Hello there, I remember reading somewhere a posting about adding powder to a failed electromagnetic clutch that was slipping, and cant find again, if anybody remembers this posting can you point me in the right direction? thru some research of my own I found out that the iron powder inside the clutch is " Carbonyl "E" Iron CAS # 13463-40-6 and the grade is "8 Microns" supposedly this type "E" powder is not very expensive, I understand that if the clutch fails electrically ( for example shorted or open windings) theres not much to do. but if it is other type of failure maybe theres hope... any info would be greatly appreciated. PS: Has anyboody ever taken one of this clutches apart? The source of my information about carbonyl e iron: museum.nist.gov/panels/clutch/modern.htm
Last Edit: Oct 13, 2009 0:37:28 GMT -5 by joemiolli
"Nissan Micra/March and Subaru Justy drivers - If your vehicle suffers a failure phone us first for a diagnostic. These vehicles are fitted with an electromagnetic clutch. When investigating such faults many workshops will tell you that the fault lies with the transmission and that cost of getting your vehicle back on the road will be very high. In most cases, however, the problem lies only with the electromagnetic clutch which can be repaired without great cost (almost the same price as a conventional clutch from a manual gearbox)."
Thanks for all the info Doug, I wanted to know where you found out about the amount of powder required to fill the clutch, you said the factory fill is 65 grams, and I know this is important for the performance of the clutch and the proper functioning.
i've downloaded those factory diagnosis manuals from dusty's. the first one is 26 pages and the second is 34 pages. they do download. there is a guy on ebay selling justy ecvt info in pdf format as well. it is trasmisson repair industry information. a lot of factory subaru info. quite informational. i recommend it if any one has a ecvt. chris in montana 88 Justy DL 91 Justy 5-door ECVT 4WD
I have opened the bad Powder clutch I have , and found very little powder in it, most of it ended up in the bellhousing of the tranny mixed with the leak from the rear oil seal of the engine, also seems that the bearing that supports the coil is worn and it rubs a little bit against the case, the windings are Okay, also, what prevents this powder from coming out? is there a seal somewhere? couldn't find any seals unless the seal desintegrated, I have read about a felt seal to stop the powder from coming out in some powder clutches for non automotive applications, I have researched this powder with the New Zealand shop that repairs this kind of transmissions and the answered that the powder is available for $ 175 NZD roughly $ 125 CAD , plus shipping and handling, now I need to find a procedure to fill the clutch with powder without spilling it, anybody out there with a factory manual can come up with a procedure? I found online a Catalog that listed a Magnetic powder clutch refill sachet, and a part number, but Subaru does not recognize it. any more Information on this subject would be appreciated as a new clutch is around $ 700 USD. Thanks for your help.
This are some pictures of the failed clutch, this clutch was slipping and grabbing, shuddering. seems that the only failure was the loss or deterioration of the Iron powder ( Carbonyl "E" iron ) . In the pictures you can see where the powder came out from, and you can compare it to a good used clutch that is dry.
and this is a Picture of the other Powder clutch and tranny that I am gonna be using in my project as it came out of a good running car that was too rusty to put on the road, notice the opening for the Hydraulic pump shaft, appears to be clean with no residue of powder coming out as in the other picture I posted, Because this clutches are so expensive, I am trying to save the one that failed, they are very simple inside, other than a retaining ring for the Bearing and the two halves of the clutch , the rotor or electric coil and slipring Assy, and the Iron powder, it is a fairly simple assembly, After I get the powder, I will try to assembly it, but have questios about how this clutch keeps the powder in , as I didn't see any seals around the opening for the pump shaft. any info would be greatly appreciated. thanks.
The half that contains the bearing, the circlip behind the slip ring ( not present) and the cooling fins. I Understand that this is the most typical failure of this car, many cars end up in the junk yard because nobody knows how to repair them and in reality they are very simple, there are lots of this cars with brush problems or powder clutch problems, I couldnt understand why this car was slipping so much I believed it was the transaxle at first until I took the powder clutch out. First I noticed the powder coming out, secondly when I turned the clutch via the slip ring it would make grinding noises and it didnt move smoothly , grabbbing and seizing up.
This is very interesting to me. I just bought a 91 ecvt and it doesn't seem to move. When I lift the front wheels off the ground they will spin. I replaced the brushes with a used set that still has a bit of life in it, but didn't change anything. Now I'm going to spin the crankshaft by hand and peep through the brushes hole to make sure the sliprings are smooth. After that, will remove the tranny and checkout the clutch myself. I'm very interested in how yours turns out after you get the powder.
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