National Mower 68 DL, 68 SR owner manual Safety Switches, Response

SAFETY SWITCHES

Your National 68 mower is equipped with safety switches to monitor the operating conditions of certain machine functions and stop the mower whenever unsafe conditions are found.

It is necessary for both the main engine clutch and the wing cutting unit clutch to be in their neutral position to start the engine. The 68 DL also requires the operator be in the seat. The 68 SR does not require the operator to be in the seat to facilitate use of the hand recoil starter.

If you encounter difficulties starting the mower’s engine, or keeping it running, check the chart below to make sure you are not causing the engine to kill or become unable to start.

With the engine off, and the ignition key removed, check the switches regularly to make sure they are unobstructed by grass clippings or other material. Make sure the electrical terminals remain clean and dry and the pivot mechanisms for each switch operate freely.

Never spray the mower safety switches directly with high- pressure water.