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56 CLCH-IM-16A
Figure 49
Belt Tensioner
Proper belt tension is required to ensure maximum
bearing and drive component life and is based on fan
brake horsepower requirement. Use
Table 47
to find
the proper belt tension and refer to the inset for an
example. To use the table, you must know:
q Fan design brake horsepower (bhp) per belt (not
motor hp)
q Fan rpm
q Fan sheave pitch diameter, found by measuring
where the middle of the belt rides in the sheave
(See
Figure 47
)
q Type of belt cross-section (stamped on the belt)