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7 - MAINTENANCE
Urea Quality Sensor (UQS) - Replace
CAUTION
Flying debris!
Compressed air can propel dirt, rust, etc. into the air. Wear eye and face protection when using com-
pressed air.
Failure to comply could result in minor or moderate injury.
C0049A
Prior operation:
Keep all non-authorized personnel clear of the area. Park the machine on a firm, level surface in neutral with the
parking brake applied. Lower the bucket/attachment to the ground. Turn off the engine. Install the transport/service
link into the locked position.
1. Turn the timed disconnect switch to the OFF position.
RCPH11WHL653BAU
1
2. Remove the access cover below the
DEF/A
D
B
LUE
®
tank to gain access to the Urea Quality Sensor (UQS).
NOTE:
use compressed air and water to clean debris from
around drain plug area.
NOTE:
the urea quality sensor on the bottom of the DEF/
ADBLUE® tank can be removed to drain fluid as neces-
sary. When removing the urea quality sensor, it is rec-
ommended that the electrical harness should not be dis-
connected from the urea quality sensor. The urea quality
sensor should be cleaned by flushing with deionized water
before re-installation. Note that the sensor should not be
submerged while cleaning so that water does not enter the
vent located on the bottom of the sensor. Also note that if
the harness was disconnected from the sensor, the elec-
trical pins must be cleaned with electrical contact cleaner
and dried before the harness is reconnected to the sensor.
LEIL17WHL1583AB
2
7-148
Summary of Contents for 721G Stage IV
Page 24: ...1 GENERAL INFORMATION Waste Handler WH configuration LEIL18WHL1118FB 3 721G 1 18 ...
Page 26: ...1 GENERAL INFORMATION LEIL17WHL2018FB 5 821G 1 20 ...
Page 29: ...1 GENERAL INFORMATION LEIL19WHL0584H 1 1 23 ...
Page 30: ...1 GENERAL INFORMATION 1 24 ...
Page 51: ...2 SAFETY INFORMATION Empty tool LEEN11T0024AA 20 2 21 ...
Page 84: ...2 SAFETY INFORMATION 2 54 ...
Page 162: ...3 CONTROLS AND INSTRUMENTS Inducement and validation re starts LEIL14WHL0394HA 2 3 78 ...
Page 163: ...3 CONTROLS AND INSTRUMENTS Validation re start procedure LEIL15WHL0608HA 3 3 79 ...
Page 189: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 7 4 15 ...
Page 191: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 9 4 17 ...
Page 193: ...4 OPERATING INSTRUCTIONS RCPH10WHL045BAH 12 4 19 ...
Page 208: ...4 OPERATING INSTRUCTIONS 4 34 ...
Page 222: ...5 TRANSPORT OPERATIONS 5 14 ...
Page 259: ...7 MAINTENANCE LEIL17WHL1665H 5 721G 7 21 ...
Page 260: ...7 MAINTENANCE LEIL17WHL1665H 6 821G 7 22 ...
Page 267: ...7 MAINTENANCE DEF AdBlue technical faults LEIL14WHL0392HA 4 7 29 ...
Page 291: ...7 MAINTENANCE LEIL18WHL1152AA 14 821G 7 53 ...
Page 300: ...7 MAINTENANCE LEIL15WHL1846AB 2 821G 7 62 ...
Page 313: ...7 MAINTENANCE LEIL18WHL1154FA 1 LEIL18WHL1155FA 2 7 75 ...
Page 360: ...7 MAINTENANCE 9 Re install all the covers guards and steps previously removed 7 122 ...
Page 417: ...7 MAINTENANCE Waste Handler WH models LEIL17WHL2020FA 2 7 179 ...
Page 436: ...8 SPECIFICATIONS 721G Loader Lift Arms Specifications LEIL16WHL0629FB 1 8 10 ...
Page 445: ...8 SPECIFICATIONS LEIL16WHL0629FB 4 8 19 ...
Page 461: ...8 SPECIFICATIONS LEIL16WHL0629FB 10 8 35 ...
Page 470: ...8 SPECIFICATIONS LEIL16WHL0629FB 13 8 44 ...
Page 480: ...8 SPECIFICATIONS 8 54 ...
Page 516: ...9 ACCESSORIES 9 36 ...
Page 520: ...Windows 3 86 Windshield washer fluid level Check 7 163 ...
Page 521: ......