removing stump jumper

Bamatonz · Mar 1, 2011

Thanks to this thread and another I removed mine in about half an hour including reading and gathering tools!

I wrapped chain around the straightened blades and placed a bottle jack between the shaft (nut on, turned upside down) and the chain. I pumped the jack until tight and continued to pump until I said to myself ****, this thing isnt going to come off. Sure am glad I decided to pump one more time. BANG! The chain and jack hit the ground. I removed the nut, and slid the stump jumper right off. I replaced the seal, put it back together, and was off to working on my disc. Thanks for the help guys!

bo stidham · Jun 6, 2013

I simply could not loosen the nuts that hold the blades onto the bar, from above. So I attempted to remove the stump jumper. I removed the cotter pin and castle nut, no problem. The splined, tapered shaft had never been removed before. I tried using a sledge hammer and an iron pipe to knock it loose from above through the hole. Pounded on it for good while, to no avail. Was about to give up, then I picked up my steel post driver. Perfect tool for effective removal. It's the right length, just slightly smaller than the hole it sits in plus it has handles on both sides. Me and Dad took turns using the sledge hammer and holding the steel post driver, rotating the stump jumper 180 degrees between turns to remove it from shaft evenly. It was factory tight, with no grease, and we had no torch to heat anything. But eventually, one last turn with the sledge hammer, it finally gave up and fell off.

I will certainly grease both shaft and hole when I put it back together.