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Removing and installing fuel tank with attached components > < Fuel tank with attached components - exploded view

A3 Mk1

Draining fuel tank
Draining fuel tank
Special tools and workshop equipment required
   
t  Fuel extractor -VAS 5190-
t  Hose with outer Ø of 11 ... 15 mm
Procedure
Observe safety precautions → Chapter.
Observe rules for cleanliness → Chapter.
  Caution
To prevent damage to the electronic components when disconnecting the battery:
Observe notes on procedure for disconnecting the battery.
–  Disconnect battery → Rep. Gr.27.
  W00-1107
A - Procedure if fuel tank is more than 3/4 full:
  Caution
Secure earth wire of fuel extractor unit -VAS 5190- to a bare metal part on the body.
–  Detach tapered adapter -2- from shaft end -1- of fuel extractor -VAS 5190-.
–  Use insulating tape to mark the extraction hose -arrow- at a distance of -a- = 1,415 mm from the end of the hose.
  A20-0703
–  Remove filler cap from fuel filler neck.
–  Screw shaft end -1- of fuel extractor -VAS 5190- onto fuel filler neck.
  Note
A ball valve is located at the bottom of the filler neck in the fuel tank; it must not be overpressed or damaged by the extraction hose. Therefore, only push the hose in as far as the marking -arrow-.
–  Push extraction hose into fuel tank until marking on hose -arrow- coincides with shaft end.
  Note
  A20-0698
t  The procedure when using a fuel extractor without a shaft end is fundamentally the same.
t  A ball valve -2- is located at the bottom of the filler neck in the fuel tank -1-; it must not be overpressed or damaged by the extraction hose -3-. Therefore, only push the hose in as far as the marking -arrow-.
t  In this case, make a mark -arrow- on the extraction hose at distance -a- = 1,350 mm from the end of the hose using insulating tape. The extraction hose has been properly inserted when the affixed mark is level with the edge of the filler neck.
t  If hose is difficult to insert, apply a thin coat of engine oil. DO NOT use silicone-based lubricant.
–  Drain fuel tank as much as possible through fuel filler neck.
–  Carefully remove extraction hose.
–  Remove fuel delivery unit → Chapter.
–  Extract remaining fuel from right chamber of fuel tank through opening for fuel delivery unit.
–  Push hose into left chamber of fuel tank and extract remaining fuel.
–  Re-install fuel delivery unit → Anchor; observe instructions for connecting battery.
B - Procedure if fuel tank is less than 3/4 full:
–  Remove fuel delivery unit → Chapter.
–  Extract fuel from right chamber of fuel tank through opening for fuel delivery unit.
–  Push hose into left chamber of fuel tank and extract remaining fuel.
–  Re-install fuel delivery unit → Anchor; observe instructions for connecting battery.
  A20-0386

Removing and installing fuel tank with attached components > < Fuel tank with attached components - exploded view