Author Topic: Fuel injection system for M130  (Read 2576 times)

samisabsabi

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Fuel injection system for M130
« on: January 03, 2019, 20:46:39 »
Hi every body! 
I found that the adjustment section in  my mechanical injection pump is full of oil, ( in other words : the flyweights are rotating inside the oil) is that normal ?
Please advice!!!

Pawel66

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Re: Fuel injection system for M130
« Reply #1 on: January 03, 2019, 21:02:22 »
Sami, I am keeping my fingers crossed that they do!
But what is the vote about??

On a serious note, you may want to study this: https://www.sl113.org/wiki/Fuel/Injection

You will see - earlier FIPs had own oil supply, later ones were using engine oil. Important is oil/fuel separation in governer section vs. pump section (where the levers and cams/flyweights are vs. where the pistons are).
« Last Edit: January 03, 2019, 21:22:43 by Pawel66 »
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

MikeL43

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Re: Fuel injection system for M130
« Reply #2 on: January 08, 2019, 17:36:13 »
I had a similar problem with the injector pump on my 67 250 SL which has a separate oil reservoir.  It got so bad that oil was being blown out of the IP vent.  The extra oil in the IP caused the weights spinning inside the pump to slow down causing a very over rich condition which would cause the car to stall if left at idle for very long.  The guys on the forum gave me several ideas about what caused the extra oil in the IP including a failure of the seal between the engine oil and the IP causing oil from the engine to seep into the IP from the engine.  I took the IP out and sent it to Jerry Fairchild Industries in California where it is currently undergoing a rebuild.  Unfortunately the fix is not cheap as the rebuild will be around $800 and the mechanics work about the same.  Good luck! 

samisabsabi

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Re: Fuel injection system for M130
« Reply #3 on: January 08, 2019, 17:47:55 »
Thank you Mikel, I appreciate your comment which is helpfull for me.

ja17

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Re: Fuel injection system for M130
« Reply #4 on: January 09, 2019, 08:10:45 »
Only the M127 and M129 engines have the IP with separate oil supply and a dip stick to check the level. The latter injection pumps on the M130 engine had engine oil circulate through them. The oil level in the IP of these later pumps stayed constant.  Any excess would flow back into the engine. I believe that the R18 IP was the last version used with the self contained oil supply and dip stick for oil level.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Shvegel

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Re: Fuel injection system for M130
« Reply #5 on: January 19, 2019, 01:36:00 »
There is no seal between the pump section and the governor.  The oil level in an engine fed pump is about 3/4" above the mainshaft center line.  You might have to download this and blow it up to see it but if you look at the left end of the shaft you will see an open bearing and if you look at the govenor housing you will see no seal.  The oil level is regulated by the height of the drain hole in the front cover in the lower left corner of the picture.  See the 5th hole that has an odd placement?  picture the 2 holes on either side of it being level across the top of the shaft.  oil will drain from the pump at about 1/2" (13mm) above the top of the shaft.
« Last Edit: January 19, 2019, 02:40:48 by Shvegel »