Main shaft disassembled
Posted: Wed Oct 19, 2011 7:47 pm
Not too often we get to see a main shaft completely disassembled, so I took a pix.
[ATTACH]14518[/ATTACH]
The pulley sets in the middle between the snap rings and the bearings go on each end and are stopped/positioned by the rings.
[ATTACH]14519[/ATTACH]
Not easy to see, but notice the tapered flat on the aux shaft end is aligned with the flat for the poly-v pulley. The set screw should always align with the tapered shaft. If it doesn't it has drifted.
In this pix you can see that the pulley drifted in line with the shaft to the point of the set screw riding into the end of the flat. This caused a burr to form at the end of the flat and made removal from the shaft very difficult. I first tried pulling it off the non-splined end, but gave up on that after about 5/8 inch(it was waaaay to hard to remove).
[ATTACH]14520[/ATTACH]
Here you can see the reason it was waaay too hard to remove. The burr created at the end of the flat was gouging a groove into the inside surface of the pulley. It came off the opposite direction easier(sorta!). Lesson learned - if the pulley position has shifted(a look into the set screw hole will tell the tale or it is up against one of the rings) one must remove the pulley in the opposite direction(towards the splined end).
Notice in this pix also the dings created by the PO in removing the splined end bearing. This shaft was an e-bay acquisition and the bearing was separated when sold. I assume the PO did not have a bearing puller, and snarfed things a bit removing it. Correction:The dings were I now believe due to an unsuccessful attempt to remove the 'rear' bearing. The front bearing was removed, and I now believe the pulley was forced to slide on the shaft while removing the front bearing. Excessive force at that point probably also caused the retaining ring to be malformed.
I had to do quite a bit of filing and burnishing to get the pulley to fit onto the shaft properly(no dragging interfering points) and that removed much of the black oxide. Proper fit is more important here. I will probably apply a thin coat of penetrol when reassembling. It was also slightly rusted at the back end and that required burnishing it away(sandpaper and finger). Most of the pitting was to the pulley and very little on the shaft.
[ATTACH]14521[/ATTACH]
Finally the set screw was a serrated cup with a nylon plug. It will have blue locktite added when reassembled. One of the rings was deformed(as received) and will be replaced as well as the bearings.
[ATTACH]14518[/ATTACH]
The pulley sets in the middle between the snap rings and the bearings go on each end and are stopped/positioned by the rings.
[ATTACH]14519[/ATTACH]
Not easy to see, but notice the tapered flat on the aux shaft end is aligned with the flat for the poly-v pulley. The set screw should always align with the tapered shaft. If it doesn't it has drifted.
In this pix you can see that the pulley drifted in line with the shaft to the point of the set screw riding into the end of the flat. This caused a burr to form at the end of the flat and made removal from the shaft very difficult. I first tried pulling it off the non-splined end, but gave up on that after about 5/8 inch(it was waaaay to hard to remove).
[ATTACH]14520[/ATTACH]
Here you can see the reason it was waaay too hard to remove. The burr created at the end of the flat was gouging a groove into the inside surface of the pulley. It came off the opposite direction easier(sorta!). Lesson learned - if the pulley position has shifted(a look into the set screw hole will tell the tale or it is up against one of the rings) one must remove the pulley in the opposite direction(towards the splined end).
Notice in this pix also the dings created by the PO in removing the splined end bearing. This shaft was an e-bay acquisition and the bearing was separated when sold. I assume the PO did not have a bearing puller, and snarfed things a bit removing it. Correction:The dings were I now believe due to an unsuccessful attempt to remove the 'rear' bearing. The front bearing was removed, and I now believe the pulley was forced to slide on the shaft while removing the front bearing. Excessive force at that point probably also caused the retaining ring to be malformed.
I had to do quite a bit of filing and burnishing to get the pulley to fit onto the shaft properly(no dragging interfering points) and that removed much of the black oxide. Proper fit is more important here. I will probably apply a thin coat of penetrol when reassembling. It was also slightly rusted at the back end and that required burnishing it away(sandpaper and finger). Most of the pitting was to the pulley and very little on the shaft.
[ATTACH]14521[/ATTACH]
Finally the set screw was a serrated cup with a nylon plug. It will have blue locktite added when reassembled. One of the rings was deformed(as received) and will be replaced as well as the bearings.
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