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Removing and installing pump for reducing agentV437 > < Removing and installing active tank for reducing agent

A4 Mk3

Pump for reducing agentV437 - exploded view
   
Pump for reducing agent -V437- - exploded view
1 - Active tank
q   For reducing agent
2 - Return line
q   With heater
  WARNING
Safety risk due to escaping reducing agent.
Observe safety measures for handling reducing agent → Chapter.
3 - Bolt
q   2 Nm
4 - Electrical wire
q   Version depends on country
5 - Pump for reducing agent -V437-
q   With heater for reducing-agent pump -Z103-
q   With pressure sender for reducing agent metering system -G686-
q   Removing and installing pump for reducing agent -V437- → Chapter
q   Removing and installing pressure sender for reducing agent metering system -G686- → Chapter
q   Tightening torque for pressure sender for reducing agent metering system -G686- version 1 → Fig.
q   Tightening torque pressure sender for reducing agent metering system -G686- version 2 → Fig.
6 - Supply line
q   With heater
  WARNING
Safety risk due to escaping reducing agent.
Observe safety measures for handling reducing agent → Chapter.
7 - Metering line
q   From pump for reducing agent -V437- to injector for reducing agent -N474-
q   With heater
q   Clip onto fuel tank
  WARNING
Safety risk due to escaping reducing agent.
To prevent large amounts of reducing agent from escaping when the metering line is opened, wait until the reducing agent has been drawn back automatically → Anchor.

   
Pressure sender for reducing agent metering system -G686- version 1 - tightening torque
–  Tighten pressure sender for reducing agent metering system -G686--item 2- to 8 Nm.
  A26-11193
Pressure sender for reducing agent metering system -G686- version 2 - tightening torque
–  Tighten bolts -2, 4- to 1.5 Nm.
  A26-11194

Removing and installing pump for reducing agentV437 > < Removing and installing active tank for reducing agent