®

NATIONAL 68 SR & DL TRIPLEX

SAFETY SWITCHES

 

 

Never attempt to remove or

 

DANGER

 

circumvent the safety switches.

 

 

Dangerous operating conditions may result.

 

 

 

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.

Main Engine

Wing Cutting

Seat Switch

Wing Cutting

68 DL

68 SL

(Operator

Unit Lift

Engine

Engine

Clutch

Unit Clutch

Presence)

Arms

Response

Response

 

 

 

 

 

 

 

 

ENGAGED

ENGAGED

OFF

DOWN

KILL

KILL

 

 

 

 

 

 

 

 

 

UP

KILL

KILL

 

 

 

 

 

 

 

 

ON

DOWN

RUN

RUN

 

 

 

 

 

 

 

 

 

UP

KILL

KILL

 

 

 

 

 

 

 

NEUTRAL

OFF

DOWN

KILL

KILL

 

 

 

 

 

 

 

 

 

UP

KILL

KILL

 

 

 

 

 

 

 

 

ON

DOWN

RUN

RUN

 

 

 

 

 

 

 

 

 

UP

RUN

RUN

 

 

 

 

 

 

NEUTRAL

ENGAGED

OFF

DOWN

RUN

KILL

 

 

 

 

 

 

 

 

 

UP

KILL

KILL

 

 

 

 

 

 

 

 

ON

DOWN

RUN

RUN

 

 

 

 

 

 

 

 

 

UP

KILL

KILL

 

 

 

 

 

 

 

NEUTRAL

OFF

DOWN

RUN

START &

 

RUN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UP

RUN

START &

 

 

 

RUN

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

DOWN

START &

START &

 

 

RUN

RUN

 

 

 

 

 

 

 

 

 

 

 

 

 

UP

START &

START &

 

 

 

RUN

RUN

 

 

 

 

 

 

 

 

 

 

68OM-06/03

49

Page 49
Image 49
National Mower 68 DL, 68 SR owner manual Safety Switches, Response

68 SR, 68 DL specifications

The National Mower 68 DL and 68 SR are two outstanding models in the world of lawn care, engineered for efficiency and ease of use. Both mowers offer a range of features tailored to meet the needs of both residential and commercial users, making them popular choices among landscapers and homeowners alike.

The National Mower 68 DL is designed with durability and performance in mind. It features a robust steel deck that enhances longevity while providing a clean and even cut. Equipped with a powerful engine, the 68 DL delivers high torque and swift acceleration, enabling users to tackle even the toughest grass and rough terrain effortlessly. The mower's advanced cutting system ensures that grass is cut finely and evenly, reducing the need for additional clean-up.

On the other hand, the National Mower 68 SR offers a self-propelled option, allowing users to move with ease across various landscapes. This model incorporates hydrostatic transmission technology, which provides smooth, variable speed control. This feature is particularly beneficial for those who demand precision in their mowing tasks, as it allow for adjustments on the fly, catering to changing terrain conditions.

Both models come with adjustable cutting height options, offering users the flexibility to choose their desired grass length. The easy-to-use lever enables quick and simple adjustments without needing tools, making the mowing process more efficient. Additionally, both the 68 DL and 68 SR are designed with ergonomics in mind, featuring comfortable handles and intuitive controls that minimize operator fatigue.

Safety is another critical consideration in the design of the National Mower 68 series. Both models come equipped with protective shields and safety switches to prevent accidental starts, ensuring that users can operate the machines with confidence.

For convenience, the mowers also feature large, easy-roll wheels that enhance maneuverability. The inclusion of a bagging system offers an option for collection of grass clippings, contributing to a cleaner lawn appearance post-mowing.

In summary, the National Mower 68 DL and 68 SR combine advanced engineering with user-friendly features that prioritize performance and safety. They are exceptional choices for anyone looking to maintain a pristine lawn with minimal effort, making yard work a more enjoyable task. Whether for home use or professional landscaping, these mowers stand out in their class, delivering reliable performance time after time.