SPX Cooling Technologies MH Fluid Cooler User Manual page 29

maintenance
See Figure 5 for MH Fluid Cooler models MHF7111 and MHF7113 with
belt drive option. The belts are adjusted by turning the threaded rod. Before
tightening or loosening the belt, the double nuts holding the motor support in
place must be loosened. There are two jam nuts at the end of the rod next to
the casing. Turn the nut closest to the end of the rod to tighten the belt. Turn
the other nut to loosen the belt. After achieving proper tension tighten the
double nuts located on the fan side of the motor support against the motor
support to maintain belt tension, then retighten the motor support nuts. Ideal
tension is the lowest tension at which the belt will not slip under peak load
conditions. Check tension frequently during the first 24-48 hours of run-in
operation. Over tensioning shortens belt and bearing life. Keep belts free from
foreign material which may cause slipping. Never apply belt dressing as this
will damage the belt and cause early failure. A Dodge
an alternate method for tensioning V-belts. Check with your local belt supplier.
New belts (operating less than 8 hours) should be tensioned to the maximum
value. Tension after this period should use no less than the minimum value. If
the belt span was measured in millimeters, then use the Newton force values.
If specific tensioning instructions are provided with your tensioning tool, those
instructions should be used instead.
Motor Sheave
diameter
85 - 110mm
112 - 145mm
147 - 220mm
® V-Belt Tension Tester is
Belt Tension
Used V-Belt New V-Belt
minimum maximum
22N
32N
38N
32N
47N
56N
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