PRG Best Boy 4000 Service Manual page 101

CAUTION: Do not overtighten belt, pulley will break and/or bearings will fail.
To set belt tension manually:
Step 1. Orient head as shown in Figure 3-60.
Step 2. Manually move the luminaire head back and forth (tilt) or around (pan), noting the tension created on one
side of belt and deflections on the other.
Step 3. Using wrench, tighten belt adjustment bolt(s) until no bilateral deflection occurs.
.
TILT MECHANISM
J2 J7
J6
J9
J12
J11
J14
J13
PAN MECHANISM
Feed Side
of Belt
J4
J5
J8
J10
J15
Drive Pulley
Figure 3-60: Belt Tension Adjustment
Orient head as shown
Driven Pulley
Tension Side
of Belt
Deflections are present
when belt is loose.
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BEST BOY 4000 SPOT LUMINAIRE FIELD SERVICE MANUAL
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