Lead Screw Adjustment Nuts - Challenge CHAMPION 370 TC Instructions And Parts Manual

1. DISCONNECT THE POWER AND LOCK IT OUT! (See Power Lockout Procedure, page 5.)
2. Remove the drive belt cover guard at the rear of the table.
3. Loosen the four socket head screws holding the motor to the mounting plate.
4. Slide the motor down to put more tension on the belt, or lift it up to reduce tension for
removing belt.
5. If belt cannot be tightened, replace with a new belt.
6. Adjust the tension of the belt so that there is a 1/2"-3/4" (10mm) flex remaining and tighten
the mounting plate socket screws.
7. Replace the belt guard cover. Unlock and reconnect the power to the machine.

8.7.4 Lead Screw Adjustment Nuts

If play is noted in the forward pillow block and thrust bearings, take up the play in the adjustment nuts
by:
1. DISCONNECT THE POWER AND LOCK IT OUT! (See Power Lockout procedure, page 5.)
2. Remove the drive belt cover guard at the rear of the table.
3. Loosening the lead screw jam nuts, (Figure 27).
4. Snug up the inner nut to eliminate any play.
5. Tighten the nuts against each other.
6. Check the socket head bolts in the pillow block to make sure they are also tight.
7. Replace the belt guard cover. Unlock and reconnect the power to the machine.
8. Check the accuracy; it may need to be reset.
Figure 27 – Jam Nut Location
8.0 Maintenance Guide
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