Got a b riggs 25hp, I have the engine out and need to replace the crankcase gasket. I cannot get the crankshaft pulley off to save my life. I rented a heavy duty 3 arm puller and it just bent the pulley it was that stuck, i've sprayed it, used heat, I don't know what else to do it's rusted on. Does anyone have any advice I need to get this thing going asap-thanks
srey the heck out of it with pb blaster or other top rated product. I once had the same situation and sprayed the pulley really good. The next morning when I got to work, the pulley was lying on the ground under the machine.
#3
reynoldston
I would say if nothing else works split it with a cut off wheel. You don't want to put a lot of heat on the crankshaft. Are you sure nothing is holding this pulley on? I know before I asked about a bolt holding it on and you said no bolt. It just seem something must hold this pulley on unless it is pressed on. You also must remember the new one has to back on. Like jeff said some penetrating oil overnight and they usually come right off.
#4
reynoldston
You said that you bent the pully where you pulled on it. What are you pushing on in the center?
There is no bolt for sure I checked very well, I was thinking it was either pressed on or just rusted so bad it's almost welded, I did have the pulley on the center, the metal just isn't that strong and it's on there so tight it just bent it, I tried several times. I am going to keep lubing until until this weekend when I get my air compressor wired up and take the cut off wheel to it, so much for a simple small oil leak lol
Are you sure there is no set screw either deep in the grouve of the pully or on the hub.? sometimes they are hard to see when filled with dirt/pieces of belt?or anything? the diagram sort of looks like maybe a keyway on the crankshaft
I have used an air chisel with success on one of those stuck on pulleys. Just remember that you must be very carefull not to damage the crankshaft.
#8
reddragon
you can buy dry ice for $10...or regular ice....id soak it with the pb blaster....and immerse it in ice for 30 minutes..maybe an hour....the metals will contract and give you a huge advantage :smile:
Push it off with a couple of grade 8 nuts and bolts. Use metal under to spread out the load. It may take two or more different lengths to get it off. This Power King clutch took four different lenghts to get it off.
Look really good for set screws in the grooves, and if you find one, check for a second one down in the hole!
Thanks everyone for the input, there is no set screw I looked really good, I have it soaking in pb blaster right now, I also know someone with a setiline torch which may be an option, I will have to post some pics
