Removing and installing injector for reduction agent N474 — VW

Removing and installing
injector for reduction agent
N474
WARNING
Danger of skin irritation due to reducing agent.
Do not allow reducing agent to come into contact with skin or eyes! Always wear protective gloves and safety goggles.
If reducing agent gets onto the skin, wash with soap and water.
If reducing agent gets into the eyes, rinse with water for several minutes.
Do not breathe in or swallow reducing agent!
If you have swallowed reducing agent, rinse out your mouth, drink a lot of water and immediately go to the medical office or inform a doctor.
Caution
Observe safety precautions when working on the SCR system
Chapter
.
Observe rules for cleanliness when working on the SCR system
Chapter
.
Note
To keep the following description as short as possible, the
“NO
x
reduction agent AUS 32”
(AdBlue
®
) will be referred to as "reduction agent".
Removing:
Caution
Immediately seal all open lines and connections using suitable plugs to prevent ingress of dirt. The smallest particle of dirt can cause extensive damage to the system.
Protect disconnected connectors against wetting from reducing agent by suitable means, e.g. a plastic bag and cable ties. Electrical connections may be damaged due to the high penetration ability along with subsequent crystallisation of the reducing agent.
Push hydraulic connection of delivery line
1
as far as stop onto
injector for reducing agent
N474
4
; then press securing clips
arrow
, and pull off connection. Seal open connections to prevent ingress of dirt.
Release and disconnect connector
2
.
Remove clamp
3
, and remove
injector for reducing agent
N474
4
.
Installing:
Installation is carried out in the reverse order. When installing, note the following:
Connect
injector for reducing agent
N474
4
with new sealing washer to SCR catalytic converter observing lugs (electrical connector
2
faces upwards).
Place new securing clamp
3
over connection, and press it until it engages. The
injector for reducing agent
N474
is then fixed in position.
Start securing clamp bolt
3
, and tighten it to 5 Nm
Chapter
.
First, fit and engage connector
2
.
Then, fit and engage hydraulic connector of delivery line
1
.