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ROUTINE MAINTENANCE
DRUM WEAR:
What causes drum wear?
1� Again dull knives are the biggest culprit and will make the operator
force feed the machine, which can cause wear all the way around the
drum.
2� Force feeding can cause the material to ride against the drum all the
time causing more pressure and wear on the drum it also takes more
horse power and fuel to operate. With a large horsepower machine
even though the knives are dull the machine will still want to feed at
the same rate, which can also be considered force feeding.
3� Excessive contaminations such as dirt and sand are abrasive and can
cause premature wear. It is always recommended to clean your
material as much as possible before chipping it.
What should I do if the drum wears to the point it has worn welds
down?
1� You can V the seams out where the welds have worn down around the
pockets and re-weld them with a low hydrogen rod.
NOTE: You need to insure you keep track of how much welding rod you use
on one pocket then use the same amount on the pocket 180° across from it.
This will help keep the drum balanced.
2� Should you nd wear on each side of the back of the pockets normally
caused from force-feeding as (shown below in picture #1). You should
weld some diagonal strips as (shown below in picture 2) to prevent
future wear and also use as an indicator that it needs re-welded when
worn down.
straight edge
1
2
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