Marty, if you pulled them together, then you tightened it even further. The outer hub, closest to you, has 3 blank holes and 3 threaded. It is the threaded ones in the outer hub you use so that you "push" the inner part away from this hub towards the engine.
If you used bolts that thread into the inner portion, this won't stop you from pushing the 2 parts away from each other using the outer threaded holes. Put plenty of pressure on the bolts, then tap around the inner part till it begins to loosen.
Thanks Daniel. You made me realize I was trying to pull them together, I was thinking that's how they released, no wonder they didn't come apart.
OR, just let me take that off yours hands. Looks like a lot of trouble for you to have to go through! Synchro engines are hard to come by. The 325431 this engine replaced was used in the Bush Hog JB1 tractor and was 14HP.
Marty, The 3 holes that I have circled in yellow should be threaded and you need to use 3 Gr.8 bolts in those holes. They should thread into the outer part of the flange. Get all 3 touching and then only tighten them a 1/4 turn one each bolt. Each full turn of all 3 bolts lightly tap on the out portion of the pulley and keep tightening and tapping until they come apart. Once you have the 2 separated. you will be able to remove the broken bolts out of the back half of the pulley.
BTW, I need that engine for my JB Bush Hog !! If you should want to trade of sell it.
You boys need to back off there on my engine
I have one AC HB212 with a broken rod that needs an upgrade
Been looking for one for several yrs and this one popped up. Came off a water pump on a Fire Dept brush truck, I'm betting it has like no hours on it
Thank for the advice, maybe I will try it the right way next time around.