Umnumzaan issue

scraca

scraca

Joined
Jul 1, 2012
Messages
334
Just took apart and cleaned my Umnumzaan for the first time and now when its back together and running smooth, the blade is off center when closed. If I tighten up the pivot real tight its back to center but very hard to move the blade. Any ideas?

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Tighten it all the way, then a quarter turn left...thats the advice on many nuts and pivots for me. Maybe it will work for you
 
happened to me before as well.. i just took everything apart and put it back together again and the problem disappeared lol
 
Guessing you didnt assemble back properly. Take it apart and try again.
 
Would the Hinderer XM fix work here?

1. Open blade to 90 degrees and tighten pivot so that it is really tight.

2. Close the blade and loosen frame screws so they aren’t tight, but still holding the frame together.

3. While the blade is still in the closed position, pull blade towards the side you want the blade to move. In my case, I pulled the blade toward the liner/scale.

4. While pulling blade, tighten the frame screws.

5. Loosen the pivot and adjust it to the desired tension.
 
No its not idiot proof. We've all seen many people fail at putting their sebenzas back together with pinched washers and the sebenza is easier than the zaan. Take apart your umnumzaan completely, not just the blade, and fit it back together. Make sure the washers are where they are supposed to be. If the knife was perfect before you took it apart then it should be perfect once you put it back together.
 
I take/took it completely apart. Put it together like this. Handle, pivot, washer, blade, washer, handle, rear screw, pivot screw. I am a licensed master plumber with 18 years experience and am mechanically inclined.
 
I once took a zaan apart to clean it and if I remember correctly I had to work both sides when tightening to get it centered. It's just a little more work than the 21 or regular sebenza.
 
dinokay said:
I once took a zaan apart to clean it and if I remember correctly I had to work both sides when tightening to get it centered. It's just a little more work than the 21 or regular sebenza.
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What do you mean by that?
 
This was awhile ago but I do remember that when I tightened it say from the right side it would go alittle off center so I loosened it and tightened it using both the right and left side until I got it just right. I hope this helps, it was the one and only zaan I took apart. I also remember that the zaan had to be reassemble with some sort of paste applied on the thread to lock it and when everything was aligned with no play that was it, no more tighting. I much prefer a sebbie for taking apart and cleaning.
 
When you are putting the knife together make sure you pressing down hard on the blade as you sandwich the scale on top of it so that the lockbar isnt pushing the blade up as you screw everything back together.
 
scraca said:
I take/took it completely apart. Put it together like this. Handle, pivot, washer, blade, washer, handle, rear screw, pivot screw. I am a licensed master plumber with 18 years experience and am mechanically inclined.
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No offense but lots of us have mechanical experience. When something has as tight tolerances as CRK knives do however even the smallest variance can change things. I've put my Sebenza back together"correctly" experienced an issue taken it back part and put it back together in the exact same way and had the issue disappear. Sometimes you just have to take it apart and try again.
 
TLR said:
No offense but lots of us have mechanical experience. When something has as tight tolerances as CRK knives do however even the smallest variance can change things. I've put my Sebenza back together"correctly" experienced an issue taken it back part and put it back together in the exact same way and had the issue disappear. Sometimes you just have to take it apart and try again.
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Yea I hear ya. I was just stating that I'm not a complete retard.
 
kawr said:
When you are putting the knife together make sure you pressing down hard on the blade as you sandwich the scale on top of it so that the lockbar isnt pushing the blade up as you screw everything back together.
Click to expand...


Took mine apart to remove the lanyard last night and while putting it together figured i better do what you just explained. Made sure to put the male and female pivots on the side they came out of. Pushed the female side throught and put the knife together, applied a drop of blue lock tight to the male side and tightened all the way down by turning the male side, then backed off just until i was happy with the blade play. Fliped it a few times and let the lock tight sit. It working perfectly now, much more smooth than when new out of the box although some of it may be due to break in.
 
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