Tufline TW6 Series, Operator'S Manual, Page: 19 / 32

Maintenance 16
FIG. 6
LEVELING SYSTEM
The leveling system automatically controls the harrow from full depth penetration all the way
up to transport height. Once it is set for a particular tractor drawbar height, only minor adjustments will
ever be required. The springs allow pressure controlled flexibility when obstructions and/or uneven
terrain are encountered.
1. Be sure that the 8 ½ “ spring, Ref. 7, Fig. 6, is in front and goes into the recess of the trunnion
, Ref. 8. Tighten one nut, Ref. 11, until the springs measure 12 ½” from end to end. Use one nut,
Ref.11, to jam and lock the adjustment. Except to increase or decrease flexibility, you will never need
to adjust these springs again.
2. Position the rocker arm and link bar weldment, Ref. 1, between the brackets on the front of the
main frame and insert the pin, Ref.2. Be sure offset in rocker arm is to the right as shown and that the
bottom ends are clipped off on the rear corner.
3. Loosen the bolt, Ref.5, and insert the trunnion, Ref. 8, into the slots. Then place both retainer
straps, Ref. 3, over the trunnion ears and tighten bolt, Ref.5.
4. Apply a little oil to washers and nuts at each end of the springs so that the adjusting rod, Ref.6, can
be turned easier.
5. Attach the adjusting tube, Ref. 12, with the ¾ “ x 2 ½ “ Gr.5 hex bolt, Ref. 14. Screw the adjusting
rod, Ref. 6, until the top of the tongue is about 22” above the ground with the gangs on the ground.