Figure 7.19 :
Plastic tying unit, location
7.8.1 Control and maintenance
1. Clean and lubricate the slides for feed rollers.
2. Check the chain tension and the chain condition.(SeeFigure 7.20) Adjust the tension by loosening the
bolt and turn the nylon eccentric to add more tension to the chain. Then retighten the bolt.
3. Check all movable parts and bearings in the tying unit.
4. Check the condition of the hydraulic hoses and couplings. Examine the unit for any leakages.
5. Control the free wheel function (feed rollers).
Figure 7.20 :
Free wheel, seen from
wrapping table
Figure 7.21 :
Feed rollers, seen from oper-
ator's platform
7.9 WRAPPING TABLE
7.9.1 Inspection
Check the function of both emergency stop handles. Tighten the hinge bolts so that the handles barely
returns to the start position. If the hinge bolts are too loose, the emergency stop handles may be triggered
unnecessary. Also check that the wrapping film crosses the film cutter in the center of the knife bed. See Fig-
ure 7.23.
7 MAINTENANCE AND MECHANICAL ADJUSTMENTS 67
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