1963 Mercedes Benz 190DC Fintail. Bad fuel tank and leaks.

[Dyslexic Viking]

8 minutes ago, Nullzwei said:

Maybe the injector fitting use an olive under the top nut to create the seal. Like this... (hopefully olive translates appropriately from English to Norwegian)

 

 

https://www.darwendiesels.com/search?controller=search&orderby=position&orderway=desc&search_query=olives

It is possible so will look for it when I disassemble it. Thanks.

[somewhatfoolish]

The pipe ends appear to have conical fittings

On 9/24/2022 at 2:48 PM, Mally said:

Wrap the thread on the bolt with PTFE tape, keeping the tape away from the very end of the thread,

Also try a fibre washer instead of copper.

A sealant like Loctite 577 will plug the leak.

[Dyslexic Viking]

Had the leaking coupling checked today and found nothing clearly wrong but cleaned everything before putting it back together.

After this I tried to get out the bolt I put in where the oil leak is but this is difficult and is tight so gave up on this today. Then I started it and backed it out and let the engine run for 20 minutes and at the end at a slightly higher rpm.

And to my great surprise the oil leakage at the bolt seems to have stopped and the leakage at the coupling with the injector has also stopped, there is only a small drop there now which is almost not visible in the picture below. Marked with an arrow as usual.

But I wont  believe that these leaks have stopped until some time has passed without leaks. So now it's just a matter of getting the turn signal to work and I can drive it again. Will pick up the relay tomorrow.

[Dyslexic Viking]

Been to the post office now to pick up the relay for the turn signals, just hope it works and fits.

Also got 2 books in the post, one about the history and possibly more about these cars and the other about the importer Philipsons who had the Mercedes imports in Sweden and possibly some of or even the whole of Norway as well. My car was sold new through them, and the recon engine in my car also comes from them. So this should be an interesting read, I hope, but it's in Swedish so it's tiring to read.

And as I expected and hoped in the Swedish book, there are pictures of taxis and the first one here is probably very similar to how mine looked during its working life in the 1960s.

The picture below is from Sundsvall Sweden, where when this picture was taken in 1964, 30 of the city's 38 taxis were Mercedes Benz. And all these in the picture are the same 190D as mine.

So I look forward to reading these.

[Dyslexic Viking]

The new turn signal relay fits and works.

But one of the lamps would not cooperate so had to disassemble a bit of it and clean contacts. And these only have these big lights on top of the front wings as turn signals at the front.

And after that this light worked again and all the turn signals work on this car now.

[Dyslexic Viking]

So with working turn signals, I can finally drive this again. Then I drove it out of the garage and washed it. Then it was finally ready for a drive and was looking forward to a drive with this in fine autumn weather, but it didn't turn out that way.

I pulled out onto the road and started to accelerate and things are not right something is wrong very wrong. The engine has almost no power and after a while it managed to get up to 60 kmh but that is all it can do and this is on flat ground with the pedal buried in the floor. So I quickly turned around and drove back home and parked it in the garage again.

So something is wrong and I don't know what. These have many linkages from the gas pedal to the engine so it is possible that something is wrong here so I can't get full power. But if this is the case, then it should probably be able to handle higher speed but with a slower acceleration I think.

So there needs to be some troubleshooting and I would welcome any tips on what this could be. But realistically, there are only a maximum of 2 weeks left before this has to go into winter storage. So with troubleshooting and ordering parts, I don't have enough time to get this on the road again this year. So this is now in winter storage and unfortunately won't hit the road again until late April next year. So this was not the end of this season for this one that I had hoped for, but what can you do things like this happen.

[Scruffy Bodger]

Does it rev out properly with no load? If it does that might indicate a simple restriction of fuel somewhere? Maybe try and run it from a can in the engine bay?

[Dyslexic Viking]

6 minutes ago, Scruffy Bodger said:

Does it rev out properly with no load? If it does that might indicate a simple restriction of fuel somewhere? Maybe try and run it from a can in the engine bay?

I'm not entirely sure, but I've managed to increase the revs quite a bit. And the pre-filter is transparent and I can see that diesel flows through well. So I don't think lack of fuel can be the problem, but I could be wrong. But this is something I will check.

