Knife Cylinder Adjustment - Challenge CHAMPION 370 TC Instructions And Parts Manual

8.0 Maintenance Guide
To adjust:
1. Lower the knife bar in Knife Adjust Mode.
2. DISCONNECT THE POWER AND LOCK IT OUT! (See Power Lockout procedure, page 5.)
3. Loosen all (8) jam nuts on the gib adjusting screws and back the screws out 1/2 turn.
4. Adjust lower (4) screws until snug - not tight to eliminate the air gap between the knife bar
and gib. While holding the adjusting screws tighten those (4) jam nuts.
5. Unlock and reconnect the power to the machine, then raise the knife bar.
6. DISCONNECT THE POWER AND LOCK IT OUT! (See Power Lockout procedure, page 5.)
7. Adjust the upper (4) screws the same way the lower (4) were adjusted. Tighten the jam nuts.
8. Turn the power back on and cycle the knife several times. Recheck the gibs (repeat steps 1-7
as necessary).
9. Don't over-tighten the gibs; this can score the knife bar.
10. If the knife bar and gets scored, remove only the burrs by scraping and then sanding smooth.
Deep scores need not be removed.

8.7.8 Knife Cylinder Adjustment

The cylinder shaft is threaded into the clevis to adjust the position of the knife bar. When properly
adjusted, the distance from the bottom of the knife bar, to the table with the knife bar in the down
position should measure 1" (25.4 mm), (Figure 31).
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