
Installation
Agitator Agitator
Agitator
Toreducetheriskofreandexplosion,always
maintainaminimumof1in.(25.4mm)clearance
betweentherotatingagitatorpartsandthe
containertopreventsparksfromcontact.
•Ifinstallinganewagitatorontoanewtank,follow
steps1–2,and7–15(models25C536,25C537,
25C538).
•Ifreplacinganestablishedagitator,followsteps
1,3–12,and14–15(models25C539,25C540,
25C541).
1.Relievepressurefromthesystem(if
applicable)byfollowingtheprocedureinthe
PressureReliefProcedure,page11,andremove
thepressuretankcoverfromthetank.
2.Unscrewandremovethehexjamnut(49),plug
(P),ando-ring(R)fromthetankcover.
3.RemovetheupperU-bolt(56).
4.Loosenthetwoagitatorpaddlesetscrews(46)
andremovetheagitatorpaddle(45).
5.On10and15gallontanks,removethelower
U-bolt(56),loosenscrews(54),andslidethe
bafe(53)offtheuidtube(12).
6.Unscrewandremovethehexjamnut(49),
gasket(50),andagitatorfromthetankcover.
7.Toinstallthenewagitator,placethegasket(50)
ontopofthetankcovercenterhole.Insertthe
agitatorshaft(47)throughthegasketandcenter
hole.
NOTE:Positiontheairmotorandregulatoras
showninTypicalSystem,page5.
8.Installthejamnut(49)belowthetankcover,
andtightenrmlytoassureasealbetweenthe
gasket(50)andtankcover.
9.Installtheshaftsupport(44)ontotheshaft
housing(42).
10.ClampwithupperU-bolt(56),clamp(43),lock
washer(41),andnut(55).
TightentheU-boltatapositionleaving
approximately0.015in.(0.006mm)clearance
gapbetweenthethrustwasherandthetopof
theshaftsupport.
11.Onthe10and15gallontanks,placethelower
bearingassembly(66)and(67)ontheshaft.
12.Onthe5gallontank,clampthelowerU-bolt
directlytotheshaftsupport(44)(seebelow).
Slidethebafe(53)overtheuidtube(12)and
positionthebafeabout1/2in.(13mm)above
thehighestpointontheagitatorpaddle(45).
ClampinplacewiththelowerU-bolt(56),washer
(41),andnut(55).
Misalignmentbetweentheshaftanduidtube
maycausetheagitatorshafttobindwhen
clampingtheU-bolt(56)inplace.Loosenif
requiredtoallowshaftrotation.Theagitator
motorshouldrunat20psig(1.4bar)airpressure
whendry.
13.Aligntheagitatorpaddle(45)ontheagitator
shaft(47)asfollows:
•For10and15gallontanks:Alignthetopofthe
paddlehubwiththelowermarkontheagitator
shaft.
•For5gallontanks:Ifa5gallonpailistobe
placedinsidethepressuretank,alignthetop
ofthepaddlehubwiththeuppermarkonthe
agitatorshaft.Ifapailisnottobeplacedinside
thetank,alignthetopofthehubwiththelower
markontheagitatorshaft.Afterthepaddleis
properlyaligned,applylowstrengthsealantto
thetwosetscrews(46)andrmlysecurethe
paddle.
14.Removetheplugorexistingelbowfromtheair
inletmanifold(5).Installthenewelbow(69)into
thepressuretankairinletmanifold.
15.Connecttheswivelendoftheairhose(70)to
theelbow(69).
3A4797B7