adjusting screw in the pump stop operating lever instead of the adjusting screw in the knife block.