Case 621G - Urea Quality Sensor (UQS) - Replace

7-MAINTENANCE
UreaQualitySensor(UQS)-Replace
CAUTION
Flyingdebris!
Compressedaircanpropeldirt,rust,etc.intotheair.Weareyeandfaceprotectionwhenusingcom-
pressedair.
Failuretocomplycouldresultinminorormoderateinjury.
C0049A
Prioroperation:
Keepallnon-authorizedpersonnelclearofthearea.Parkthemachineonarm,levelsurfaceinneutralwiththe
parkingbrakeapplied.Lowerthebucket/attachmenttotheground.Turnofftheengine.Installthetransport/service
linkintothelockedposition.
1.TurnthetimeddisconnectswitchtotheOFFposition.
RCPH11WHL653BAU1
2.RemovetheaccesscoverbelowtheDEF/ADBLUE®
tanktogainaccesstotheUreaQualitySensor(UQS).
NOTE:usecompressedairandwatertocleandebrisfrom
arounddrainplugarea.
NOTE:theureaqualitysensoronthebottomoftheDEF/
ADBLUE®tankcanberemovedtodrainuidasneces-
sary.Whenremovingtheureaqualitysensor,itisrec-
ommendedthattheelectricalharnessshouldnotbedis-
connectedfromtheureaqualitysensor.Theureaquality
sensorshouldbecleanedbyushingwithdeionizedwater
beforere-installation.Notethatthesensorshouldnotbe
submergedwhilecleaningsothatwaterdoesnotenterthe
ventlocatedonthebottomofthesensor.Alsonotethatif
theharnesswasdisconnectedfromthesensor,theelec-
tricalpinsmustbecleanedwithelectricalcontactcleaner
anddriedbeforetheharnessisreconnectedtothesensor.
LEIL17WHL1583AB2
7-131