Farmi Forest Corporation VALBY CH 222, Operation, Maintenance And Spare Parts Manual

Page: 19 / 32

LUBRICATING AND MAIN---
TENANCE INSTRUCTIONS
CH 222 CHIPPER
www.normet.fi
03294030
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9.KNIVES AND ANVIL
9.1.BEFORE SERVICING THE KNIVES
Danger !
ROTATING KNIVES
Don’t risk cutting injury or
being struck by high
speed particles.
Wait for all movement to
stop before reaching inside the feed chute.
Failure to follow safety precautions could result
in serious personal injury or death.
D
Turn the tractor off.
D
Open the upper housing bolts M10 (32). Turn
the upper housing to the side.
D
Lock the disk with lock bolt (18).
D
Remove or turn the feed chute to the side.
D
Use protective gloves when handling the kni--
ves.
9.2.SHARPENING THE KNIVES
You will notice the need to sharpen the knives
when:
-- Trees do not self--feed well.
-- The power requirement is increased.
-- The smoothness of the chip surface is decrea--
sed.
Keep the knives with their original pairs. That way
the knives will be worn equally and the disk stays
in balance.
D
Remove the 3 locknuts M12 (3.5) behind the
knife frame.
Fig.9. Remove the knife fastening bolts.
D
Remove the knife--fastening bolts M12 (3.3,
they are threaded through the disk. Turn the
wrench so that your knuckles will not touch the
knife if the wrench slips.
30
o
Fig.10. 30 degree angle.
D
Sharpen the knives at a 30 degree angle.
Caution !
Use gloves when removing or han-
dling the knives, Turn the wrench so
that your knuckles will not touch the
knife if the wrench slips.
Avoid getting the knife hot when sharpening.
Sharpen both of the knives the same amount.
Certain corn choppers use the same style of knife
as the Valby Chipper (Papec for example).
Automatic grinders to service this style of knife
can thus be found at some implement dealers. Of
course, grinders to service chipper knives are
available from grinder and knife manufacturers.
D
Fasten the knife and tighten the bolts to 50 foot
pounds.
D
Adjust anvil clearance if needed.
9.3.SHARPENING THE ANVIL
If you notice wear or rounding of the inner edge of
the anvil, sharpen the anvil so that the original
angles are retained.