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ROUTINE MAINTENANCE
CHIP QUALITY:
Before trying to get chip quality it should be noted that a Drum Chipper was not designed to give you the type of chip quality
that a Disc Chipper can give you. However you do have some control of the chip size and the amount of overs you produce.
What adjustments can I make to get the chip quality I want?
1� The bed chain and feed wheel speeds are adjustable. The feed system is set at 100% of the speed capability when
manufactured, tested, and adjusted at the factory before shipping. You can slow down the feed system from there by
adjusting the ow controls in the sub plates mounted on the side of the machine to assist in creating a smaller chip.
2� It is not recommended that you change the knife lengths to try and get the chip quality you want. Morbark has done
extensive factory testing with this and you will get the same results by slowing down or speeding up the feed system.
What causes bad chip quality?
1� Dull knives are the biggest culprits of bad chip quality.
2� Improperly set or worn out anvils.
3� Poor maintenance, such as worn out holders, knives and anvils.
4� Rotten or poor quality of wood.
5� It is recommended that the customer get into a routine of changing their knives after every shift. They might still be able
to get more loads out of them, however, the benets are, they don’t have to take a lot off when sharpening their knives
allowing them to get more sharpenings and it will also save on fuel. The duller the knives the more horse power it takes
to cut.
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