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Figure 16: Inspection of Knives
6-5 Removing and Replacing Bed Knives
NOTE: This procedure should be performed by a qualified
operator / maintenance mechanic. Protective gloves must be
worn to avoid injury when handling the cutting knives.
To remove and replace bed knives, complete the following
procedure:
1. Open the granulator by following Steps 1-5 in Section 6-3.
2. Open the rear-closing panel by releasing the locking latch.
3. Pivot the in-feed hopper completely back to gain clear access
to the cutting chamber, and clear any process material or
foreign objects from between the knives.
4. Rotate the rotor so that the rotor knives will not interfere with
the removal of the bed knife. Using a wooden block, block the
rotor to prevent it from rotating while removing the knives.
5. Loosen the lock nuts and back off the adjustment screws. (See
Figure 16.)
6. Loosen and remove the bed knife bolts and lift the upper
shield, positioned above the knife, removing it from the cutting
chamber. The bed knife may now be removed.
7. Perform the above steps to remove the rear (upstroke) bed
knife as well.
NOTE: Before replacing the bed knife with new or sharpened
knives, wipe the knife seats on the knife block, being sure to
clean off all process material. The tapped holes in the knife
block (used for holding the knives in place) should be clear of
any dirt, oil, or process material.
Rotor Knife
Locking Bolts
Bed Knife Locking
Bolts
Bed Knife
Adjusting Screws