Ok Nach langem hin und her, viel Kriechoel und noch mehr Ueberredungskunst mit dem Hammer (ging leider nicht anders) ist die Kulu nun draussen.
Meine Sorge ist nun, dass ich die anderen Kuluteile und das Flywheel beschaedigt habe und ich Vibrationen bekomme. Ich habe mal ein Bild von dem Hammer gemacht. Gechlagen habe ich hauptsaechlich auf die Kuluscheibe und auf den Abschlussring, dort wo die Passtifte sitzten. Ich weiss diese Beschreibung ist sehr subjektiv, aber ich wuerde sagen, dass ich leicht bis mittelstark geschlagne habe, nie volle Wucht.
Die Kulu scheibe hatte nur noch 4 Milimeter und die Feder ist im Vergleich zur neuen deutlich "platter". Kann ich einfach nur diese 2 Teile Tauschen, oder muss ich mir wegen der Hammerschlaege Sorgen machen und auch die Plate, den Gussdeckel und moeglicherweise sogar das Gehaeuse (luefterrad) tauschen?
Ueber eure Meinungen waere ich Dankbar.
2. Im Kulu gehaeuse war relativ viel Dreck der aber nicht besonders oelig war. Der Simmering zur Kurbelwelle sieht trocken aus, der am getriebe auch.
Frage: Soll ich dei Siri's tauschen, oder kann ich die beruhigt drinn lassen (was ist hier standart practice?). Bilder nach grober reinigung mit Bremsenreiniger haengen an.
3. Hier:
http://bmwmotorcycletech.info/clutch.htm habe ich gelesen, dass die Kulu auch wegen des Plastik-Zylnders in der Mitte rutschen kann.
Hier der Auszug:
Slipping clutch? Acts up when engine fully heated up?...etc...??
On later models, the plastic 'piston' with the metal center, that the clutch lever at the back of the transmission applies its force to, might be too large in diameter,
and stick in the transmission bore when hot. This throwout piston part is next to the 1 inch mark of the ruler in the photo below. The LIMIT is 28.7 mm, and it
can be sanded down, or replaced (read the NOTE! below!). This occurred because tolerances on some transmissions throwout area bore sizes, and these
throwout pistons were not held tight enough. This is from 1981, when BMW changed the clutch design radically. If the piston fits into the bore a bit too tightly
....(it may still operate smooth enough when cold), under some circumstances, PARTICULARLY when HOT, the piston may stick. That is because that plastic
piston material expands a lot faster than the aluminum bore it fits into. Obviously this means that a proper check is with a hot transmission! This can manifest
itself in several ways, INcluding a seemingly slipping clutch. Measure the piston, and if it is over about 1.13" (28.7 mm) when hot, you MAY want to reduce
the outside diameter a bit. I have seen these as large as about 1.142" that still worked OK (NOT all at that diameter WILL be OK!!). I can't give a hard and
fast rule here, but if yours is up to 1.141 or so, I would certainly see how it fits, and if a bit too much friction with a HOT PISTON, I would recommend sanding
the OD a bit. You might want to check the fit, hot, if you have any hot clutch slipping problems, but OK when cold. Whilst this modification can be done on a
lathe with some sanding paper, you can also chuck the rather short shaft tip end in a drill press and use some rather fine sandpaper for this. Use a micrometer
or vernier caliper to measure the piston diameter. Inspect the bearing, and if it looks bad, replace it. Grease it with a good grease (Do NOT use moly).
While the bearing is theoretically lubricated by oil from the transmission, that is not hardly so at initial assembly....so use a soft mild grease, non-moly.
>>>BMW has had three versions of the unit, and offers a replacement piston: 23-13-1-464-167, another way of coping with a sticky hot piston....and if your
bearing is shot, you can consider that pricey part, as it is a new design, and incorporates the bearing, and it has the proper diameter. If your old items are
in good condition, you really do NOT have to spend the bucks....you can sand yours. NOTE!....it has been reported to me that BMW is now shipping
an all-plastic part that has the same old problems!....so, be sure that no matter what part you have in YOUR bike, that it is not expanding
and seizing up!
Gibt es dazu erfahrungen, sollte ich mir den Zylinder auch ansehen, gibt es eine Standartmodifikation? Auch hier waere ich fuer Hilfe Dankbar.
Gruss aus London
Christoph