[artdjones]

Disconnect the throttle linkage from the lever on the fuel pump. Then see what the maximum travel of the fuel pump lever is. 

Reconnect the linkage and then get someone to press the accelerator to the floor, while you check that that moves the fuel pump lever to the maximum position.

[rusty_vw_man]

15 minutes ago, artdjones said:

Disconnect the throttle linkage from the lever on the fuel pump. Then see what the maximum travel of the fuel pump lever is. 

Reconnect the linkage and then get someone to press the accelerator to the floor, while you check that that moves the fuel pump lever to the maximum position.

This, but just to add that a strategically placed phone to video record the movement can get over the lack of an assistant! 

[Dyslexic Viking]

9 hours ago, artdjones said:

Disconnect the throttle linkage from the lever on the fuel pump. Then see what the maximum travel of the fuel pump lever is. 

Reconnect the linkage and then get someone to press the accelerator to the floor, while you check that that moves the fuel pump lever to the maximum position.

Thanks. This is a good idea to check so I will. The linkages are among the worst parts on the car now as all the ball joints are worn out so there is a lot of slack in them and they are about to fall apart. I have replaced the 2 worst ones and was planning to replace the rest this winter. This makes me think, the ball joints I replaced were for the flap on the air intake, so it is possible that something is wrong here as well. But it's strange that this has a kind of throttle flap in the air intake, I didn't think that mechanical diesels needed this?

[jonathan_dyane]

Are the brakes servo assisted? If so if they run on vacuum from the inlet manifold the flap is required to create the depression.

[Dyslexic Viking]

6 minutes ago, jonathan_dyane said:

Are the brakes servo assisted? If so if they run on vacuum from the inlet manifold the flap is required to create the depression.

No, they are not. Are non servo drumbrakes front and rear on this one.

And I think this one has a vacuum pump like most diesels but I'm not sure but in that case wouldn't what you're talking about not be necessary?

[hairnet]

will you be getting the smaller roundy hubcaps like in one of the pictures.........

the post above the indicators

[Dyslexic Viking]

7 hours ago, hairnet said:

will you be getting the smaller roundy hubcaps like in one of the pictures.........

the post above the indicators

I do not think so. The car originally had it, but I think the ones that are on now are better to look at and these wheels are 14 inches compared to the original 13 inches, which are more difficult to get tires for.

And I'm going to start writing a post now as I've done some troubleshooting on the car today and have found a lot of strange things and things that are wrong.

[Dyslexic Viking]

Had a bit of troubleshooting on this today and quickly discovered that the throttle on the diesel pump doesn't move as much as it should, so I took off the linkage and the throttle on the pump hardly moves an sticks and after moving this a lot in one direction it got completely stuck. The throttle on the pump is marked below and is not very easy to get to.

So since this is now really stuck, there was no other choice but to remove the rearmost part of the diesel pump where this system is. And when it came off, it was clear why it was stuck and not working as it should.

So after disassembling this and cleaning it thoroughly, I put it back together and greased it up. And now this works perfectly again.

Then I took a picture inside the diesel pump as it is impossible to see inside there. And noticed something very strange has marked with an arrow.

And this strange thing was this

a piece of a hose. How did this get into the diesel pump? I really wonder how this is possible. And I never cease to be amazed at what you can find on old vehicles.

But there is a  problem I have discovered in all this and I desperately need help with this, so I hope someone can help and it will be a bit technical. I will make a separate post on that here.

[hairnet]

hvor mye til larvik m9?

corolla har navnet mitt på

 

 

[DSdriver]

When the Sabb (not Saab) engine in my sailing boat was not revving properly under load I took the governor to the local truck specialist for them to service. Half an hour later I had it back and my problems were solved. It was money very well spent

[Dyslexic Viking]

I have then discovered a problem after that in the post above that I desperately need others to look at and think about.

But first how the linkage to the throttle work when the throttle pedal is pused down. And this I have marked with arrows below.

So the throttle lever on the diesel pump must go up to increase the throttle and I have marked this with a red arrow below on the throttle part that came from the diesel pump. But this will cause the part marked with the blue arrow to go into the wall behind.

