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Breakaway Section Adjustment
The function of the breakaway section is to prevent or reduce boom
damage, should it strike an object or the ground.
Adjust the nut (A), until the breakaway will release at a force of 80 N at
the extremity.
÷
NOTE! The clutch must be well greased before adjustment is
commenced.
The SPC boom type breakaway is shown here. The same principle
applies for the SPB boom type.
Adjusting the Front Fold Cable
The performance of the SPB/SPC boom while spraying depends very
much on the front fold cable adjustment. A correctly adjusted cable will
also control the movement of the outer wing.
±
WARNING! The rear cable can snap and injure you or someone
else if tensioned when the boom is unfolded. Always adjust the
front cable first - with the boom unfolded and the rear cable last
- with the boom folded in transport position.
1. Unfold the boom.
2. Check security of turnbuckle anchors to its hinges.
3. Slide a straight edge (A) down the underside of the inner wing
until it contacts the front cable = contact point (B).
4. Suspend a weight of 4.5 kg (C) from the straight edge-to-cable
contact point (B) and check deflection by measuring the distance
from the straight edge to the cable. Cable should deflect 13-22
mm (D).
If adjustment is necessary:
5. Loosen counternuts (E) on the turnbuckle assembly and adjust
turnbuckle (F) for proper cable deflection.
6. Tighten counternuts (E) again and remove weight.
±
WARNING! Check boom alignment again. If front cable was
tightened, the wing assembly will move a bit forward. If front
cable was loosened, the wing assembly will move a bit rearward.
Therefore, adjust fold cylinder, if necessary, as described in the
section 'Alignment of centre section and inner wings' .
6 - Maintenance
145
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