wanted 606 turbo lift pump and I need to know how does it work with the IP?

[Olivier]

First, as anyone has a spare lift pump for a E300 Turbo diesel?
I think might be failing, trouble to get high revs, after 3000 RPM it studder... Lack of powr omn take off.

Second, how does the pump work? I thought the big block with the DV was the pump? Now I am told the lift pump, the teeny thing attached to the side of the delivery valve block is actually the pump?
Its confusing to me.
What does the large block with the DV and what does the lift pump?
Thank you.
Olivier

 

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Not Good

"O",

The larger Block with the Delivery valves is the INJECTION Pump.
(Takes the clean fuel (Secondary FF),delivered under pressure, from the Lift Pump and SUPER pressurizes it in a timed sequence to each individual Injector.

The Wee Little Pump on the side of the Injection Pump is the LIFT Pump
which draws fuel from the Tank and pushes it through the Secondary Fuel Filter to the Injection Pump.

How Clean are your Fuel Filters?
How clean is your fuel tank "Sock"/strainer?
I'm thinking/hoping FUNGUS.

Pictures in a sec

 

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I.P. and Lift pump

Big Device center stage is the Injection Pump.
Little Device on the side of the I.P. ,just above the number 5 is the Lift Pump.

IF your problem is the L.P. as you suspect,there may be repair parts available
for it.

Some of the Guys over here have discovered that if the Pressure relief valve
on the I.P. has a weak spring the I.P. can suffer from fuel starvation.
The pressure relief valve is on the engine side of the I.P. and has one of the
fuel lines leading back to the return.It's basically a "Banjo Bolt" (Hollow)
loaded with a tiny ball bearing that's spring loaded.

Fuel pressure relief valve adjustment - PeachParts Mercedes ShopForum.

[I hate that I'm suspicious of your Fuel,"E300 TD 1997 on WVO",BUT that's always my first thought
when I see one being run on WVO/VO]

Are we still talking the same symptoms as here(?):
run some aTF to clean the ip, car sluggish then not reving under load...Long story - PeachParts Mercedes ShopForum

I suggest dropnosky's idea in reply #82 to isolate whether the problem is fuel delivery or engine [pump(s)] related.

Howeveah,If it turns out to be your Lift pump:

 

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Over flow valve

In the pictogram the fuel pressure relief valve is number 125.

It's a real Booger to get to ,seeing as how it's mounted on the engine side of the I.P.
If I were going to play with it,I'd stuff some Red or Blue rags into the cavity between the I.P
and the Engine Block underneath the Banjo Bolt to catch it or the "Seal Rings".
(ANYTHING that is unfortunate enough to fall into that abyss,may be gone forever.)

 

[Olivier]

Gosh, Sorry for the late late late reply Compress Ignite.
Thank you for all the info, great
You are right, its related the the peachpart topic.
I had a play today, got into bothers too...
The banjo is not acting properly, its really weak as it open with a minimal mouth blow, but I don't know what is the opening pressure and what a mouth blow provide?
Othere bother is that it doesn't shut all the time. Its a Non Return valve from wat I gather, but its not properlly funcionning. Like it doesn't lock when I suck into it soemtimes?
It could be the whole failure itself?
Thank you for all the info.
Brilliant knowledge.
Olivier

 

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The "Overflow" valve (As both MB and Bosch style it)

Releases excess fuel pressure inside the Injection Pump over a certain set
value.
(Maybe...somewhere between 15-19 PSI...'Memory fails and the Post on P.P.
and the FSM have the exact figures)
If the spring that provides the pressure to the Ball inside the "Banjo Bolt" is
weak Fuel Pressure is Bled Off unnecessarily/before the I.P.'s barrels are
filled for proper Injection Sequence.(I.E. Fuel Starvation of the I.P.)

There's a whole bunch of guys that can take credit for discovering this "Weakness"
BUT,I'm not one of them.(Just a Messenger)

There are Two Part numbers for All things Bosch in Mercedes:
1.The Bosch Part Number (Which is necessary for ordering parts from Bosch.)
2.The Mercedes (Assigned) Part Number (WHICH only applies @ Dealer related databases)

I noticed that one of the guys in Atlanta,Ordered
(what is to Mercedes,an "Unobtanium" Part: I.E. the Spring for his "Overflow" valve.)
from The Local Bosch Service Center the correct part, using the BOSCH part number.

