Saturday, September 05, 2009
Rear wheel bearings
The rewound alternator saga is still ongoing...however on my return from a test ride today I wobbled the rear wheel. Why? I don't know. Anyway it was obvious that there was play in the rear wheel bearing on the drum brake side. I should have renewed them when I did the rebuild but they have been fine until now so why bother?
The quick release hub worked a treat and I had the wheel on a soft wood stool I keep just for this purpose in a few minutes. The left bearing and oil seal were easily drifted out whilst shifting the spacer. The right hand, brake side, wouldn't budge. Luckily before I did any damage I carefully levered out the oil seal and found that the bearing is retained with a circlip. Note that the circlip is not shown on the Morini parts diagram. Once the clip was out the bearing could be drifted out with difficulty, after heating the hub with a blow torch. It turned the edge of my Facom drift! The parts needed:
I popped the bearings in the freezer while I ate lunch and fitting was fairly straightforward. The only problem is that now I can tell that there is a tiny amount of play in the swingarm.
The drift was squared off with an angle grinder to restore its sharp edge.
The rewound alternator saga is still ongoing...however on my return from a test ride today I wobbled the rear wheel. Why? I don't know. Anyway it was obvious that there was play in the rear wheel bearing on the drum brake side. I should have renewed them when I did the rebuild but they have been fine until now so why bother?
The quick release hub worked a treat and I had the wheel on a soft wood stool I keep just for this purpose in a few minutes. The left bearing and oil seal were easily drifted out whilst shifting the spacer. The right hand, brake side, wouldn't budge. Luckily before I did any damage I carefully levered out the oil seal and found that the bearing is retained with a circlip. Note that the circlip is not shown on the Morini parts diagram. Once the clip was out the bearing could be drifted out with difficulty, after heating the hub with a blow torch. It turned the edge of my Facom drift! The parts needed:
- 2 x 2504 oil seal
- 2 x 3203 bearing
I popped the bearings in the freezer while I ate lunch and fitting was fairly straightforward. The only problem is that now I can tell that there is a tiny amount of play in the swingarm.
The drift was squared off with an angle grinder to restore its sharp edge.
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