NPK M20C, Instruction Manual, Page: 64 / 152

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GENERAL MAINTENANCE
M20K, M28K, M38K JAW MAINTENANCE
The following information is to be used as a general guide for maintaining the K Jaw
and cutter blades on the NPK M Series Processor. Failure to maintain the jaws and
cutter blades will result in poor performance, and eventual failure to the jaws and cutter
blades. These failures are not covered under the standard NPK warranty.
Use care when handling the blades.
Do not
over grind the cutter blades.
Do not
weld on the cutter blades.
During normal use of a processor, the jaws and cutter blades will become worn.
Regular maintenance must be performed to ensure that the maximum efficiency is
realized.
DAILY MAINTENANCE
 Grease the two arm pins and center pivot area two times per shift using an EP#2
grease (15 pumps of grease) .
 Check the jaw weldment for cracks. Contact NPK at 1-800-225-4379 for repair
procedure, if a crack is found.
 Inspect for loose, broken, and missing fasteners. Replace and re-torque as
required. See
“FASTENER TORQUES”
.
 Check the condition of the cutting blades. If the edge is rounded and dull, grind the
edges back to 90°. Rotate the blades if extreme wear or chipping on the cutting
edge is noted. If the blades are replaced or rotated, they must be shimmed. Blades
should be shimmed from .005” (0.127 mm) to a maximum of .010” (0.254 mm) .
Replace the blades if they are cracked.
 See “BLADE MAINTENANCE AND ADJUSTMENT” for piercing tip and blade
maintenance.