Assembly Instructions

NATIONAL® 68" SR & DL TRIPLEX – CE

REAR MOWER

1.Remove two 1/2" x 1-1/2" Hex Head Bolts (1, Fig. B) and nuts from the shipping position in the Seat Hinge assembly (2, Fig. B). Position Seat Hinge Assembly with pivot facing rearward, over the seat mount of the mower frame and fasten with Bolts (1, Fig. B) and lock nuts.

2.Pivot Seat Brace (3, Fig. B) from the axle so that the top end aligns with the tab at the back of the seat hinge assembly. Fasten with a 5/16" x 1" Hex Head Bolt, Lock Washer and Hex Nut.

3.Remove the Lifter Tee (4, Fig. B) from the shipping position in the Pivot Tube (5, Fig. B) and set aside cotter pin and washer for later use. Insert the rod end of lifter tee through the slotted hole in the pad on the rear mower frame and secure with the cotter pin and washer as shown.

4.Fasten Rear Mower Pull Rod (6, Fig. B) inner leg by removing Bolts (7, Fig. B) and reinserting it through pull rod and attaching flanges on tractor axle. Note that Spacers (8, Fig. B) must be in each pivot point to allow free movement of the pull rod.

5.Attach Pull Rod (6, Fig. B) to Pivot Tube (9, Fig. B) with Pin (3, Fig. K on page 17) and Spacers (1, Fig. K). NOTE: Before completing assembly, it will be neces- sary to refer to the rear Mower Drive Belt Tension section and Figure K, page 17 for adjusting belt tension.

6.Install Rear Mower Belt (10, Fig. B) from Countershaft Pulley (11, Fig. B) to outer Drive Pulley (12, Fig. B). Idler Pulley (13, Fig. B) must ride on top of lower belt to provide proper tension. NOTE: It will be necessary to raise rear mower to allow enough slack to get belt over pulleys.

SEAT

1.Fasten Seat (15, Fig. B) to seat mounts by threading four 5/16" x 1" Hex Bolts (16, Fig. B), through 5/16" lockwashers, through holes in seat mounts and into the threaded holes in the bottom of the seat.

WING MOWERS

1.Remove Wing Mower Belts (17, Fig. B) from the steer- ing column.

2.Unlock Hooks (18, Fig. B) from Wing Mower Assem- blies (19, Fig. B), lower them carefully to the ground. Slip wing mower belts over Countershaft Pulleys (20, Fig. B).

3.Block mower wheels to prevent mower from moving forward. Pull Wing Mower Assemblies (19, Fig. B) forward so that they slide on Pull Rods (21, Fig. B) and compress springs. This will allow enough slack to enable belts to be installed over Reel Pulleys (22, Fig. B).

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. Refer to the Maintenance Section, page 7, for additional information.