Duratech TC-12, Operating Instructions And Parts Reference

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T C - 1 2 T R E E C H I P P E R O P E R A T I N G I N S T R U C T I O N S
5.11 Changing knives
Knives should always be replaced in pairs. Pairs are determined by the amount of resharpening done to the knives. Re -
install with another knife of comparable usage. This helps to keep the disc balanced and it maintains chip quality.
ALWAYS FOLLOW NORMAL SHUT DOWN PROCEDURE!
1. With chipper properly shut down, open disc hood and insert disc lock pin through hole in chipper
housing and hole in disc that allows access to knives to be changed.
2. Loosen nuts and remove bolts and knife. Either rotate knife and replace, or insert new replacement knife,
insert bolt and tighten to 125 ft-lbs (17.28 m-kg).
3. Always use same generation knives on the disc. Never install one or two resharpened knives with new
knives. All knife surfaces should have the same clearance from the disc face. Failure to use like knives
will cause premature knife and anvil wear.
4. Using anvil adjustment procedure from above, set anvil to 0.05-0.10” tolerance.
5. Replace hood and insert hood pin.
Disc locking pin (in the locked position)