I like to tap the end of the puller with a hammer. Sometimes the percussion will make things budge. Also, leave it on all night. The constant pressure doesn't hurt either.
 
RUST BUSTER OR W-D 40 INCASE RUSTED IN SMALL SPOT UNSEEN. CAN'T HURT! ALSO TRY WARMING UP WITH TORCH TO EXPAND PULLY, NOT TO HOT, SO EVERYTHING EXPANDES, JUST ENOUGH IN CASE IT HELPS. JUST LIKE A CAR OR TRUCK ETC, PULLEYS ARE PULLEYS, HELL TO GET OF WHEN YOU WANT THEM TO. GOOD LUCK BOB
 
Hopefully you're not pulling on the rim of the pulley with one of those jaw-type pullers... If you put much more pressure on it you'll shatter the pulley.

Use a bearing separator at the very least so you're pulling against

WD-40= waste of time and perfectly good alcohol
Propane torch = waste of time and perfectly good propane

I've seen some pretty heavy-duty rigs used to pull those front pulleys, using some thick pieces of flat plate, 3/4" all-thread, and a 20-ton bottle jack!

You need to get brave with a REAL torch, oxy-acetylene. Heat the pulley while putting pressure on it with the puller and bearing separator. Don't be afraid to get it red-hot. You'll need a new front seal, but odds are you were going to replace that anyway.
 
...Propane torch = waste of time and perfectly good propane...

I see a lot of guys recommend the propane torch. I find it hard to believe it can put out enough heat to do any sort of expansion, especially on cast!
As a side, I read of one guy that burned three blue propane torch tanks on a wheel casting and they STILL wouldn't come loose. I think the second tank and a half were just wasted gas...
 

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