Chinese heater pumps for eberspachers

[pcatterall]

I see lots of parts being sold on ebay as 'for Eberspacher/Webasto' heaters, these include fuel pumps.
I have bought and tested several of these, some have worked the heaters but their dosage rate has been well out of spec for the heaters so they will not burn well and may coke up the heaters or worse.
Just be advised!!

 

[Graham376]

Are these adjustable, as with the genuine Eber ones?

 

[pcatterall]

Are these adjustable, as with the genuine Eber ones?

Sorry ? not sure how the Eber pumps are adjusted?

 

[pvb]

Are these adjustable, as with the genuine Eber ones?

The Eberspacher pumps are not adjustable!

 

[Graham376]

The Eberspacher pumps are not adjustable!

Can't lay my hands on the manual but seem to remember the pump delivery rate is adjusted via the nuts on one end, think it adjusts the ball valve tension.

 

[peteK]

The fuel rate is adjusted by the pulse rate which you set the controller to achieve.

 

[guardian]

The genuine one on my sprinters block heater wasn't adjustable, i replaced it with a ten quid chinese copy over a year ago after being quoted £90 for a replacement and alls well.

 

[Graham376]

The Eberspacher pumps are not adjustable!

The manual for one Eberspacher I installed commented in the installation instructions to avoid turning the nuts on one end of the pump as it would alter the fuel flow.

There's some info here - https://www.letonkinoisvarnish.co.uk/eberspacher_fuel_1.html

It may be possible to adjust the pump by slightly altering the ball valve spring tension. One method is to adjust the small nuts, make sure they are secure so cannot undo with vibration.
Any change will require several fuel volume tests. The adjustment range is limited. Do not expect a 3.1 - 5 kW pump to adjust to match lower heat pump versions.

More info here - https://www.letonkinoisvarnish.co.uk/eberspacher_fuel_2.html

 

[pvb]

The manual for one Eberspacher I installed commented in the installation instructions to avoid turning the nuts on one end of the pump as it would alter the fuel flow.

There's some info here - https://www.letonkinoisvarnish.co.uk/eberspacher_fuel_1.html

It may be possible to adjust the pump by slightly altering the ball valve spring tension. One method is to adjust the small nuts, make sure they are secure so cannot undo with vibration.
Any change will require several fuel volume tests. The adjustment range is limited. Do not expect a 3.1 - 5 kW pump to adjust to match lower heat pump versions.

More info here - https://www.letonkinoisvarnish.co.uk/eberspacher_fuel_2.html

That's just a bodge; the pumps are not designed to be user-adjustable.