Trane QFNA-IOM-1 Fan User Manual


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Link-BeltP-300Bearings
SeeFigure14
1. Shaftmustbecleanandfreeof
nicks,burrsandrust.Ifbearingis
beingreplaced,becertainshaftis
straightandround.
2. Lubricatetheshaftandbearing
bore.Becertainsetscrewsare
clearofbore.
3. Slidebearingonshaftwith
setscrewsfacingtowarddrive.Ifit
isnecessarytotaporpressunit
ontheshaft,useahardwood
blockorsoftmetalbaragainstthe
endoftheinnerring.Donotstrike
orexertpressureonhousingor
seals.
4. Bolthousingsecurelytosupport.
SeeTable11forbolttorques.
Aftervisuallycheckingalignment,
tightensetscrewstothetorque
valuesgiveninTable11.
5. Rotateshaftbyhandtocheck
freedomofrotation.Anycondition
ofstrain,irregularrotational
torque,abnormalsoundor
vibrationmaybeduetoimproper
alignment,improperlocation,bent
shaft,etc.Installationshouldbe
recheckedandcorrectionsmade
asrequired.
Note: Afterinstallingorreadjusting
bearings,wheelalignmentandtip
clearancesmustalwaysbe
rechecked.
26 QFNA-IOM-1
BearingService
Figure14—Link-BeltP-300Bearing
Setscrew
Diameter (Inches)
RecommendedTorque
InchLbs. FootLbs.
P-3271-11/16 3/8 325 27
P-3311-15/16 3/8 325 27
P-3352-3/16 7/16 460 38
P-3492-7/16 7/16 460 38
P-3432-11/16 1/2 680 57
P-3472-15/16 1/2 680 57
P-3553-7/16 5/8 1350 113
P-3593-11/16 5/8 1350 113
Table11—TorquesforTighteningSetscrewsonLink-BeltP300Bearings
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