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27 fan pulley
Posted: Tue Aug 20, 2019 11:59 am
by Inthegarage
The fan pulley has about 3/16th in and out play on it. I just rebuilt it last winter with all new and fitted parts. I would like to remove it to find out what’s going on. Can I sneak the pulley by the radiator without removing the return neck? Or do I have to drain the antifreeze and remove everything?
Thanks
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 12:16 pm
by Scott C.
On my 26, I was able to sneak it out of there.
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 12:31 pm
by Mark Gregush
Before you take it off. Have you tried tightening the thru bolt first? Also look at your fan belt, is one edge more worn then the other indicating something is out of alignment. Could be that if the belt is too tight it is pulling the pulley in one direction wearing the bushing flange faster then it should. Flat belts do not need as much tension as a V belt, just enough to turn the fan (and water pump if so equipped). Another check before taking it off, are the pulleys in alignment both vertical and horizontal?
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 12:42 pm
by Inthegarage
Mark Gregush wrote: ↑Tue Aug 20, 2019 12:31 pm
Before you take it off. Have you tried tightening the thru bolt first? Also look at your fan belt, is one edge more worn then the other indicating something is out of alignment. Could be that if the belt is too tight it is pulling the pulley in one direction wearing the bushing flange faster then it should. Flat belts do not need as much tension as a V belt, just enough to turn the fan (and water pump if so equipped). Another check before taking it off, are the pulleys in alignment both vertical and horizontal?
I did check the tension of the belt and it’s not tight at all. If the thru bolt was loose wouldn’t the belt be out of adjustment?
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 1:00 pm
by jab35
I haven't attempted that on my '26, but removing the eccentric with the fan assembly might require less 'space' than removing the bolt and fan from the eccentric. Taking the fan blade off the hub first should give more room too, but removing those 4 machine screws and the gasket on the blade presents it's own challenges I expect. The end play in a '26-'27 fan hub is minimal if the felt seal isn't totally worn away. Best, jb
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 1:34 pm
by Humblej
John, did you install the felt seal and cup washer? If not that would account for about 3/16" play.
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 3:02 pm
by Inthegarage
Humblej wrote: ↑Tue Aug 20, 2019 1:34 pm
John, did you install the felt seal and cup washer? If not that would account for about 3/16" play.
Yes I did. But I think you should be able see it. I didn’t look with a flashlight yet, should you be able to see cup washer?
Later lm going to check the adjustment nut just to make sure it didn’t loosen up You gotta check the easy stuff first.
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 4:57 pm
by RajoRacer
Yes, the cup washer should be visible - if not & you're seeing brass, that's the bushing !
Re: 27 fan pulley
Posted: Tue Aug 20, 2019 5:41 pm
by Inthegarage
I checked the adjusting bolt and it’s tight. So tomorrow’s job it’s off with the fan
