Chain Adjustment - Husqvarna TC449 Workshop Manual

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1 edition (08-2010) _Rev. 11-2010
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SETTINGS AND ADJUSTMENTS

Chain adjustment

Chain should be checked, adjusted and lubricated as per the Maintenance
Chart to ensure safety and prevent excessive wear. If the chain becomes badly
worn or is poorly adjusted (i.e., if it is too loose or too taut), it could escape from
sprocket or break.
Check that chain has a max. 5 mm (0.04 in.) gap (A).
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If it is not, proceed as follows:
- on the right side, with a 27 mm Allen wrench, loosen the locking nut (2) of the
wheel axle;
- loosen the check nuts (3) on both chain tensioners, with a 12 mm wrench, and
work on the screws (4) with a 10 mm wrench to achieve the right tension;
- when the adjustment is completed, tighten the check nuts (3) and the wheel
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axle nut (2).
Once adjustment is over, always check that chain has a max. 5 mm (0.04 in.) gap.
Check wheel alignment and fully tighten its pin (142.1 Nm - 14.1 Kgm - 104.8 ft-lb).
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Incorrect chain tension involves excessive and early wear of the chain
slider lower part; periodically check for wear and replace it if worn out.
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