Dear Lord Vader,
If you find this information of value, perhaps you could include it with your excellent work?
This is a well run-in 48cc grubee skyhawk motor's clutch components.
As you may see, the pucks are rather well greased, and some are slightly burned. In use, the clutch functions very well.
My concern is with the internal clutch bearings not being lubricated.
Included is the reversible puller tool which works on all gears and sprockets on an HT china girl engine. It is inserted in the pinion drive gear, which I also pulled to inspect the seal behind it.
Pic #2 is the clutch face. I marked the steel bearing ring which is pressed onto the hub, retaining the bearings within and holding the whole assembly together.
Pic #3 shows where you may see the bearings, peeping out from the loose tolerances on this motor's clutch. I bought it used, and have no clue how many miles are actually on it. As you may guess, any grease applied to those bearings to prolong their life will be slung directly onto the clutch pads. This is a significant design problem that would be expensive to overcome, IMO.
Pic #4 shows the backside of the clutch assembly. The 3 steel dowels that run all the way through the hub are the ones the clutch release/pressure plate ride on. The 3 holes I have identified are my main point of interest here.
I am going to attempt dis-assembly by cutting off 3 16d framing sinkers to about 1/2" and set the assembly on a steel plate with the nails inserted into those small holes which will put them in direct contact with that steel ring on the opposite side. Then, with a large socket, I will press the center of the hub down, which should separate the ring from the hub and send my (56) lil tiny bearings all over the place for collection and lubrication, before re-assembly
Note: I do not own a hydraulic press.
First attempt will be using a large C clamp. Maybe three...
Next, I'll drag out my 8lb hand sledge and adress it once, with enthusiasm.
If these methods fail, I'll go visit a friend with a press.
IF #2: if the 16d nails bend, I'll use pieces cut equal length from an old drill bit, (using an abrasive blade), or perhaps a rusted allen key. Both these options should be harder than any nail.
ID of the steel ring is 45mm and OD is 60mm.
Pressing the assembly back together will optimally require a steel ring of that diameter, but perhaps 3 grade 8 nuts of the right size might do the trick... haven't yet got to that point...
More notes: Wear pattern on my clutch ring gear seem fine, and backlash with the pinion is OK, but I do show a wear pattern on the pinion that gives evidence the ring gear is wobbling. It is a bit noisy when pedalling any distance, with the engine running or not. I would NOT want to pedal it long.
rc