The holes on the bushes don't need to line up with the grease nipples because the bushes have a grease track or groove around the circumference of the bush to link all the holes. In fact, it's actually advantageous to not line them up as it forces the grease around to all the holes this distributing the grease more evenly around the shaft, bush and collar.
lawsonium, yes you are correct, and if you listen to my video you will hear me say what you have just said. But the problem was the grove around the bush was full of crap stopping the grease getting to any of the holes.
@@johnbower if you are working in mud and water, this is common. You might need to do yearly disassembly to clean the groove track of debris and that also lets you inspect the bushing, pins, and grease nipples Just my 2cts as a preventive measure.
Hi Colin, quite an easy operation to get the new bush in, you need a threaded rod about 250mm long with a nut on each end, I used 20mm diameter high tensile steel ( but mild steel should be OK ), and you also need two metal plates about 6mm thick with a hole in each plate to act as big washers, pass the threaded rod through the end of the dipper arm and through the new bush, place a metal plate washer over each end of the threaded rod fit the nuts on each end and tighten them up, put grease on the threads and make sure the threaded rod passes centrally through the bush and dipper arm hole.
I do not know what you have in your shop, but if I had a lathe I would have welded the shafts and turned them and then made a bronze bushing ti replace the plastic.
Hi bill, I think the earlier machines did have two bronze bushes here, but the reason they now use this hard wearing nylon material at these two points is because these two pins are removed and replaced quite often on building sites when you have to change the type of bucket you are using, when doing this on a building site it is difficult to keep pins & bushes clean, so these two pivot points are expected to wear this is why they use a nylon material as it is easy & cheap to replace. Having said that you would be surprised how long they do last if they are kept clean and greased, one of these bushes is still the original and is 12 years old.
