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Hit a wall removing 420 PTO clutch

1101 Views 15 Replies 8 Participants Last post by  RussKish
I was able to pull the engine out of my 420 tonight (thanks for everyone's advice on the previous belt tension issue). Now, I need to remove the PTO clutch/exhaust system, then intake manifold (in hopes of rebuilding the carb). I was able to remove the PTO armature, then the rotor. I now need to remove the key to get the remaining components of the clutch off so I can access the muffler bolt heads. The key seems pretty stuck in there. Reading other threads, it looks like the first step will be to pick up some penetrating oil tomorrow and get that working. Any other thoughts on tackling this?

Pic attached.


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I learned this trick while trying to remove the flexplate bolts from my truck engine/tranny. There were up in a small space and tight as as all get-out. I had bent one allen-wrench and snapped another until I you-tubed this trick: Place an air chisel on the side of the bolt head and "chisel" for 10 seconds or so. No damage to the heads or bolts and the bolts all came right out.

So similar concept - Get chisel or other solid piece of metal that would allow you to tap on the key with a hammer. Effectively, you're just trying to vibrate the key loose, so many small taps - no large thunks. I would tap on the top of the key and the side of the key. I would not tap inward on the key because that might wedge it. Again - tapping for vibration - not hard enough to disfigure the key or cause other damage to the engine shaft.
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