Trane QFNA-IOM-1 Fan User Manual


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Link-BeltSeries6800Spherical
RollerBearingPillowBlocks
1. Usejackscrewsinthedowel
pin6holestodisassemble
baseandcap.Donotuseapry
orwedgeatthesplittime.
2. Boltbasetobearingsupports,
squarewiththeshaft.Drawup
basemountingboltssnuglybut
nottofinaltightness.
3. Shaftmustbecleanandfreeof
burrsandnicks.Applymixture
ofwhiteleadandoiltoshaft,
outsideofdiameterand
threadsoftaperedsleeveand
faceoflocknut.
4. Slidesteelrings,bearing,
adapterandaccessoryparts
ontheshaftinthecorrect
order.SeeFigure15.The
bearingistobesetupasa
fixedbearingonthedrive
5. Setthebearingandsleeve
snuglyontheshaftatthe
positionofthebearingsupport.
Thebearingistobeplaced
withthebearingfaceopposite
thelocknutagainstthebearing
housingshoulder.Thelocknut
isonthesheavesidebearing.
Inplacingthisbearing,take
intoaccountthattightening
correctlywillmovethebearing
furtherupthetaperedsleeve.
Donottightenlocknutbeyond
fingertightatthistime.
6. Theshaftwithbearing
assemblymaybeloweredinto
housing.Lowerslowlyand
positionbearingsandsealsto
engagebearinghousingbase.
Ifbearingouterringsbecome
misaligned,donotforceback
intopositioninstead,carefully
workbackbyturningand
sliding
7. Bearingsmustbemountedto
achievetherequiredclearance
removal.
a. Measuretheinitialbuilt-in
bearingclearanceacrossthe
toprollersandouterring
racewayasshowninFigure
16.Asnugfeelis
recommended.Itmustbe
possibletoremovetheshimby
pullingitstraightout.
b. Tightenthelocknutforcingthe
bearingupthetaperedODof
thesleeveuntilthebearing
measuredclearanceis
reducedbytheamountshown
inTable12.
8. Thepropermethodof
tighteningisshowninFigures
17and18.Usingaspanner
wrench,tightenthelocknut
untilsnug.Holdtheadapter
sleevefromturninguntilseated
firmly.Usingabrassbarand
hammer,drivethefaceofthe
locknutasshowntorelievethe
threadpressure.Retightenthe
locknutandrepeatuntilthe
correctadjustmentspecifiedin
Step7isobtained.
9.
Bendatangofthelockwasher
downintooneofthelocknut
slots.Usetheslotwhichis
mostnearlylinedupwiththe
tang.Insert“C”spacerinfixed
bearinghousing,onthelock
nutside.
10.Lubricatebeforeoperationby
packingthebearingfulland
fillingthereservoironboth
sidesofthebearinguptothe
bottomoftheshaft.Grease
shouldbeforcedinonesideof
thebearinguntilitcomesout
theothersidealltheway
around.Greaserecom-
mendationsaregiveninthe
“Maintenance”section.See
Table9.
11.Applynon-hardeninggasket
compoundtocapsurfaces
whichcontactthebase.
Tightencapnutsorbolts
securely.
12.Withthemountingboltssnug,
checkalignmentandfreedom
ofrotation.Thehousingor
shaftclearancewiththeseals
issmallandcanbechecked
visuallyforuniformityallthe
wayaround.Alignbyshimming
orshiftingasnecessary.Use
largeareashimstoavoid
distortingthehousingand
pinchingthebearing.Finally,
tightenmountingbolts
securely.SeeTable13for
torques.
QFNA-IOM-1 27
BearingService
Table12-BearingClearanceReductiononLink-Belt6800SeriesBearings
PillowBlock
Range
BoreSize
(Inches)
ReductionofClearance
(Inches)
Min. Max.
6823-6828 1-7/16-1-3/4 0.0010 0.0015
6829-6844 1-13/16-2-3/4 0.0010 0.0020
6845-6868 2-13/16-4-1/4 0.0015 0.0025
6869-6892 4-5/16-5-3/4 0.0020 0.0030
6893-68104 5-13/16-6-1/2 0.0025 0.0035
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