Fuel Supply Line: Service and Repair

13 53 540 - Replacing, sealing fuel hoses





Warning!
The fuel in the fuel lines is under pressure (approx. 3-5 bar)!





Recycling
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.





Version with hose clamps:
Release hose clamps.
Remove hoses (1) and (2).

Installation:
Fuel hoses and hose clamps must be replaced each time they are removed!





Version with compressed air connection:
Blow fuel back into tank with a short blast of compressed air (max. 3 bar) at compressed air connection (1).





Version, fuel hoses without integrated unlocking facility:
Unlock fuel hoses with special tool 16 1 050 and detach hoses.

Installation:
Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.
Coat O-ring for assembly with anti-friction agent.





Version, fuel hoses with integrated unlocking facility:
Press fuel hose (1) downwards and keep pressed.





Press unlocking ring (2) upwards, keep pressed and detach fuel hose (1).

Installation:
Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.
Coat O-ring for assembly with anti-friction agent.





M43, M44:
Cars with screw-mounted fuel feed line (2):
Follow installation instructions (1) and (2).

Installation instruction 1:
Always replace fuel hose (1) and hose clamps once they have been removed.





M43, M44:

Installation instruction 2:
Always replace O-ring. Coat O-ring with anti-friction agent.
Clean sealing faces of fuel feed line.
If necessary, replace fuel feed line.
Tightening Torque,
refer to Technical Data 13 53 4AZ.





Seal off fuel hoses:
Fuel hoses with hose clamps:
Seal hoses with special tool 13 3 010.

Installation:
Fuel hoses and hose clamps must be replaced each time they are removed!





Fuel hoses with quick-release couplings:
Seal fuel hoses (1) with special tool 13 5 281.
Seal fuel lines (2) with special tool 13 5 282.

Installation:
Check O-ring in fuel hose and sealing surfaces on fuel lines for damage; replace components if necessary.
Coat O-ring for assembly with anti-friction agent.