AR47.10-P-4001E Draining and Filling Fuel Tank

Draining Fuel:

Pumping Out Fuel:

DANGER: Risk of explosion from ignition. Risk of poisoning from inhaling and swallowing fuel. Risk of injury as a result of fuel coming into contact with skin and eyes

- No fire, naked flame or smoking Pour fuels only into suitable and appropriately marked containers Wear protective clothing when handling fuel


1.1 Draining fuel
Fit cap (013) together with pressure hose, take off
Refer to Special Tools below

Unscrew drain valve screw plug, screw in
- Check O-ring, replace if necessary. When installing, ensure it is correctly seated.


CAUTION: When working on the fuel gauge sender, only drain the chamber on which work is being performed. When removing and installing fuel tank, drain both chambers.


Refer to Fuel Tank below

Screw drain hose (012) with shut-off cock into drain valve, unscrew


CAUTION: The drain hose must be touching the bottom of the safety tank to avoid static charging.


Refer to Special Tools below

If no fuel runs out, fuel tank must be pressurized to approx. 0.15 bar by a brief pressure surge
a Briefly blow into the pressure hose of the cap (013) with compressed air
b. Insert an air pump (e.g. ball pump) into the cap (013) of the pressure hose, pump two or three times and disconnect again immediately.

1.2 Pumping out fuel
Unscrew drain valve screw plug, screw in


CAUTION: Check O-ring, replace if necessary. When installing, ensure it is correctly seated.


Refer to Fuel Tank below

Screw drain hose (012) with shut-off cock into drain valve, unscrew


NOTE: When working on the fuel gauge sender, only drain the chamber on which work is being performed. When removing and installing fuel tank, drain both chambers.


Refer to Special Tools below

Connect suction pump to ground


CAUTION: Connect suction pump to ground in order to avoid electrostatic discharge


Connect drain hose (012) with shut-off cock to suction end of scavenger pump, lock
Refer To Commercially Available Tools (see Workshop Equipment Manual) below

Pump out fuel through drain valve into safety tank

Fuel Tank:

Special Tools:

Commercially Available Tools: