F 71 6
1.2 Maintenance points
Chain tension (1)
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If the chains are not tensioned sufficient-
ly, they can slip out of their guide formed
by rollers, drive gear and idler wheel,
thereby increasing wear levels.
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If the chains are tensioned too tightly, this increases wear on the idler wheel and drive
unit mounting, and also increases wear on track bolts and bushes.
Checking / adjusting chain tension
- The chain tension is adjusted with
grease tensioners. The filling ports (A)
are located on the RH and LH sides of
the drive unit frame.
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