 

[Olivier]

The bother about the Banjo is that its sealed. The spring cannot be replaced.
I checked with the diesel shop that got me the lift pump kit and he couldn't find the banjo with bosch and think it could be dealer only. There is no part number on the banjo and the only part I can get is the MB part, and the shop doesn't recognise it.
Defenitly the spring is really weak...
All the best.
Olivier

 

[spock500]

Those valves are not cheap from MB, I bought one thinking I might need it on the reburb but mine was ok.

MB said it was 'special', in fact so 'special' they wouldn't take it back

CI, how's it going bro, almost a year now with the C250D going strong (famous last words )

 

[Olivier]

Hi David,
What valve was dear? Was it from the lift pump or the banjo?
I am now looking for the banjo.
I nearly rebuild the lift pump at 13 pounds cost. Not too dear, a new lift pump is 110.. EEK!
But the non return banjo from the return line is what I need now...
Anyone has one?
Cheers.
Olivier

 

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"Overflow Valve" (Mercedes speak for Non-return)

Spock,

Happy to hear it!

Oliver,

The NR Valve is a Bosch part, If you can't get a Large Diesel Truck Bosch
Injector/Pump shop to cross reference it there...I'll call the Bosch shop here and see if they can come up with a Bosch Part Number,then you can get it
from any Bosch Injection shop (It may take a day or two longer,but it'll be
cheaper,I believe.)

 

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Only 30 minutes to EDIT posts???

If Bosch can't supply it:
601 070 0646: OVER-FLOW VALVE for Mercedes

(Whoo, that's what $75.94 in USD) (Well that's only if Bosch GB doesn't have one)

 

[spock500]

Oliver, yup the valves (no 125) are the expensive bit, from memory about £40 which are sold separate from the banjo bolt.

You don't need to change the banjo though as it's only a bolt, no parts to it plus I think it's shrunk fit to the nylon clear pipe.

 

[Olivier]

If Bosch can't supply it:
601 070 0646: OVER-FLOW VALVE for Mercedes

(Whoo, that's what $75.94 in USD) (Well that's only if Bosch GB doesn't have one)

Compress ignite, Cannot see the picture?
Can you do it again? Please, pretty please
If I got a reference the diesel shop here would get it
Thank you.
I can get it here at the dealer for 40 quids. Wot a rip off...

 

[Olivier]

David,
I thought the banjo was the bolt called a "banjo bolt"?
What is the banjo is the round thingy that goes around?
If tho, yes it come with the pipe.
And yes the bother might be my valve... And other things...

 

[Olivier]

this look like mine,

its a different number from mb tho, I think... But it does look like mine.
I'll call the shop see what they say.
The pressure is very little, no? 0.5 bar, to 1 bar

 

[spock500]

This is the part I bought is on the left;

Just checked part numbers and they are the same for the OM605/6, I will have a look later to see if I can find it.

 

[Olivier]

Hi David.
Thank you.
I have just ordered it from the diesel shop as I need to get this asap and it might be the right one?
15 pounds. Bleemey! Better then 40 tho
But if it doesn't fit and you have a spare one, I'll be happy to get it.

Olivier

 

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O.k.

I called the Bosch Diesel center in Atlanta,and the MB part Number I pulled off the EPC doesn't cross over to a Bosch #(We don't know if this is because
maybe the Bosch part #s are different in the U.K.,or I pulled the wrong#)

Oliver and Spock,

There is a Metal I.D. Tag on the side of the Injection Pump that has BOTH
the MB part number (For the complete Injection Pump) AND the Bosch part
Number (For the complete Injection Pump).
To correctly order any parts for that I.P. or it's accessories (From Bosch)you
need that Bosch I.P. Part number from the Metal tag.

Good Luck!

(There's no picture on the MBspecialists site,just a description)

 

[Olivier]

Hi CI,
this is what is not showing:

I'll look at the tag later. Just drained the battery as the SOV was empt yand there is more tubing lengh, all this made it too hard for the L/P to suck it all... Not good...

 

[Olivier]

how about this part number .
see picture