I have ALMOST managed to strip down my 14" SB 45. I have been stuck trying to break down the rear roller for more than a day. The drive side half of the roller was relatively easy to remove. However, the non-drive side has been a problem. I have tried to remove the bearings, but they have not budged. I even soaked them in degreaser overnight. So I reverted to removing the pawl holder to attack it from that side. My problem is that I have not been able to remove the woodruffe key. I have attempted all the various suggestions in the Bonnar Bible without any luck. All I appear to be doing in messing up the key. Would it be worth trying to drill or grind out the key? Your suggestions appreciated. Regards Foles
Celebrating 50 years of mowing lawns with my Scott Bonnar 45s
I've never had any issues removing one. Worst case scenario is place a pin punch along the shaft and resting it against the tip of the key, then strike sharply and it should fly out after one blow.
Have a second operator watch where it ends up flying off to as that's rather helpful and that way you can re-use it again and not have to purchase another one.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
I guess I've never had to resort to such measures as a sharp blow with a larger pin punch or smaller cold chisel has always gotten them out in a flash.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
Yep I've had a few stuck keys,when you give them a sharp blow on the end it just damages the end of the key until there's no end to get a punch or chisel onto and then the side cutters cut the sides out trying to lever the key out and then there are the keys that have broken flush with the keyway and hitting the key on each end does nothing to move the key.
Most times the keys are removed easily it's just some keys won't move no matter how hard you hammer them with a pin punch or chisel.
Problem with hammering the key it expands the key making it stick harder. As long as the key is stuck in the shaft you can use a 1mm cutoff wheel in a grinder and split the key down the middle and it will fall out. Not so easy if the key is stuck in the boss
Due to the position of the key, and not being able to move the roller (as I could not remove the bearing), it was difficult to get to the key properly. I first started drilling out the key in the hope that I could break the key. It did not break. So I ended up using a Dremel tool to grind the woodruff key flat with the shaft. That enabled me to remove the remaining half of the roller, and eventually (with considerable effort) to remove the bearing. I then went back with the Dremel and ground out the remaining part of the key. The photo shows part of the key that I extracted and the keyway. It looks as though there is not too much damage to the shaft. Just need to order new key.
Regards Foles
Celebrating 50 years of mowing lawns with my Scott Bonnar 45s
