NPK M20C, Instruction Manual, Page: 68 / 152

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68
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GENERAL MAINTENANCE
K JAW BLADE MAINTENANCE AND ADJUSTMENT
Each cutting blade and the tunnel blade can be turned four times. The guide blade can
only be turned twice. The piercing tip is a weld-in style and can be built up via a weld
procedure (see
“PIERCING TIP MAINTENANCE AND REPLACEMENT”
). The
piercing tip can also be replaced (see
“REPLACING PIERCING TIP”
).
When replacing or turning cutting blades, the following steps must be followed to
achieve accurate blade shimming and final blade clearance.
STEP 1:
Start with the male jaw (BD) which contains the primary blades. These blades should
be installed first. Prior to installing, the male jaw blade pocket (DM) needs to be free
from debris and raised edges. Clean pockets and remove any raised edges from the
pockets using a grinder (t1).
If existing blades (BG) are being turned, the face must also be free of scars. Remove
the scars using a grinder (t1).