Rep 4.2 Knife Replacement - Challenge CMT-130TC Service Manual

REP 4.2 Knife Replacement

WARNING
Changing knives can be very dangerous un-
less safety precautions are observed and ex-
treme care is taken when handling knives.
Keep handling of unprotected knives to an
absolute minimum. Have the scabbard
nearby and insert knife immediately. Warn
people of any unprotected knife.
WARNING
Knife changing is a ONE PERSON OPERA-
TION! More than one person changing a
knife creates safety hazards.
WARNING
Even used knives are extremely sharp! Use
extreme care when handling new, re-ground,
and used knives.
WARNING
Disconnect and lockout power as described
in the Power Lockout Procedure on page ix.
Initial Actions
Locate a stable cart or table approximately 36"
tall, the knife lifter, the T-handle hex wrench, an
empty scabbard, and a sharp knife (Figure 4-4).
CMT-130TC Book Trimmer
Figure 4-4. Knife Replacement Supplies
Knife Removal Procedure
1. Switch the main power OFF and lockout
power to the machine.
2. Move the waste bin aside and open the rear
door.
3. Place an empty scabbard on a nearby, sta-
ble surface.
4. Using the T-handle hex wrench, remove the
two knife bolts that are in open slots in the
knife bar (Figure 4-5). They are the second
and sixth bolts from either end of the knife.
Set the bolts aside and save for knife instal-
lation.
Figure 4-5. Knife Bolt Locations
MAY 2019
4-3
5. Place the knife lifter in position, aligning
each lifter handle with the holes from which
the two knife bolts were removed in the pre-
vious step. Turn the handles clockwise until
the lifter is securely fastened to the knife bar
(Figure 4-6).
Figure 4-6. Knife Lifter
6. Use the T-handle wrench to remove the re-
maining (5) knife bolts. Save the bolts with
the two previously removed.
WARNING
Make certain to have a scabbard on the cart,
prepared to receive a knife. The screws
should be removed from the scabbard. The
protecting edge of the scabbard should be
facing the person changing the knife when
placing the knife in it. Make sure the cart is
nearby. Do not carry the knife across ob-
structed or slippery floors. Warn people
nearby that a knife is being removed.
7. Slowly turn the knife lifter handles counter-
clockwise only until the knife is released
4. Repair/Adjustment Procedures