So something is wrong here. And on a parts diagram of this, it can look like something is wrong. The part marked in blue above is part 15a and 15b below and do you see what I see that this blue part is mounted incorrectly? Look at the mounting bolt to the part and the part.

What this part which I suspect is fitted incorrectly does is press on the part below marked in red and pushes it inwards also marked in red. And the blue is the stop on which that part should rest on when the engine is idling.

So is this mounted wrong or have I misunderstood? And post pictures below where I move this and arrows show the way that is up. And the first picture is full throttle.

And the picture below is idle.

So I don't know if I have misunderstood how this works and find it strange if this is wrong that the engine has worked at all. So I hope that someone can look at this and I hope that I have explained this well enough.

[DSdriver]

Was the car driving alright when you bought it? (just to save me re-reading the whole thread)

[Dyslexic Viking]

2 minutes ago, DSdriver said:

Was the car driving alright when you bought it? (just to save me re-reading the whole thread)

It did. But I don't know these cars so for all I know things could be not as they should.

[Mr Pastry]

Your explanation seems entirely logical to me, although I am not a diesel specialist.

You are suggesting that the cam 15 is fitted upside down.  This will prevent it reaching full throttle.  It is surprising that anyone would do this, but it is possible.

 Since you have got this far, I can see no harm in refitting the cam in the position shown in the diagram and trying it.  Note also that the position of lever 16 can be adjusted on the shaft which may affect things.

Don't take my word for it though.  What do others think?

 

[Dyslexic Viking]

To help with what I have explained above about what I think may be a wrong angle on the part, I have made a shit drawing. The top is as it is now and the bottom is as the manual says it should be.

[Dyslexic Viking]

5 minutes ago, Mr Pastry said:

Your explanation seems entirely logical to me, although I am not a diesel specialist.

You are suggesting that the cam 15 is fitted upside down.  This will prevent it reaching full throttle.  It is surprising that anyone would do this, but it is possible.

 Since you have got this far, I can see no harm in refitting the cam in the position shown in the diagram and trying it.  Note also that the position of lever 16 can be adjusted on the shaft which may affect things.

Don't take my word for it though.  What do others think?

 

Thanks. This is exactly what I think the part is mounted upside down. And I think you're right here, but it will be interesting to hear what others think also.

[Dyslexic Viking]

2 hours ago, hairnet said:

hvor mye til larvik m9?

corolla har navnet mitt på

 

 

From me to Larvik? About 2.5 hours.

[busmansholiday]

Is that why there was a bit of hose in there? Basically somebody didn't realise the cam was back to front so put the hose in to operate the pump and give the car full throttle.

[CreepingJesus]

I'll concur that it looks like it's upside down. It looks to me that there's wear on the cam's securing bolt, so I'll suggest that it's worked at all because the diaphragm spring - part #13 in the diagram - has pushed the plunger up to the incorrectly mounted cam, and it's the bolt head it's made contact with. 

Could've been like that a long time: neither part is massively stressed, and they seem from earlier pics to have been well lubricated. 

If the bolt can secure the cam from either side, that might be how it's happened, and the means to rectify it.

[Dyslexic Viking]

Thank you both. And it's possible that's why there was a hose there. And it is possible to put in the bolt on both sides of the cam.

So tomorrow, unless someone says otherwise, i will turn the cam to the right way and then start the engine and see what happens. I am excited to see what will happen then.

[Saabnut]

Make sure you have a means of shutting it down in case of runaway when starting. I would suggest removing the air filter assembly and have a piece of wood handy to press over the air inlet so you can starve it of air. Will probably be fine, but better to be sure.

[Dyslexic Viking]

2 hours ago, Saabnut said:

Make sure you have a means of shutting it down in case of runaway when starting. I would suggest removing the air filter assembly and have a piece of wood handy to press over the air inlet so you can starve it of air. Will probably be fine, but better to be sure.

Thanks. This is a very good idea and I have thought about this so I will do this. To be honest I'm not very comfortable messing with a diesel pump so the fear of blowing up the engine has been in the back of my mind the whole time.