AR14.40-W-2038B | Remove/install NOx sensor with controller unit | 22.3.11 |
ENGINES 457.9 in MODEL 940, 942, 943, 944 with CODE (MS4) BlueTec 4
ENGINES 457.9 in MODEL 940, 942, 943, 944 with CODE (MS5) BlueTec 5
W14.40-1389-09
1 Electrical connection
2 Electrical line
(NOx controller unit to NOx sensor)
3 Muffler
(with reduction catalytic converter)
A113 Ox sensor with controller unit
A113a1 NOx sensor controller unit
A113b1 NOx sensor
4 Bracket
5 Bolt
6 Electrical line
(NOx controller unit to separation point)
| Remove/install | ||
| Notes on self-locking nuts and bolts | ||
1 | Switch off ignition | ||
2 | Remove NOx sensor controller unit (A113a1) at holder (4) | The NOx sensor controller unit (A113a1) and NOx sensor (A113b1) create a unit and can only be removed together. | |
The NOx sensor controller unit (A113a1) must also be removed first otherwise the electrical line (2) could be damaged by twisting when removing the NOx sensor (A113b1). | |||
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3 | Disconnect electrical line (6) at electrical connection (1) and detach electrical line (2) out of brackets | ||
4 | Remove NOx sensor (A113b1) | Only place tool on hexagon since the component is very sensitive and can be easily destroyed. | |
Installation: Coat thread on NOx sensor (A113b1) with paste. | |||
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5 | Install in the reverse order |
Exhaust aftertreatment
Number | Designation | Engine | |||
BA14.40-N-1042-02B | NOx sensor on muffler | Nm | 50 | ||
BA14.40-N-1043-02B | NOx sensor controller unit on holder | Nm | 12 | ||
Repair materials
Number | Designation | Order number |
BR00.45-Z-1005-06A | Paste, hot lubrication 1 kg, DB supply specification 6879.20 | A 000 989 76 51 |