[W126 Coupe] 1991 560 SEC Fuel Pump Replacement

[Dick Spellman]

Henry Viveiros wrote:

> Has any of you replaced the fuel pump on a 1991 560 SEC?

> 

> The replacement I have doesn’t seem exactly like the one on the car. The 

> new one has a metal fitting at the outlet end that looks like it is for 

> a push-on for a soft hose. The one on the car seems to have some sort of 

> metal tubing going from the rearmost pump  to the innermost fuel pump 

> and I don’t know how it connects to the pump.

> 

> It seems to be crimped or pressed into the old pump. Maybe the outgoing 

> line is just pulled out of the pump and pushed by hand onto the ”barbed” 

> outlet of the new pump.

> 

> I don’t want to try to remove the old pump until I understand how to 

> disconnect the fuel line from the old pump and then connect the line 

> onto the new pump.

> 

> The software I have on the computer shows that I have the correct pump 

> (# 003 091 53 01), but the way the outgoing line connects to the pump 

> seems different.

> 

> Does anyone have any comments?

> 

Henry
I have not done a 91 560SEC fuel pump package.

In all work I have done the fuel pump fuel connections were banjo to one 
side and a stubbed out threaded tube to the other.  The metal line goes 
to the stubbed out ends and requires (2) crush washers (seals) one to 
either side of where the metal line slips over the threaded stub on the 
pump.  Don't know if I am doing a solid job of describing the two types 
of fittings.  You may be able to use the fittings from the old fuel pump 
and then remove the nipple you refer to from the new pump.  If the pump 
permits the removal of the nipple, there will be a thin hex wrench 
fitting on the nipple near the fuel pump body.  If this is not the case, 
you need to check with the supplier of the pump for advise.

Good luck,

Dick