VARILITE VL4 Manual page 125

Figure 3-26. Tilt Mechanism Adjustment Screw Setting
02.9628.0010
7-Oct-97
CAUTION: It is essential that tilt mechanism belt be adjusted correctly.
Overtightening belt can cause high failure rate.
Step 13. Adjust belt tension.
a. Tighten belt adjustment screw and then check tension of
belt (Figure 3-26).
PULLEY
PULLEY SIDE RAIL
GOOD:
GAP EXISTS BETWEEN
BEARING AND HOLE
DRIVEVW
b. Turn head so that pulleys rotate back and forth. At same
time, slowly tighten adjustment screw until both tension and
feed sides of belt are taut (no deflections).
Step 14. Complete tilt mechanism replacement by doing Steps 2 thru 11
in reverse.
C 3. M
HAPTER
FEED SIDE OF BELT
BELT MUST BE TAUT
(NO DEFLECTIONS)
TENSION SIDE OF BELT
REAR COVER
BEARING
HOLE
TOO TIGHT:
BEARING IS FLUSH
AGAINST HOLE
P
AINTENANCE ROCEDURES
DRIVE PULLEY
TOO LOOSE:
BEARING IS FLUSH
AGAINST HOLE
3-79
CONFIDENTIAL