National Mower DL TRIPLEX - CE, Owner'S Manual

68OMCE-10/01-350

16

ADJUSTMENTS

To ensure safety, all of the following adjust-
ments must be made only after the engine
clutch lever has been disengaged and the
ignition key and spark plug wire have been
removed.

HEIGHT OF CUT

The height of cut is variable and may be adjusted on

both wing mowers and the rear mower by loosening the

top and bottom Adjusting Nuts (1, Fig. I) which hold Roller

Adjusters (2, Fig. I) in Roller Brackets (3, Fig. I). Roller (4,

Fig. I) may then be moved up and down.

It is important to get all rollers adjusted to the same

height so that there will be uniform cutting across the

FIGURE  I

NOTE

Guards removed or cut

away to show detail

entire width of the mower. Do not adjust by sight. Place the

mower on a hard, level surface. Loosen the Adjusting

Nuts (1, Fig. I) on each side of  reel assemblies and place

a board or gauge plate of the desired  height under each

bed knife back bar. Tighten bolts securely.

REEL TO BED KNIFE ADJUSTMENT

The reel is adjusted to a fixed position bed knife. This

construction allows a more rugged and durable frame and

retains the proper adjustment longer. The Reel Adjuster

Bolt (5, Fig. I) regulates reel distance from the bed knife.

To reduce the distance, turn the upper hex adjuster nut

on each side of the reel down. Proceed slowly and do not

overadjust—use about 1/8 of a turn on each side at first.

Do not adjust one side more than the other unless the reel

is obviously out of alignment. Do not get the reel so tight

that it is hard to turn by hand. A too tight reel will wear much

faster. Ideally, the reel should “wipe” or lightly touch the

bed knife. It is not necessary to adjust or change the

position of the lower adjustment nut.

Proper cutting action may be tested by holding paper

strips between the reel and the bed knife. Turn the reel by

hand and check to see if the assembly cuts the paper all

the way across the width of the bed knife. Make sure that

the adjusting and the locking nuts on both side are

tightened securely.

Handle reel assemblies carefully with

protective gloves.

Reels rotate freely and are very sharp.

Special care should be taken in the area

where the reel contacts the bed knife.

REEL END PLAY ADJUSTMENT

With extended use, normal wear of the reel bearings

will cause end play. This condition could cause uneven

wear to mower parts and uneven cutting of turf.

Test for end play periodically by trying to move the reel

from side to side in the frame. If there is ANY movement,

adjust the bearings by loosening the lock nut on the

adjustment bolt (6, Fig. I) which is located on the inside

right end of the reels, and turning the adjustment bolt IN

one half turn or less. Do not overtighten. An overtightened

bearing will cause excessive bearing wear. Test again for

end play and if reel is rotating freely and end play is not

noticeable, tighten the lock nut.