Anyone know how to re-seat the barrel in the injection pump after I mistakenly lifted it up from the pump.

I am finding out there is a "pin" that comes from the side wall of the pump that locks the barrel in the right position to the plunger. When the barrel is inserted in the incorrect position, the pin is pushed out in the pump and in most cases the barrel is seating in the wrong position compared to the plunger when you are just randomly inserting it after taking it out.

I am also finding the pin is accessed from the side of the pump. there is a opening under the shut off valve and above the fuel pump on the injection pump, metal door with about 6 screws. and the pin can be accessed when that metal door is opened.

Sounds like the guys at the SuperTurboDiesel forums would have good idea about this, as they are modding the IP all the time. I tried to create an account there but can not get the activation email even after 3-4 days now. Any one have an account there or contacts there?

If you are familiar with this IP, can you confirm my findings about how to correct the barrel again or share any info you think can help me?

My car is 1998 300TD USA model. work is being done at the moment in south of Boston.

Thanks,
Sam

I do not know how to do this myself. If you get no usable reponses on your thread. You might try talking to a pump repair place.

I have no ideal if that pin is easily mallable or not. Suspect you would not want to bend it though. If it is a case of positioning the barrell so the pin can either go in by itself or be manually inserted into the hole. A wooden dowel sanded down or some simular material that might help maniputating the barrell into its proper position if hard to do otherwise may be needed. I would think any material much softer than the barrell would do no harm. Using no force at all to speak of is obvious.

Thank you for reply.

I am trying to avoid taking the Injection Pump out. My local Indy wants over $1000 for taking the pump out and back in. Then I have to take it to Bosch, which will cost another $600-$800. Mercedes quotes replacing the pump for around $2000 with MB rebuild pump....

I spoke with a couple of MB indy who work on this pumps and they said there is a groove on the barrel where the pin should lock and according to them, it should do it. So, my first goal is to see if doing that fixes my issues, if not, I may get the MB to change the pump.

The Alignment Pins are supposed to be pressed into the Housing.

Just take a Sharpie type Felt Marker and draw a line on the Barrel that line up with the Groove on the Barrel and do the same on the top of the Barre.
Als draw a line on the Housing where the where the Pin is and carefully insert the Barrel.

When you put the Delivery valve, sring and the Delivery Valve Holder in turn the Delivery Valve Holder down by hand and compare how high it is compared to the others that are installe correctly before you Torque it down.

In on pic the Pin is circled. If you have trouble locating the Barrel over the Plunger turn the Fuel Injecton Pump Camshaft and raise the Plunger so it is higher.
Before inserting the Barrel drip some Diesel Fuel on the Plunger or spray on some WD-40 so the Barrel does not get stuck on the Plunger.

You can see the Solt on the Barrel of the next Pic.

The M Pump is for a 617

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84 300D, 82 Volvo 244Gl Diesel

Thanks Diesel911.

I have 98 E300TD. Does it have M-W pump?

That pin is exactly what I am talking about. Do you think I got it right, to adjust the pin from side of the pump? If you have a picture of what it will look like when I open that metal plate? I have never done it so, just want to get better idea and prepare before hand. also my view will not be that great with the pump in the car with shut off valve blocking view etc...

Someone recommended not to remove the shut off valve from the pump, he said that will cause lot of work...but said to remove the fuel pump if need be. are they easy steps?

Also, The whole thing started with me mistakenly lifting the barrel out of the pump. and the pump not working correctly after that for obvious reasons...that is, the barrel did not get aligned correctly with the plunger when I put it back in. I think when I lock that pin again to the barrel, the barrel and plunger will be back in correct position. Any further calibration needed after that or the pump will be running as it run before I started to change the ORings....

Thanks,

Diesel911.
I also just read your response here.

http://www.peachparts.com/shopforum/diesel-discussion/317678-replaced-delivery-valve-seals-w124-300d.html

Do you know which PUMPS 98 E300 Turbo US models have? the Bosch part number is 0 400 196 033.

I think I need to push in the pin you pointed out on that thread. What kind of force they would take? very smooth, smooth, or little hammer ticking?

The Pic I posted is from a M type (not an MW type) Fuel Injection Pump.

To the bese of My knowlege if you need the special splined Socket to take the Delivery Valve Holders off you have an M Pump.

Also MW Type Pumps do not have the O-rings on the Delivery Vavle Holders.

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84 300D, 82 Volvo 244Gl Diesel

bbnn

I am not sure what you did with the Pin or Pins on your Pump because they are not supposed to be moved.
I also have done no reading on the superturbodiesel forum about the Pins.

I do know that if you put the Element Barrel in wrong and Torque it it is possible to cause some damage.
If you did that and it caused the Pin to be pushed out that likely saved it from damage.
However, get a good light ald look at the end of the Pin to see if it was deformed.

In the Pic the position of the Pins is circled. Note this is a 6 cylinder Pump of a Pic I copied from one of our Members.

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84 300D, 82 Volvo 244Gl Diesel