L.B. White 350 Premier - Manual (Page 16)

1. The tensioner automatically applies proper tightness
to the belt during operation, and eliminates the need
for manually retightening the belt after service.
2. When replacing the belt, and during routine
maintenance, ensure tensioner is positioned as
shown in Fig. 13 after belt removal.
FIG. 13
15
BELT TENSIONER
TENSIONER PARALLEL
TO DIAGONAL SUPPORT
1. Remove belt from pulleys. See Belt Replacement.
2. Loosen set screw on fan and motor pulleys. See Fig.
14 for typical set screw location.
3. Remove pulleys and keys from fan shaft and motor.
FIG. 14
SET SCREW
SHAFT KEY
FAN AND MOTOR PULLEYS
FAN DRIVE COMPONENTS TROUBLESHOOTING
Refer to the following table to identify basic problems,
causes and cures associated with V-Belt drive systems.
PROBLEM CAUSE SOLUTION
Belt sslips Pulleys worn Replace pulleys
(Belts bottoming out
in grooves)
Oil or grease on belt Clean pulleys or
belt.
Belt B Breaks Improper belt Belt pried over
installation pulleys using
sharp or pointed
tools. Install new
belt properly.
Improper belt Ensure belt
tension. tensioner is
positioned
properly.
PROBLEM CAUSE SOLUTION
Belt JJumps Drive misaligned Check and realign
Sheave Dirt entering pulleys Remove belt,
Grooves clean the pulleys
Belt hitting belt guard Realign guard
(check for loose
or missing guard
screws)
Belt Dirt or grease on Remove dirt or
Cracking belt or aged belt replace belt.
Belt w wearing Belt hitting belt guard Realign guard
rapidly (check for loose
or missing guard
screws)
Worn pulleys Replace pulleys
Dirt in pulleys Remove dirt