Eberspacher fuel line bleed

[choppy]

Greetings all,

Have an Error 52 fault (No start safety time exceeded No flame detected on start attempt) which occurred after diesel ran out.
Im thinking a bleed to the fuel pump is 1st thing - any experience or ideas on best way.

I'll probably try an oil removal pumps (basic online chandlery 8" long brass body) as pipes similar size after that

Thanks

 

[[70521]]

Remove fuel line on the heater side of the filter, place fuel line below the lowest point of the fuel tank. Gravity syphon action might start now or suck gently (don't swallow) to start the syphon action. When fuel fills the filter place gloved finger over fuel line and re-attach.

Start the priming sequence on the heater and make note to self to keep the tank topped up.

 

[Plum]

Greetings all,

Have an Error 52 fault (No start safety time exceeded No flame detected on start attempt) which occurred after diesel ran out.
Im thinking a bleed to the fuel pump is 1st thing - any experience or ideas on best way.

I'll probably try an oil removal pumps (basic online chandlery 8" long brass body) as pipes similar size after that

Thanks

When my fuel line to the Eberspacher has been drained it does not fire up next time. So if that happens I let it shut down, wait a minute, restart and it then works perfectly on all subsequent starts. I believe you will have more problems getting the air out if the pickup pipe and fuel line from the tank has a larger bore than specified by Eberspacher (Max 2mm bore on my D2)

 

[Ian_Edwards]

Or fit a priming bulb on the input of the filter.
All the diesel cars I had, had a priming bulb hidden somewhere under the bonnet.
Just loosen a connection somewhere near the heat and squeeze the bulb until the fuel flows air free.

 

[NormanS]

When I had an Eber, and faced with this very slight problem, I slackened the connection at the pump, and with a dinghy pump put a slight pressure on the tank. When fuel appeared at the slackened connection at the pump, I tightened it up. Obviously, in order to achieve the slight pressure required, the breather has to be temporarily blocked.
Now I have a Chinaspacher, and it has a "fuel" button to press to bring fuel up to the pump, when first installed. More importantly, it has a remote switch, which I can keep under my pillow, so that I can switch on the heating before getting up.

 

[LittleSister]

You say the diesel ran out, so the challenge is simply to refill the fuel line between the tank and the heater. As I understand it, the Eberspacher pump simply pumps a tiny amount each time it is pulsed by the controller applying voltage to it briefly. The controller will assume the fuel line is already full and give just a few pulses to the pulses to provide the correct amount of fuel for starting. Once it fires it will pump repeatedly (you can usually hear it clicking) to provide the appropriate amount of fuel for running.

You should be able to refill the fuel line using the heater's own pump (avoiding the sucking etc. mentioned in previous posts) the following manner:
1) disconnect fuel line at the pump, and secure it such that it remains (as it should be installed) with a continuous rise in height towards the pump end of the pipe, to avoid air collecting along its length
2) unless it is obvious by the colour or layout of the wiring, establish which is the negative and which is the 'power' (pulsed positive) terminals of the pumps as follows
- disconnect the two wires going to the heater fuel pump, noting which connects to which terminal, and use a multimeter or whatever to determine which is the negative (i.e. is connected to the boat's common ground)
- reconnect the negative to its previous terminal
- disconnect or leave disconnected the power (pulsed positive) wire to the pump
3) connect a temporary 'wander lead' wire to your battery positive (ideally fused, but I leave that to your discretion) long enough to reach the heater pump
- repeatedly tap the positive wander wire on the power (non-negative) terminal of the pump - you should hear the pump clicking as it pumps every time you connect tap the wire
- keep tapping until fuel appears at the heater end (will take a lot of taps!)
- reconnect the fuel line to the pump
- reconnect the power (pulsed positive) wire from the controller to the pump terminal
- now restart the heater as normal. It is likely to take several attempts as you have still to fill within the pump from the reconnected pipe to the burner.
- disconnect your wander lead from the battery.

 

[lustyd]

unless it is obvious by the colour or layout of the wiring, establish which is the negative and which is the 'power' (pulsed positive) terminals of the pumps as follows

Eber pumps reverse polarity to pump, so there isn't a + or -.

Since several posts mention filters, by default there is only a tiny filter in the inlet to the pump on an Eberspacher. Some may have added third party filters, but that's not the default setup.

 

[choppy]

Thats great thanks for all the suggestions much appreciated