I need a manual for the Pfaff 138-6 industrial sewing machine...thank you.

Pfaff has many of there manuals here: http://www.pfaff.com/en-US/Support-and-Updates/Support . I found a manual for the 138 using the search option after clicking on the down arrow in the Machine Name box. The direct link to the manual is http://www.pfaff.com/SiteMedia/PFAFF/Products/Machines/Support-manuals/Pfaff_138-139-manual-ES-DE-FR-ES.PDF . However, the only place I see any reference to 6/21 is in the section on needles. (Some 138 models used a specific needle system.) I don't see any letter codes after the 6/21 in the manual.

I hope this helps.

Cindy Wells

try contacting pfaff customer service about the machine. they may be able to provide you a manual

here are 2 links, choose which one you want to buy from
Pfaff 138 138 6 Instruction Manual
Pfaff 138 Parts

Go to this webpage to download one, it is free but you must register.
http://www.sewingmachinemanuals.com/pfaff-138

Take the foot off the machine
Remove the needle plate
Remove the feed dogs
rotate by hand until the needle is at the lowest position
continue rotating until the needle rises 2 mm
the hook assembly should be passing exactly by the scarf of the needle
if not loosen the two screws that secure the the hook assembly and rotate the hook assembly by hand until it is exactly at the scarf of the needle and the distance between the hook and the scarf is .1 mm (almost touching the needle)
tightened the two screws, replace the feed dogs and foot and it should sew perfectly

http://s2.vsmgroup.com/VSM/Pfaff/pfaffmanual.nsf/1fd5659e6f37141041256697003e64c0/d40760dedc7a000d852575f300570387/$FILE/Pfaff%20138-139%20.PDF

I just found this website with a clear version of the manual for Pfaff 138/139
Hope this helps you....it did me.

go to sewvacdoctor.com & email them about a manual

You may have a different weight thread in your bobbin and your need may be wrong for your project. Check your manual or call Pfaff.

try at www.ifixmachines.com

if it is the industrial model, i should have one for you.