I bought a walking foot that looked like that and had to put a wooden stake through its heart and bury it in the back yard. It didn't work right on the Janome I bought it for or the low shank Singer (An old Stylist) I still use a lot.
My directions for the beast were not one bit of help.
1. Raise the needle and presser foot.
2. Loosen the set screw on the foot holder to remove it.
3. Attach the walking foot to the presser bar with the lever on the needle clamp and secure it with the set screw.
* Operate the machine at a low to medum speed.
* Set the stitch length in the range of 0-4.
I bought a different one from Nancy's Notions and so far, so good.
Jois