A few years ago an old experienced mechanic brought his Jubilee to me with a leaking rear seal. The rear seal had been leaking so he replaced it but while he had it apart he threw in new main bearings for good measure. The rear seal still leaked after he put it together. After several attempts with both rope and neoprene seals he couldn t get the leak stopped. Then his shop roof collapsed under a snow load and he decided not to rebuild so he brought it to me. I couldnt get to it right away so my son tackled it. He pulled the engine out, put it on the stand and did a good job replacing the seal. It still leaked so now I tackled it. I put the engine on the stand and while it was upside down I pulled the rear main bearing to have a look and I found the problem. The bearing shell was standard sized and the crank was stamped .010. I put in the right bearings along with a new seal and the leak stopped. I dont know how far you went with your rebuild but while it is on the stand it wont take long to pop a main bearing out to take a look.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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