Hyundai HYMT5080 User Manual page 16

4.6 Adjust the chain tension by turning the tensioner
screw (1) until the tie straps just touch the bottom of the
bar rail.
4.7 Tighten the mounting nut securely with the bar
tip held up. Whilst wearing safety gloves check the
chain for smooth rotation and correct tension whilst
moving with hand.
Pay attention to the correct direction of the saw chain.
It is very important to maintain proper chain tension. Rapid wear of the
guide bar or chain coming off easily can be caused by improper tension
When using a new chain take great care to check adjustment because the
chain will expand when first used.
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