3.6
Lubrication and maintenance operations
3.6.18 Conveyor chain tensioning Calculate the sag of the conveyor chain by measuring the distance between the ground and the left conveyor chain (1) or the right conveyor chain (2), always in the central part of the chain. The chain is correctly tensioned hen there is an approx. 30 – 40 cm sag (1.2 – 1.6 in) in the middle.
1
Chain sag calculation procedure: •
The procedure is identical for the left (1) and right (2) conveyor chain.
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Measuring the distance between the ground and the chain in the middle part of the chain (1).
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Press the chain upwards in the middle part of the chain (1) and measure the distance between the ground and the chain again.
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Calculate the sag of the chain (1) by deducting the two measured values.
•
The chain is correctly tensioned hen there is an approx. 30 – 40 cm sag (1.2 – 1.6 in) in the middle.
2
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Chain tensioning procedure: •
The procedure is identical for the left (1) and right (2) conveyor chain.
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Loosen the lock nut (4).
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Tension the chain using the adjusting nut (5).
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Calculate the sag of the chain (1) by deducting the two measured values according to the procedure above.
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If the calculated sag is in the range of 30 – 40 mm (1.2 – 1.6 in), tighten the lock nut (4).
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Tension the chain equally on both sides of the machine.
30-40 mm (1,2-1,6 in)
1 451200
Note •
In case of too high chain tension, loosen the lock nut (4) and the adjusting nut (5).
•
Calculate the sag of the chain (1) by deducting the two measured values according to the procedure above.
Belt tension check: •
Check chain movement. -
Start the engine.
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Let the conveyor running in the manual mode.
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Check the correct running of conveyor chains.
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Stop the conveyor.
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Turn off the engine.
158
4
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Perform tensioning of the conveyor chains with the machine parked on a flat and solid surface with the engine and battery disconnecter off. Wear the prescribed personal protective equipment when tensioning the conveyor chains. There is a risk of burns from the hot parts of the conveyor. Caution! Tension the chain equally on both sides of the machine.
F80W
