After 3 times of replacing the front crankshaft pulley seal and having it still leak I don't know what I'm missing or where to go from here. Someone tell me what is the problem, I didn't see anything wrong with the first seal or wear band other than a small leak, the next one was installed with the new pump using the same wear band because it was is slick as glass, it leaked also, #3 this time the seal came with a new wear band which I didn't change because the old one was as good as the new one, checked the seal fit to the pulley it was good also there weren't any burrs or nicks on the pulley, installed the new seal same as before lubed it good and the pulley wear band as well, installed the pulley same as before now it leaks worse than before, when I could just see any oil I shut it down remove the pulley dust shield ran my finger along the outer edge of the seal where it mates up to the pump it was dry all the way around except at the very bottom, the best I could tell the oil is coming out between the seal lip and the pulley shaft ???????? what am I missing?
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rustred
Well-known Member
if I was doing it and there was a new wear sleeve with the seal I would be replacing both. plus need to use a sealant on the wear sleeve. plus make sure the wear sleeve is installed correctly. and are these seals genuine ihc or other reputable seal and not Chinese junk. stupid question... but the seal is installed the right way and not backwards? need to ask questions as no pictures or visual on the subject.
Are you installing the new seal flush with pump using a good flat plate so as to not distort the seal. You can, on some pumps, install seal slightly farther in but you need a plate that fits snug in counter bore or you will distort seal. Never use any tool that is chamfered on edge. Next, they have been known to leak past the key way in the crankshaft and that is what that springy washer (actually a seal) is on the crank shaft for so is that washer in good condition. Also, sometimes the key in the crankshaft will want to move with pulley and slightly distort the pulley. Hard to detect if only slight. I always heat the pulley in boiling hot water to make them go on easier but never heat in oven or with torch.
Of course, excessive play in crank bearings.
Of course, excessive play in crank bearings.
Just to add a little more information. Originally, these engines did not have that sealing washer when first introduced in the 66 series tractors. It is not the same as the larger oil slinger washer that was common on almost all older model engines. It is a very narrow washer and technically should be replaced with a new one every time pulley is removed. We had a lot of new engines leaking and that sealing washer was a improvement IH came up with.
rustred
Well-known Member
if I was doing it and there was a new wear sleeve with the seal I would be replacing both. plus need to use a sealant on the wear sleeve. plus make sure the wear sleeve is installed correctly. and are these seals genuine ihc or other reputable seal and not Chinese junk. stupid question... but the seal is installed the right way and not backwards? need to ask questions as no pictures or visual on the subject.
Janicholson
Well-known Member
Welcome Back, We missed you!!! Jim
The first one was an IH brand the next 2 were national, it's not leaking from the key way there is no oil between the heavy washer held on with 3 bolts and the end of the crank, I can't see any oil leaking anywhere except where the seal lip runs on the wear sleeve , seals have been installed in the correct direction flush to the oil pump and a the reason I did not change the wear sleeve was the old one was as good as the new one there isn't a groove or scratch on it, this assembly has a thin washer between the pulley and the oil pump drive spline is there suppose to be anything else in there? I know this sounds crazy, but is it possible for the oil pump to pressurize the cavity between the pump and seal to the point it would cause it to leak without blowing the seal out? I've seen a couple automatic transmissions blow the front pump shaft seal, just wondering
the tractor vet
Well-known Member
I was going to chime in but listen to Pete as he is like me and old timer I H wrench . Ya need to have the correct tools for the job and like Pete said how bad are your main bearings if that crank is floppen around you will never get a seal to hold.
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