Draining the Fuel Tank

Draining the fuel tank

Special tools:
999 5720 Wrench 999 5720 Wrench
999 5721 Adapter 999 5721 Adapter

Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.

Preparation
Disconnect the battery negative lead. See Battery, disconnecting Battery Disconnecting

Warning! RISK OF EXPLOSION! THE USE OF A FRESH AIR MASK IS RECOMMENDED.

Insert the heavy duty hose 1.3 meters into the fuel filler pipe, measured from the edge of the opening of the filler pipe.
Pump until air comes out.

(V70) Fold up both sides of the rear seat.
(S80, S60) Remove the seat cushion for the rear seat.
Remove the right side cushion. See Side cushion Side Cushion
Disconnect the connector at the hinge.

Remove:
- the mounting screw for the hinge
- the screw for the seatbelt end mounting.
Release the strap/straps of the folding mechanism for the seat belt buckle. (Hooked into place on the lower edge of the backrest).
Lift out the backrest.

Fold the carpet (1) out of the way.
Remove the insulation panel.
Cover the area (2) around the cover and between the doors with absorbent material.

Caution! Ensure that there is no risk of dirt getting into the tank.

Removing the fuel tank filler cap over the fuel tank units

Remove the covers (1.2) over the fuel tank units.
Disconnect the fuel tank unit connectors (3).
Remove the hoses from the fuel tank unit.

Draining the fuel tank

Special tools: 999 5720 Wrench 999 5720 Wrench
Clean the area around the fuel tank unit thoroughly.
Open the right fuel tank unit. Insert the heavy duty hose and suck out the remains from the bottom of the right-hand side of the fuel tank.
Connect hose 999 5721 Adapter 999 5721 Adapter to the heavy duty hose. Suck out the remains from the bottom of the fuel tank unit reservoir.

Carefully remove the overflow pipe from the reservoir.
Remove the thin hose (999 5721 Adapter 999 5721 Adapter ) from the heavy duty hose. Connect the thin hose to the overflow pipe. Use a hose clamp.
Pump until a lot of air comes out.
Open the left fuel tank unit. Insert the heavy duty hose and suck out the remains from the bottom of the left-hand side of the fuel tank.

Installation

Right fuel tank unit:
- Place the overflow pipe approximately half a centimeter to the left-hand side
- Grip the right fuel tank unit reservoir. Pinch the fuel tank unit reservoir so that the float is held in its lowest position
- Lower the reservoir carefully while rotating it backwards around the front-rear shaft on the float
- Install the overflow pipe on the reservoir.

Left fuel tank unit:
- Install a new O-ring. Lubricate the new O-ring using petroleum jelly
- Press the left fuel tank unit down so that the row of protruding cables runs along the car
- Check that the O-ring is not trapped
- Tighten the screw. Tighten to 60 Nm
- Wipe up any fuel spillage
- Position the wiring in the cut-out in the rubber ring.

Note! Check that the arrow on the cover is between the markings on the tank. If the arrow is outside the markings the fuel gauge sensor will give an incorrect value and the float may catch against the inner wall of the tank. If not: Slacken off the screw and adjust the position of the fuel tank unit. Tighten as above.

Right fuel tank unit, continued:
- Install a new O-ring. Lubricate the new O-ring using petroleum jelly
- Press the right fuel tank unit down so that the fuel line connectors are pointing forwards and to the right
- Check that the O-ring is not trapped
- Tighten the screw. Tighten to 60 Nm
- Install the hoses on the fuel tank unit
- Wipe up any fuel spillage
- Position the wiring in the cut-out in the rubber ring.

Install the cover over the fuel tank unit. Tighten the nuts.
Connect the wiring and the connectors.

Install:
- the backrest
- the mounting screw for the hinge. Tighten to 50 Nm
- the connector for the hinge
- the seat belt end mounting. Tighten to 48 Nm
- the side cushion.
(V70) Fold the seat cushion forward.
(S80, S60) Install the seat cushion.