Emptying reducing agent tank (platform van and chassis) — VW

Emptying reducing agent tank (platform van and chassis)
Special tools and workshop equipment required
Vacuum box
VAS 6557
Note
To keep the following description as short as possible the
“NO
x
reducing agent AUS 32”
(AdBlue
®
) is just called a reducing agent.
WARNING
The reducing agent can irritate skin, eyes and respiratory organs.
After skin contact with this agent, wash immediately with plenty of water.
If necessary seek advice from a doctor.
Note
Tank for reducing agent is emptied via filler neck.
Reducing agent tank fill volume is about 28 litres.
Caution
Always ensure that no reducing agent contacts clothing or bodywork.
If this occurs, wash out reducing agent using clear water and a lint-free cotton cloth.
If the reducing agent has already crystallised, use warm water and a sponge.
Reducing agent that has not been removed will crystallise and damage the surface after some time.
For information on storage and disposal see
Service net → Environment → Workshop disposal
! Request country specific information concerning storage and disposal from importer.
Lift attachment of cap
1
slightly and turn it anticlockwise so that indentations
2
are exposed.
Insert special wrench from toolkit
3
into indentations and unscrew cap.
Prepare
vacuum box
VAS 6557
as follows:
Close shut-off taps
A
,
B
and
C
.
Connect coupling
D
with connection to shut-off tap
A
and pressurise compressed air hose with compressed air.
Open shut-off tap
A
.
A vacuum is established in
vacuum box
VAS 6557
.
Close shut-off valve
A
as soon as the pressure gauge registers a pressure of 0.8 bar.
Disconnect coupling
D
from connection on shut-off tap
A
and interrupt compressed air supply at compressed air hose.
Guide end of hose
E
into filler neck as far as base of reducing agent tank and open shut-off tap
B
.
Note
The reducing agent is then drawn from the tank and into the
vacuum box
VAS 6557
by the vacuum. The capacity of the
vacuum box
VAS 6557
is 11 litres. The extracted volume is sufficient for removal of the reducing agent tank. If the reducing agent tank holds a greater amount and the tank is to be emptied, then repeat the process.
To empty
vacuum box
VAS 6557
, hold connection on shut-off tap
C
over suitable container and open shut-off taps
A
and
C
.
Caution
Never reuse extracted reducing agent. For information on storage and disposal see
Service net → Environment → Workshop disposal
! Request country specific information concerning storage and disposal from importer.
Flush out
vacuum box
VAS 6557
carefully using water when work sequence is complete.