15
4.5Noise
twisttheScrew
adjusttheaxialpositionof
Underpropwheel
change Tubshaft
changePulleySpring
changeMotorsupportor
changeMotor
changeImpellerinstall
Impelleragain
changeBearingblock
installDrain‐hoseandthe
Overflow‐tubeinpipecatch
Checkthesourceofvoice
WhethertheScrewwhich
YES
YES
YES
YES
connecttoTubwrapandlifter
is
loose,causetheScrewand
theSideplates
NO
WhethertheUnderpropwheel
NO
WhethertheTubshaftis
breakoff
NO
WhetherthePulleySpringis
invalidation
NO
WhethertheMotorsupport
installMotorsupportagain
NO
WhethertheMotorfriction
oroscillationistoobig
NO
WhethertheImpellerwas
brokeorbrokeoff
NO
Whetherthe
Bearingblock
theTub shaft
NO
WhethertheDrain hoseand
theOverflow tube‐chafethe
Side‐board
YES
YES
YES
YES
YES
4Troubleshooting