PREPARATION

Handle cutting units carefully with DANGER protective gloves. Reels and bed

knives are very sharp. Reels rotate freely and rotating one reel can cause other reels to rotate.

FUEL - Check fuel level. Add fuel as required. Refer to the engine manual for type of fuel and other safety requirements.

ENGINE COOLING - Keep engine cowlings clear of clippings.

CAUTION

Moving machinery can be dangerous

LUBRICATION - Add lubricant to pivots and other

if not operated properly. Follow all safe operating suggestions listed in the Safety Information section of this manual.

Check the following items before each use of the mower.

TIRE PRESSURE - Use a tire pressure gage to check the tire pressure. Fill tires with compressed air as needed to obtain the pressure labelled on the sidewall of the tire.

ENGINE OIL - Check level on dipstick. Refer to the engine manual for instructions on adding oil and which oil viscosity to use.

lubrication points as required. Refer to the lubrication chart in the Maintenance section of this manual.

REELS CLEAR OF DEBRIS - Remove any debris that may be tangled in the cutting reels. Keep the reel shaft and bearing clean of grass or other debris buildup.

SAFETY SWITCH OPERATION - Check operation of all safety switches. Do not use mower if safety switches are disconnected or not operational, as dangerous conditions will result.

OPERATION

The following is a description of the machine controls and their function.

A. Main Clutch Lever

WARNING Engage slowly before full engagement. Always disengage

the drive when stopping or leaving the machine.

Engages power for travel and mowing. Down position is disengaged and up position is engaged.

The engine clutch lever has an electrical interlock and engine will not start if clutch is engaged. For added safety, the interlock system should be checked periodically to ensure that it is adjusted to function properly.

B. Engine Throttle Lever – Regulates mowing and travel speeds. Moving the control handle back will reduce engine speed for starting and idling engine. Push forward to increase engine speed. Never travel at speeds faster than required for proper mowing.

C. Wing Cutting Unit Clutch Lever – Engages drive to Wing Cutting Units. Pull lever back and down to engage. Never engage drive unless Wing Cutting Units have been lowered to cutting position.

Engine Choke Lever (No photo) - Located near the upper rear right corner of the engine. Use the choke when starting a cold engine. See the engine manual for engine starting information and proper use of the choke.

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National Mower 68 SR, 68 DL owner manual Preparation, Operation, Main Clutch Lever

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.