Need help repairing Singer 112W139 stitch length mechanism

[CowboyBob]

Doug,

Here's a page with the diagram of the stitch length mechanism.

Bob111w old style stitch length info.bmp

111w old style stitch length info.bmp

[DougVL]

Doug,

Here's a page with the diagram of the stitch length mechanism.

Bob111w old style stitch length info.bmp

Bob -

Thanks for the picture. I had found others like it in other Singer manuals, but this one is clearer.

My screw CC is broken in half. I fished out the broken-off tip by putting a magnet on the shaft of a long,thin screrwdriver and poking it down into the hole after removing both screws.

In my case, to adjust the stitch length, I loosen the unlabeled clamp bolt located at 9 o'clock in this picture, rotate the eccentric a little, then re-tighten the bolt to hold the adjustment. Otherwise the spring, at the bottom of the eccentric (6 o'clock in the picture) pushes the stitch length all the way to either the min or max length - I forget which.

Cobra Steve -

It wasn't dirty or stuck, but I did clean and lightly oil it. Thanks for the tip!

Doug

[DougVL]

<br />Bob -<br /><br />Thanks for the picture.  I had found others like it in other Singer manuals, but this one is clearer.<br />My screw CC is broken in half.  I fished out the broken-off tip by putting a magnet on the shaft of a long,thin screrwdriver and poking it down into the hole after removing both screws.<br /><br />In my case, to adjust the stitch length, I loosen the unlabeled clamp bolt located at 9 o'clock in this picture, rotate the eccentric a little, then re-tighten the bolt to hold the adjustment.  Otherwise the spring, at the bottom of the eccentric (6 o'clock in the picture) pushes the stitch length all the way to either the min or max length - I forget which.<br /><br />Cobra Steve -<br /><br />It wasn't dirty or stuck, but I did clean and lightly oil it.  Thanks for the tip!<br /><br />Doug<br />

<br /><br /><br />

Bob -

I received you PM, but for some reason this time I can't answer or respond to it. I wanted to send my email address, and ask about a part for a Singer 29K73.

Doug

[CowboyBob]

my email address is: sewmun@aol.com

[Neuseweather]

I just repaired a 107W3 which is similar and had the same broken screws. I can take pictures to detail the repair if anyone is interested. Very simple and only required ~$4 in parts which were still available. These things are pretty much bullet proof, Just the old manuals are the weak link.

[DougVL]

I just repaired a 107W3 which is similar and had the same broken screws. I can take pictures to detail the repair if anyone is interested. Very simple and only required ~$4 in parts which were still available. These things are pretty much bullet proof, Just the old manuals are the weak link.

Pictures might be nice, but the parts source would be even nicer!

Doug

[busted]

Looking for help repairing my new-to-me old Singer 112W139 machine. I tried to find out just how old

it is, but Singer says their data from the period when my serial number W1324293 was made was lost

during or after WW II.

I recently got a Singer 112W139 and I need some help with it. The stitch length adjustment doesn't

work. The machine sews pretty well but only at the longest stitch length.

I have been examining the stitch length adjustment mechanism but I don't understand how it works. I

have seen the mechanisms on other machines - home sewing models and my Mitsubishi LU2-400. I

understand those, but they're all different than the 111W series machines with the stitch length

adjustment control at the center of the machine drive pulley and working inside the machine's upper arm

shaft.

On my machine, the adjuster won't turn, which would move it in and out because of the thread on the

pulley end of the arm shaft. I have found that the FEED DRIVING ECCENTRIC REGULATING SCREW (part number

200429) is broken and about half of it is missing. The lower, rounded-end part that would engage the

point on the end of the FEED REGULATING SPINDLE (part number 224122) is gone. Or maybe still stuck

inside the FEED DRIVING ECCENTRIC REGULATING BRACKET (part number 237521).

I would really like to find a diagram that shows the machine's feed length components together in

their working relationship. I have a Mitsubishi LU2-4410 manual and it has a sort of cutaway drawing like that, and I've

seen feed mechanism drawings in the couple of sewing machine repair books I've been able to read.

Page 18 of the 111W & 112w manuals have an X-ray view of the Feed Driving Eccentric Regulating Bracket

and Shaft which shows the the adjusting screw, and the spring and plunger on the opposite side of the

shaft. But it doesn't show what the shaft is adjusting or how adjusting it affects the stroke of the

stitch length mechanism.

So, if anyone can help me find some information to help troubleshoot and repair my machine, I'll be

very grateful! And of course I need to find a few parts, even a new arm shaft (p/n 240102) because the

stitch length control thread on the pulley end has also been damaged, presumably by someone's attempts

to turn the adjustment. Although replacing that shaft would be very difficult - maybe I'll have to

live with limited functionality of the stitch length control if I can even get the adjustment mechanism

to work at all.

BTW, I'd also like to find out when it was made. Its serial number is W1324293, but the Singer dating

site says the records for this range of serial numbers was lost or destroyed around the time of WW II.

Did you get this machine working properly yet? If not here is a link you might be interested in Index of /IPpartChart