Emptying fuel tank, all-wheel drive - engine code CFHC, CFHF, CLCA, CUUB, CUUC, CUUD, CUUE, CUUF — VW

Emptying fuel tank, all-wheel drive - engine code CFHC, CFHF, CLCA, CUUB, CUUC, CUUD, CUUE, CUUF
Emptying fuel tank when fuel pump is intact
Anchor
.
Emptying fuel tank if defective pump is more than
3
/
4
full
Anchor
Emptying fuel tank if defective pump is less than
3
/
4
full
Anchor
Emptying fuel tank when fuel pump is intact
Special tools and workshop equipment required
Fuel extractor
VAS 5190
Adapter for fuel extraction
VAS 5190 /3
Vehicle diagnosis, testing and information system
VAS 5051B
Procedure
WARNING
Fuel supply line is pressurised. Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
Note
Supplementary fuel pump
V393
not fitted on all engine types.
Remove fuel supply line
2
Chapter
“
Separating plug-in connectors
”
.
Connect
fuel extractor
VAS 5190
with
adapter for fuel extractor
VAS 5190 /3
to fuel supply line.
If fitted, separate connector
A
to
supplementary fuel pump
V393
.
Switch ignition on.
Remove cap from fuel filler neck.
Connect
vehicle diagnostic tester
and perform guided function
“Draining fuel system”
.
Note
The fuel pumps are now actuated. The
vehicle diagnostic tester
shows the progress of the drainage.
Open shut-off tap on
fuel extractor
VAS 5190
until fuel tank is emptied.
When the fuel tank is empty, stop the function to prevent the fuel pump from running
»dry«
.
Emptying fuel tank if pump is defective and fuel tank is more than
3
/
4
full
Special tools and workshop equipment required
Fuel extractor
VAS 5190
Adapter for fuel extraction
VAS 5190/3
Caution
Secure earth wire of
fuel extractor
VAS 5190
to a bare metal part of the body.
Remove cone piece
2
from shaft
1
of
fuel extractor
VAS 5190
.
Make a mark
arrow
on hose with insulating tape at distance
a
= 1700 mm from end of extraction hose.
Open tank flap.
Remove cap from fuel filler neck.
A ball valve
2
is located at the bottom of the filler neck in the fuel tank
1
; it must not be damaged by the extraction hose
3
. Therefore push hose into filler neck only as far as marking
arrow
.
Screw shaft
1
of
fuel extractor
VAS 5190
onto fuel tank filler neck.
Push extraction hose into fuel tank until marking on hose
arrow
coincides with shaft end.
Drain fuel tank as far as possible.
Pull extraction hose out carefully.
Note
When no more fuel is extracted, the tank is emptied just enough for the sender flange to be opened without danger.
If fuel tank has to be drained fully, proceed as follows
Anchor
.
Emptying fuel tank if pump is defective and fuel tank is less than
3
/
4
full
Special tools and workshop equipment required
Torque wrench (40... 200 Nm)
V.A.G 1332
Fuel extractor
VAS 5190
Adapter for fuel extraction
VAS 5190/3
WARNING
Fuel tank must not be more than
1
/
4
full.
Fuel supply line is pressurised. Wear eye protection and protective clothing to avoid eye injuries and skin contact. Before loosening hose connections, wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.
Lower fuel tank
Chapter
“
Removing and installing fuel tank, four-wheel drive
”
Release connector
arrow
and pull it off flange
1
.
Disconnect fuel lines
1
and
2
on flange. Separate plug-in connectors
Chapter
“
Separating plug-in connectors
”
.
If fitted, remove fuel line
3
leading to
metering pump
V54
for auxiliary heater from sealing flange.
Open locking ring using
wrench
T10202
.
Carefully lift flange of fuel delivery unit.
Insert suction hose of
fuel extractor
VAS 5190
as far as possible into fuel tank. Extract fuel.
Note
In order to extract the remaining fuel from the 2nd chamber, the fuel tank has to be lowered and
fuel gauge sender 2
G169
lifted up
Chapter
.
If fuel tank only needs to be drained, install sender flange again.