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NATIONAL 68 SR & DL TRIPLEX
®
13
68OM-06/03
CAUTION
REAR CUTTING UNIT BELT
Install Rear Cutting Unit Belt (A) from Countershaft Pulley
(B) to outer Drive Pulley (C). Idler Pulley (D) must ride on
top of lower belt to provide proper tension. NOTE: It will be
necessary to raise rear cutting unit to allow enough slack
to get belt over pulleys.
WING CUTTING UNITS
1. Remove the two Wing Cutting Unit Belts from the
steering column.
2. Release the Laches (A) from Wing Cutting Units. To
release the latch, lift the wing cutting unit handle until
the latch swings upward into a nearly vertical position.
Carefully lower the cutting unit to the ground. Avoid
dropping the cutting unit, as damage may result to the
cutting unit, the mower, or your turf.
3. Slip wing Cutting Unit belts (B) over Countershaft
Pulleys (C).
4. Block mower wheels to prevent mower from moving
forward. Pull Wing Cutting Units (D) forward so that
they slide on Pull Rods (E) and compress springs (F).
This will allow enough slack to enable belts to be
installed over Reel Pulleys (G).
5. Pull Cutting Units backwards to adjust belt tension.
Tighten bolt (H) to lock in place.
REEL TO BED KNIFE ADJUSTMENT
To prevent damage during shipment, the reels have been
moved away from the bed knives at the factory. Follow
the procedure for "Reel to Bed Knife Adjustment" in the
Maintenance section of this manual to properly adjust
your cutting units.
ENGINE
MOWER IS SHIPPED WITH DRY
ENGINE. DO NOT START ENGINE
UNTIL OIL IS ADDED TO CRANKCASE. See Engine
Manual for additional information.
DIFFERENTIAL
Grease has been installed in the differential at the factory.
For additional information, refer to the Maintenance sec-
tion of this manual.