Durkopp Adler 239-125 Missing Oil Pan / Timing?

[machineage]

Thanks @Constabulary

The top part of the hook looks OK I think, would there be a reason to replace it? A replacement through is very cheap, thanks for that!

I checked for play between the fork & the cam, and there is hardly any play. I can't get a sheet of paper between the fork & the cam, so I guess this is some good news? The fork has the oil soaked felt to keep the two lubricated.

As for the feed dog, I used an incorrect description above, I meant to say the feed dog is secured to the feed bar, not the feed fork. I can see the bar is secured with the feed bar hinge screw, one side of which is just accessible with a slotted head, but the other side (hexagonal nut head) is inaccessible. I tried to unscrew the hinge screw, without success so far.

But now I see another problem... There isn't enough room to remove the hinge screw, either to the left or the right side, because it will hit the base casting before it can be removed given its length 

The only way I can see to remove the feed bar, is to remove the feed driving rock shaft first.

Has anyone removed one of these feed bars?

Thanks again

Edited April 30, 2021 by machineage

[DonInReno]

11 hours ago, machineage said:

A more concerning problem though - I noticed what I thought was a missing screw that secures the feed dog to the feed fork. However on removing the feed dog, it looks like the screw has snapped and the thread is still in there 

That is a bummer!   A left hand drill bit would be ideal if you could get the right angle.

Im just thinking out loud, but it might be worth trying to degrease the screw and put a tiny drop of jb weld on the end of a cut off round toothpick....if the screw is really loose in the hole it might have enough torque to gently back it out?

Ive never had the patience to scratch a slot in a broken off screw, but I have seen a watch maker carefully grind a very small sharp chisel point on the end of a die file and over the course of an hour scratched enough of a slot that a very small eye glass screwdriver backed the screw out.   I would need a magnifying glass to see what was happening.

[machineage]

Thanks @DonInReno

Some good ideas there!

I really needed to get this feed bar out, it's just impossible to get decent access to the stuck thread with the feed bar in situ.

So....

I removed the feed fork, simple enough. I then marked the feed drive rocking shaft for both rotation & lateral positioning where it is clamped. I then loosened the shaft clamp screws, and the grub screws for the two stop collars. I was then able to move the shaft to the left, and rotate it to gain access to the feed bar hinge screw and nut. Removing this screw released the feed bar.

So now I need to contemplate removing the stuck thread! I will see if I have a small enough left-hand drill bit first!

 

Edited May 1, 2021 by machineage

[shoepatcher]

Use a small left hand drill smaller than screw  to drill a small hole in the screw.  I would look for a titanium coated drill in left hand twist. The drill working in reverse may back out the screw. Be careful not to bogger up the threads in the feed bar.

glenn

Edited May 2, 2021 by shoepatcher

[machineage]

4 hours ago, shoepatcher said:

Use a small left hand drill smaller than screw  to drill a small hole in the screw.  I would look for a titanium coated drill in left hand twist. The drill working in reverse may back out the screw. Be careful not to bogger up the threads in the feed bar.

glenn

The smallest I had was 3mm, which was too big, so I ordered some 1mm & 2mm bits yesterday. I've had good results with L/H bits before, so fingers crossed they work again!

Edited May 2, 2021 by machineage

[machineage]

The 1mm & 2mm left hand bits arrived today. I drilled a short pilot first into the snapped thread, then went at it with the 2mm bit, and hoorah 

These left hand bits have gotten me out of a fair few sticks in the past, and they saved the day again!

I'll source a replacement screw for the feed dog, and the bobbin, then start the process of timing the machine.

Edited May 6, 2021 by machineage

[Constabulary]

as far as I recall they are the same as for the Singer 111 feed dog - but I´m not 100% sure.

https://www.college-sewing.co.uk/200106-feed-dog-screw-singer-111w.html

Maybe worth checking with College Sewing anyway.

Edited May 6, 2021 by Constabulary

[machineage]

Thanks @Constabulary

I’m drawing up my list of parts to buy for this machine from College Sewing, which include a new belt, bobbin winder and cotton stand.

They looked at a Durkopp parts list to check availability & pricing, and a number of parts are not stocked or have very long lead times, if indeed they are still made. I did suggest this machine was very similar to Singer machines, but they wouldn’t guarantee any of the Singer parts fitted, and didn’t offer them. So I’ll take my chances I guess.

I tried the feed dog screw from my Singer 211G166 and that fits, so I guess part #200106 from College sewing will be correct. The presser foot screw is also missing, but again the screw from my Singer fits, so I will order #201031

One of the screws that’s missing and causing problems is the bobbin case tension spring fixing screw. Whilst the bobbin case on my Singer looks almost identical, the tension spring fixing screw won’t fit the Durkopp bobbin case. It’s slightly too large in diameter.

The other is the rear throat plate screw. This is the same size thread as the feed dog screws which fit, but obviously a different type of screw.

Thanks again