Pfaff Coverlock 4852

I’ve had my 4852 for 11 years. Great machine and will do a lot of things even tho I use it basically for the cover stitch, as I have another Pfaff serger for regular serging. My BIG problem is I never know when it will stitch correctly. I have threaded and rethreaded it so many times, I can do it with my eyes closed! I know it has a thread sequence that must be followed exactly and I do this, but for some reason it either will not do the correct stitch connection or so many times it will sew just an inch or so and the left needle thread breaks. I have adjusted the left needle tension and it works fine for a few times then it right back with the same problems.
Is there any help for this machine or me??? I’m getting very frustrated.
Thanks in advance for any help that can be given.
My local dealer recently passed on and I’m 100 miles from the nearest dealer.

I have had my 4852 for about seven years. I love it! It is a real workhorse. It is a little difficult to learn to thread but well worth the time to learn to use it.

I was looking at Huskylocks at a dealer and was impressed. Later that day I saw an ad on the papers for a slightly used coverlock 4852 at a great price! I did some research and found the list price for the 4852 to be approx 1000 plus and got it for just 300. The pfaff 4852 is not computerized; it is a basic serger that gets the job done - 5 thread serger with a cover stitch It’s easy to thread and tensions are easy to set. Very happy with the serger and even more happy with the price!