Adjusting Net Wrap Knife Arm Stop

NOTE: Knife arm stop adjustment determines the clearance between the knife and the rubber flap.

Check feed roll brake after adjusting knife arm stop.

1. Turn tractor key to ON position. Do not start tractor engine.

2. Momentarily press WRAP switch to return knife arm to "home" position (actuator extended) .

causym CAUTION: To avoid personal injury from unexpected knife movement, disconnect net actuator wiring connector or power plug.

3. Turn tractor key to OFF position. Remove key. Disconnect net wrap controller power plug from tractor convenience outlet.

4. Open net wrap cover.

AG,OUO1078,4 -19-11OCT99-1/4

causym CAUTION: Knife is sharp. Use care when working around the knife.

NOTE: Uneven gaps may appear between knife and flap due to natural waviness of the rubber flap.

If stop bolt (A) has been removed or replaced, adjust bolt to approximately 25 mm (0.984 in.) (B) and check clearance between knife and flap.

5. Clearance between knife and rubber flap should be to within specifications when actuator rod contacts stop bolt (A). Do not deflect flap when checking clearance.

Specification

Knife-to-Rubber Flap -Clearance 0.8-1.5 mm (0.031-0.059 in.)

  • Measure inward 76 mm (3 in.) from each end of flap and mark. Check for tightest clearance between marks with feeler gauge. Bend end of gauge, approximately 13 mm (1/2 in.), to a 45 degree angle. Flap contact is acceptable outside of marks.
  • If knife-to-rubber flap clearance is met at the tightest point and clearance exceeds 4 mm (0.157 in.) at other locations, rubber flap needs aligned with knife.

6. To align knife, loosen net guide bolts (C) and adjust flap to knife clearance. Tighten bolts (C).


A-Stop Bolt
B-Dimension, 25 mm (1 in.)
C-Net Guide Bolts

TS268
E40207
E41755

Actuator Removed For Illustration Only

AG,OUO1078,4 -19-11OCT99-2/4

The following symptoms may occur if the knife to belt clearance is too short:

  • Net material may cut off too cleanly and will not be visible below knife edge. If so, increase dimension (B) by turning bolt (A) 1/2 turn at a time. Net cutoff should leave several strings of net material hanging below knife edge but not long enough to touch the pan and belts.
  • Net material may wrap on upper surface wrap roll. If so, increase dimension (B) by turning bolt (A) 1/2 turn at a time.
  • Knife may clamp the wrap material after it is cut and cause NET CUTOFF indicator to stay lit. If so, increase dimension (B) by turning bolt (A) 1/2 turn at a time.

The following symptoms may occur if the knife to belt clearance is too long:

  • The net material may not cut off correctly. The NET CUTOFF indicator stays lit, and net material continues to feed to the bale. If so, decrease dimension (B) by turning bolt (A) 1/2 turn at a time.
  • The net material may snap back and wrap around the rubber roller when the next bale wrapping starts. The NET CUTOFF indicator does not flash. If so, decrease dimension (B) by turning bolt (A) 1/2 turn at a time.
  • It may not be possible to adjust the brake block to required torque. This may cause incorrect net cutoff. If so, decrease dimension (B) by turning bolt (A) 1/2 turn at a time.
E40207


A-Stop Bolt
B-Dimension

AG,OUO1078,4 -19-11OCT99-3/4

IMPORTANT: Lengthening stop bolt against actuator may damage actuator. Move actuator to mid stroke before adjusting stop bolt.

7. To change clearance between knife and rubber flap:

a. Connect net wrap controller power plug to tractor convenience outlet. Turn tractor key to ON position.

b. Move manual override switch to RETRACT position to move actuator to mid stroke.

c. Turn tractor key to OFF position. Remove key. Disconnect controller power plug from tractor convenience outlet.

d. Loosen jam nuts at stop bolt (A) and adjust accordingly:

  • To increase dimension between knife and rubber flap, turn bolt (A) counterclockwise 1/2 turn at a time until correct adjustment is obtained. Tighten jam nuts.
  • To decrease dimension between knife and rubber flap, turn bolt (A) clockwise 1/2 turn at a time until correct adjustment is obtained. Tighten jam nuts.

e. Connect net wrap controller power plug to tractor convenience outlet. Turn tractor key to ON position.

f. Momentarily press WRAP switch to cycle net wrap.

g. Turn tractor key to OFF position. Remove key. Disconnect controller power plug from tractor convenience outlet.

h. Check clearance between knife and rubber flap. Actuator rod must contact stop bolt (A).

8. Check net wrap switch adjustment. (See ADJUSTING NET WRAP SWITCH in this section.)

9. Close net wrap cover.

E41742


A-Stop Bolt

AG,OUO1078,4 -19-11OCT99-4/4