215318
12
Revision B
3.4
Tightening Reel Drive Chain
A correctly tensioned drive chain ensures optimum power transfer while minimizing component wear.
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Figure 3.9: Reel Drive
IMPORTANT:
Do
NOT
loosen the motor mount, it is factory-adjusted and
secured together with Belleville washers. Chain tension is
adjusted without loosening the drive mounting bolts.
1.
Place wrench (A) onto chain tensioner (B).
2.
Rotate wrench (A) downward until the chain is tight.
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Figure 3.10: Reel Drive
IMPORTANT:
There should be approximately 38 mm (1 1/2 in.) of play on
one side (A) of the chain, while it is tight on the other
side (B). This level of tension and play in the chain is
required to skip one notch on the chain tightener.
4.
Once the chain is tight, rotate the wrench upward to
properly engage the teeth from the lock/latch into the
tightener teeth. If the tightener will not skip a tooth before
tightening, do
NOT
force the tightener to the next notch.
IMPORTANT:
Do
NOT
overtighten the chain. If overtightened, the chain
will put excessive loads on the sprockets, causing motor
bearings and/or other components to fail prematurely.
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Figure 3.11: Reel Drive
5.
Rotate the reel by hand to verify that the chain is still
engaged properly on all teeth on lower sprocket (A). To
prevent damaging components, ensure the chain does not
get too tight as the reel is rotated.
6.
Return the wrench to the storage position.
7.
Close the left endshield. For instructions, refer to the
header operator
’
s manual.
