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21
Maintenance
Belt Tensioning
The belts are adjusted by means of a hinged base with tensioning bolts
accessible through the access panel/fan guards. Check tension frequently
during the first 24-48 hours of run-in operation. To properly adjust the
belt tension, position the fan motor so that moderate pressure on the belt
midway between the sheaves will produce a
1
⁄2" deflection. Overtensioning
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
®
V-BeltTensionTesterisanalternate
methodfortensioningV-belts.Checkwithyoulocalbeltsupplier.
Sheave Alignment
• Themotorsheaveistobepositionedascloseaspossibletothemotor
in order to minimize torque on the motor bushings.
• Themotorandfansheavesmayhavegroovesthatarenotused.The
bottom surface of the motor and fan sheaves must be aligned within
3mm of each other and level within
1
⁄2°(3mmin300mm)inorderto
not adversely affect belt and sheave life.
• Alignmentcanbeachievedbyplacingastraightedgeacrossthetop
of the sheaves making sure that it is level and measuring down to the
bottom surface of both sheaves at four points.
• Thebeltislocatedintheinboardsetofgroovesclosesttothebearing.
Fluid Cooler Maintenance
Some maintenance procedures may require maintenance personnel to
enter the fluid cooler.
The purchaser or owner is responsible for providing a safe method
forenteringorexitingtheaccessdoor.
Warning
Bushing Fastener Torque N·m
SD
1
⁄4
-
20 8
SK
5
⁄16
-
18 18
SF
3
⁄8
-
16 30
E
1
⁄2
-
13 48
Bushing Fastener
Torque Values
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