BE Klixons Cracking

[Kat]

HAs anyone ever had a problem where the Klixon on a BE motor keeps cracking in half?

I've elminated the following causes:

a) Pinchasers jamming the button in.
b) Too much current (varified with an Amprobe)

I've got one lane that goes thru Klixons like crazy. Seems every time I have a problem, the Klixon is either in two pieces or severly cracked to where there is no connection.

Any ideas?

Many thanks.

[dane300]

Re: BE Klixons Cracking

We had this problem we found that it was bescause of the contacts we had in and another time it was a bad capacitor took us 6 weeks to figure out it was in the contacts bescause they were brand new

[WHERE IS THE SHOT]

Re: BE Klixons Cracking

Is the machine jamming if a pin comes over the
turnpan and hits the klixon it could break it.

[Kat]

Re: BE Klixons Cracking

Shot:

No, pins jamming are not the cause. I should have mentioned that I ruled that out as well in my original post. But, thanks anyway.

Dane300:

I will check the cap out tomorrow, as well as the contact points.

[8270king]

Re: BE Klixons Cracking

I believe there are different Klixons for Combo and BE motors. Possibly even different ones for GE and Westinghouse BE stators.

Maybe you have the incorrect Klixon installed for your application.

Jerry

[rrev]

Re: BE Klixons Cracking

Keith, check you are using the correct Klixons (like Jerry said) ...

GE Backend uses CET67DB
Westinghouse Backend uses MEG40BB
National Backend uses MEF22EB

They are all a bit different. Klixon rate the things by temperature (the numbers) and it's a bit cryptic to work out. It appears that someone in AMF a long time ago worked out which Klixon suits each motor best.

Here in Australia we use a local brand as field replacements and they are rated by current (Amps) which is much easier to figure out. Basically, we use 6.5A for all backend motors and 5A for combos. We've been doing that for a long time now and it seems to be working very well.

Ray

[Kat]

Re: BE Klixons Cracking

Ray:

That's some good info to know in regards to the numbers on which Klixons. I also thought about the wrong Klixon idea, so I checked ALL of my BE stators and found they're all the same. I've been using the number to order from AMF found in the motor repair book.

The "code" on the back of the Klixons I'm using is MEH18CD. Is this wrong? I have Westinghouse Backend motors.

Many thanks to all of the guys who put in their help. I just don't know why this is the only lane that's cracking the Klixons...all else run fine. [img]/content/btubb/images/%%GRAEMLIN_URL%%/confused.gif[/img]

[felix]

Re: BE Klixons Cracking

Kat; my klingon's have the same code, part #785 501 394 and no problems except when chasers use a punch and hammer on em.

[the old dirt man]

Re: BE Klixons Cracking

KEITH:
are the klixons going bad with different stators?
or is the same stator being put back on after the klixon has been replaced. [img]/content/btubb/images/%%GRAEMLIN_URL%%/confused.gif[/img]
and when they crack are the stators as hot as 3 french whores on there day off. :p
if it's the same stator,is it a ao smith that came
from vantage?? [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img] CUJO

[rrev]

Re: BE Klixons Cracking

I've had a couple more thoughts on this ...

If the same motor is going back on the same machine all the time, it could be that something in the pit (say, a bad bearing or something) is causing extra drag on the motor making it draw more current than normal and the Klixon is cracking due to overheating. Maybe.

Or maybe the gearbox (if the stator/gearbox combination remains the same) is preloaded too heavy causing, again, too much drag and too much current draw.

Hmmm, ok here's another one .... maybe the mounting boss on which the Klixon mounts is uneven, so when you tighten the thing down it causes later cracking.

If you go to this web address, you can download a fairly useful .pdf document <a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank"><a href="http://www.ti.com/snc/docs/prot/phen.htm" target="_blank">http://www.ti.com/snc/docs/prot/phen.htm</a></a></a></a></a></a></a></a></a>

Gotta go pack a bag for Bowl Expo now ....

Ray

[felix]

Re: BE Klixons Cracking

Kat so sorry about your troubles; but thanks to rrev....WOW! I am going to call Texas Instruments monday and find out where I can get the PS Series thermal ciruit breakers.(Sealed construction &amp; automatic reset) What a concept, sounds like the pin chasers can't monkey this one up. Also no more pin jam breakage. [img]/content/btubb/images/%%GRAEMLIN_URL%%/wink.gif[/img]

[WHERE IS THE SHOT]

Re: BE Klixons Cracking

Kat maybe there is a short in your start winding or run winding, it may benefit you to have the stator rewound. Just a thought!

[Ed Fox]

Re: BE Klixons Cracking

I'm going to go out on a limb here but is it broken when you come in the next day or does this happen while your there? The reason I ask is are you sure a its not just over heating and one of the pin chasers isnt just jamming a screw driver in there? [img]/content/btubb/images/%%GRAEMLIN_URL%%/frown.gif[/img]

Charlie [img]/content/btubb/images/%%GRAEMLIN_URL%%/smile.gif[/img]

[BowlEquip]

Re: BE Klixons Cracking

rrev may be onto the problem. If the end bell got a little tweaked in the klixon mounting area, perhaps years earlier, you may be mounting the klixon on a slight, but unnoticeable angle, stressing out the plastic housing. If you suspect this, put a #6 washer between the klixon and the end bell to keep the circular part of the klixon away from the casting. Do not overtighten.

[Guest]

Re: BE Klixons Cracking

Here is another thought, something that I ran into. Maybe the motor is just slightly out of round which can cause extra load and overheat the stator by causing drag.