Mazzer Robur - Bent Adjustment Collar

#1: Post by **someguy12** » March 14th, 2015, 12:04 pm

Hey guys,

Hope all is well

UPS just delivered a beast. A fully functional one with some tweaks required.

First of all, the adjustment collar got bent in previous shipping and is now locked in placed with what I assume is coffee locking the threads. I was wondering if there was any other way than putting it a vise grip? Is there anything I should be careful for/worried about?

Thanks in advance and have a great one,

JP

#2: Post by **TomC** » March 14th, 2015, 1:01 pm

It's probably cross threaded. A fatal blow unfortunately.

#3: Post by **hankua** » March 14th, 2015, 1:11 pm

Looks like the entire grinder assembly shifted; press fitted to the shell.
http://www.cafeparts.com/productDetail5 ... 2&ItemID=0

March 14th, 2015, 1:21 pm

I will inspect further but in all cases I am screwed right?

#5: Post by **OldNuc** » March 14th, 2015, 1:42 pm

Depends on exactly what the condition is.

#6: Post by **TomC** » March 14th, 2015, 1:45 pm

Wow, big difference looking at the picture on a real screen versus a cell phone. The upper burr carrier doesn't look crossthreaded, but jammed in extremely off axis.

I just took my Major completely apart 2 days ago. I know the structures are a little different for the conical vs flat, but I don't think you'll find an easy/affordable solution to the problem you have.

Years ago, I made the mistake of buying what looked like a great deal on a SJ on eBay. It came and it was clearly apparent that the burr mount was entirely, hopelessly cross threaded. I ended up getting my money back, because to repair it wouldn't make sense financially. So I sucked it up and bought one new.

#7: Post by **Bob_McBob** » March 14th, 2015, 1:47 pm

I would send this back for a refund.

#8: Post by **hankua** » March 14th, 2015, 1:49 pm

someguy12 wrote:I will inspect further but in all cases I am screwed right?

Maybe not, but probably a job for the local machine shop.

#9: Post by **Gman** » March 18th, 2015, 11:08 am

Yeah, I saw that listed and wondered about the claim re: the bent collar. I figured there was a reason they didn't do a close up and also to bend the collar would take a huge impact which meant damage somewhere else. I would see if you can find a serious espresso repair shop that offers grinder rebuilds. It may just need to have the motor reseated. I read here that people have had success rebuilding their SJ's and Major's by putting them in the oven (disassembled of course!) at 200F and waiting till the case heats up and the motor drops out. I don't know if that would work here.
Keep us posted.

#10: Post by **JohnB.** » March 18th, 2015, 11:42 am

OldNuc wrote:Depends on exactly what the condition is.

Exactly. Unscrew the adjustment collar & tear it down. If the collar won't move soak the exposed threads with penetrating oil & let it soak down through over night. Even if a part of the casting got broken off you could have it welded. Certainly worth your time to figure it out if you can't easily return the grinder.