Replacing Necchi Presser-Foot-Lifter Lever 


Replacing the Presser-Bar Lifter on a Necchi Mira BU (shown) or Nova or Nora and probably other zigzag models

Before anything else, the legal caveats:

•  This information is offered to share how I replaced the presser-bar lifter in a Necchi Mira BU (zigzag). It should be essentially the same for a Nova, Nora, and probably other models as well. I have had good success and no problems doing what I do, but I am not guaranteeing that it will work for you. Please use your common sense and be safe.

•  This information is property/copyright me; it may not be copied and/or distributed in other forums without my express written consent.

Okay, let’s get started: The presser-bar lever is prone to damage since it sticks out. If yours is bent or broken, it can be replaced. It’ll take some time, but it’s not difficult. For BF (straight-stitch only) models, the principle is the same—you have to get the needlebar out to get to the presser-bar lever—but the mechanism is simpler since there is no “cage” to remove.

(1) Start, of course, by taking off the extraneous stuff... needle, foot, thread cutter, and throat and slide plates.

(2) Take the faceplate off; this is what you’ll see:

01FaceplateOff

As you can see, there is a metal “cage” around the presser-foot bar, that prevents you from getting to the lifter lever. So it’s all got to come off.

02cCage

Just so you can understand what you’re looking at, the photo above shows the cage (I’m holding it at left) next to one in place in the machine. The presser-foot bar goes through the left side, and the needlebar goes through the right side of the cage, and the whole piece pivots on the needlebar side when in zigzag mode.

The overall process is first to remove the presser-foot bar, next to remove the upper and lower collars that hold the cage in place in the casting, and then remove and replace the presser-foot lifter lever.

(3) To remove the presser-foot bar, first remove the silver thread guide, which is held by two screws to a black block on the lower half of the presser-foot bar. (You can see the guide in the first photo above; it has been removed in the second photo.)

(4) Next, remove the grub screw that is below the two screws you just removed. This is what holds the sliding block to the presser-foot bar, and is where you adjust presser-foot height and position. You can see all three screw holes and the black block in the photo below.

03NBgrubScrew

(5) One more thing to remove before you can get the bar out. At top, fit into a groove in the knurled piece, is a circlip. It’s black in the photo below, above the “finger” and near the top of the cutout. Take the clip off. That’s often easier said than done.

04Circlip

(6) Once that circlip is off, the knurled screw is released and you can screw it off the “finger” piece (pressure indicator) and slide it out of the casting through the top. Note that it screws on and off *backwards* from usual, i.e., clockwise off and counterclockwise on.

05KnurledScrewOut

(7) Slide the presser-foot bar up and out through the top, and collect the loose pieces (pressure-indicator finger, spring, and cup at the bottom of the spring) from behind the cage. You don’t need to take the black sliding block at bottom out, you can just maneuver it out of the way as necessary.

06NeedlebarOut

For the sake of understanding, the following photo shows the pieces that make up this assembly. Note the two collars at left. These install in the machine casting at top and bottom, and hold the cage in place. In order to get the cage out, these collars must be removed.

07Parts

(8) The upper collar is secured by a grub screw at the top (shown in photo below); take it out.

08UpperGrubScrew

(9) The upper collar is flush with the top of the machine, shown in the picture below. It’s likely stuck in there pretty good. I use Kroil to help break it free. If you like another product, use what works for you. In my experience, there is nothing better than Kroil, which is available mail-order from the manufacturer, Kano Labs. NAYY (no affiliation, yada yada).

09TopCollar

I use a punch to slide the collar down and out:

10TopCollarPunch

(10) The lower collar is also secured with a grub screw, this one is accessible through the light fixture if you have a long enough screwdriver, otherwise unscrew the light framework to get to the screw.

11LowerGrubScrew

Again, I use Kroil and a punch to push the lower collar down far enough to release the cage.

12LowerCollarPunch

(11) Finally, we can get to the presser-foot-lifter lever itself! It is secured by a grub screw, this one on the back and to the left of the lever. Take it out.

13LeverGrubScrew

(12) The lever is mounted on a pin, simply wiggle it out.

14LeverOut

Okay, the broken lever is out! Now to replace it with the new one.

(13) When putting your new lever in, be sure that the tension-release piece (black in photo below) is pushed up so the end rides on top of the lever, and isn’t caught below. If it’s caught below, you won’t be able to push the lever flush with the casting. Once the lever is in and flush, replace the grub screw to secure.

15LeverBackIn

(14) Next, hammer (I use a piece of wood against the metal) the bottom collar back into place, aligning the cage and the black slide mechanism properly. Then hammer the top collar into place. Again, I use a block of wood to protect the metal.

16UpperCollarBackIn

(15) Replace and tighten the grub screws to secure the collars, and replace light fixture if you’ve removed it. 

(16) Clean/polish the presser-foot bar while you have it out. Then replace the spring with washer/stop at bottom, behind the cage. Move the handwheel as needed for easy access.

Slide the bar from the bottom up through the casting, washer, spring, and tension finger; you’ll need to compress the spring to slip the tension finger on top of the stack. 

Note the textured stripes on the bar; these are to position the height of the bar. The lower stripe should show through the grub-screw hole, and the upper stripe should be between the top and middle screws on the black slide block, and not show. The picture below shows the bar properly installed, with another one next to it to show the markings. 

17SetNBheight

To set the foot position straight, install the throat and slide plates, and put a foot on the bar. Adjust so the foot is riding perfectly straight on the feed dogs, then recheck that you haven’t moved the bar up or down, and secure with the grub screw. Note that this grub screw is likely to have a sacrificial washer in it. Others may as well, I’ve not found a lot of consistency in this, but often find them in Necchis. If you found tiny little discs when you took things apart, that’s what they are.

(17) Finally, screw the knurled screw on through the casting at top, remembering it’s a backwards thread and tightens counterclockwise. Push down on it to put the circlip back in the groove, securing the piece and finishing the job.


Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014 McKenna Linn, All Rights Reserved