Crankshaft Pulley...NOW WHAT??!!

[Dale Finch]

I've about given up on this darn pulley!!
First I tried to remove it with a bearing splitter and puller..no luck...just bent a 5" Grade 8 bolt.

So I ordered a Pulley Puller rig from Earl, which I picked up at the Bash this past weekend. Tried it, and managed to bend another bolt trying to keep it square.

Took it home, drilled another set of holes for a third all-thread to (hopefully) stabilize it better. Tried again, and still it wouldn't budge.

So this morning, with help from the shop owner, William, we heated that sucker up to red, tried it again, and the only thing we accomplished this time was to bend the plate behind the pulley. That pulley didn't move 1 millimeter!!!

So my question is, now what?! A thicker backing plate and a bigger bottle jack? I have two other larger jacks, a 6- and 20-ton. Any suggestions? Is there anyone in the Chapel Hill area who has done this and might be able to help?

Just a side note, we were able to easily pull the pulley off my parts engine, so we at least had the set-up correct. This one just won't budge. And we already checked for any set screw. The ONLY difference between the two pulleys is this ridge that runs along the side of the pulley which the other one does not have, but it does not look like anything that would keep it from coming off.

(WHY DO SOME PHOTOS GET TURNED SIDEWAYS?? Sorry about that!)

[John *.?-!.* cub owner]

You might try using a shorter bolt to push against, then move to a longer one when it moves. That will make it easier to keep straight. also grade 5 or 8 is best.

[Dale Finch]

I already went from a 5" to a 4" Grade 8 yesterday, understanding that it would reduce the chance of bending, but that one still bent. Today, at least the 3" Grade 8 bolt did not bend, but the rest of the rig DID!!

[Super A]

Tighten the puller down TIGHT and then get a BFH and whack the heck out of the "neck" of the pulley, close to the engine block. Just a couple of good, sharp blows. With all the pulling apparatus, you may have to get a big punch--I used a 3/4" piece of cold roll steel.

Al

[Dale Finch]

get a BFH and whack the heck out of the pulley

Now that sounds like a good way to get it off AND take out my frustrations!!!

[tst]

Look through the dirt and make sure some one in its past life did not weld it on to the crankshaft, seen that a few times

[tenn terry t]

I had one just like that I I beat , pulled , and heated on. I happened to run my fingers around the bottom side of the pulley towards the ground and felt something . someone had added a allen head set screw to the pulley. I dug the dirt out of the set screw loosened it up and the pulley bout fell off in my hands

[Dale Finch]

I had one just like that I I beat , pulled , and heated on. I happened to run my fingers around the bottom side of the pulley towards the ground and felt something . someone had added a allen head set screw to the pulley. I dug the dirt out of the set screw loosened it up and the pulley bout fell off in my hands

I will check it again for a set screw (now that all my pretty paint has been burned off!!). I did double check to make sure it wasn't welded to the crankshaft. Took the weekend off to let my frustrations wane.

Instead of tackling it, I went to the farm and did about 3 hours of mowing on one cub, scrubbed him down, then 3 more hoirs on another one!! Very good seat time. Now I will be ready to tackle that d@#n pulley again...probably Tuesday afternoon.

[Bezirk]

I would heat it again Dale if you determine that it does not have a set screw. If you recall the one we removed at DSCF was rather stubborn and I think we heated it two or three times before it finally came off.

Berlin

[Super A]

I would heat it again Dale if you determine that it does not have a set screw. If you recall the one we removed at DSCF was rather stubborn and I think we heated it two or three times before it finally came off.

Berlin

Seriously, BFH, right on the hub. Don't hold back. Couple good sharp blows will knock it loose....

Al

[brichter]

Seems that you have reached the "nothing left to lose" point. At times, I have had to heat couplings and pulleys red hot and then flood it with water, cooling it just as rapidly as you can. Most of the time, it will relieve itself and come off. Worth a try. Check again for a weld or a set screw. My crew had to pull a wheel off a boxcar once and we had to heat and cool it several times but it finally came off with a monstrous jack and backing plate. Anyway try the heat and cool method. Good luck.

[SONNY]

My pulley came off and went thru the fan!----the allen head set screw came loose on it! thanks; sonny

[Dale Finch]

Mowed another few hours today with my cub, so now have enough energy to tackle this thing once and for all. Tomorrow afternoon is the day for victory...one way or another!! The good news is that I do have a spare pulley, just in case. The bad news is that if I do break it, I STILL have to get it off!!!

I will certainly double check for welds and set screws, but have confidence that heat and a BFH will be my friends!

To be continued!!

[Dale Finch]

OK! Wanted to give you an update, and will also ask a few questions.

First, with added confidence from you guys, I bought new, longer all-thread, and using a larger bottle jack, I was successful in getting the pulley off!! I didn't even have to heat it anymore. So I am not sure whether it was the previous heating, the larger bottle jack or both.

That was the good news...the bad news was that after removal, the pulley was found to be cracked at the hub. Not the belt area, but the furthest aft area. I am not sure whether it was already cracked or I did it during removal. At least I have the pulley off my parts engine I can use, so hopefully this will go back together fairly quickly.

The damaged area of the pulley did gouge a couple areas on the crankshaft. Can this be filed down then polished until it is smooth? If there are grooves from this damage, can/must they be filled and if so, what material do you suggest I use?

I can't figure out just what made the gouges (and possibly caused the pulley to jam then crack)...in the above photo, you can see 3 "tracks" inside the pulley. The center one does match where a crack is, but the one on the left does not. It almost seems like when the pulley was installed, there was some foreign matter that was caught inside while driving the pulley on. Opinions?

Because of the heating the oil smelled slightly burned. I drained the oil, and now wonder if I should use something to clean the areas that I have access to now that the engine cover is off? Carb cleaner sprayed around?

Is there anything I need to check while the cover is off? I think the governor may have slid forward enough to disengage the gear...is it similar to the Cub as far as a timing punch mark? I will check the Service Manual tomorrow, but thought I would throw this out for suggestions along with the update.

Thanks everyone for your input!

[Dale Finch]

The "new" pulley is now sandblasted and primed, slong with the engine cover (after flattening the bolt hole areas). It will probably be next week before I get back to this...work to be done at the farm!

Maybe that will give you guys a chance to answer some of my questions above so that I can button this puppy up, like how I need to prep that crankshaft with the gouges??

Thanks and have a good weekend!