As a follow-up, in September of 2017 my 1996 1845c skid steer, with only 1150hrs, had it's Fan Bracket (aka Fan Hub) fail recently (the bearing died and the fan was wobbly). Case parts suppliers will tell you you have to replace the whole assembly ($380). Ebay has a few rusty used stuff for $180. But, the bearing is used on ALL Cummins fan hubs, including Dodge trucks... it's the same exact bearing (and there's a lot of people complaining about them too!). Anyway, I purchased just the bearing from
www.GenosGarage.com for $48 (NSK part# BD35-12AT12DDU8-01). That bearing is THE bearing used in all Cummins Fan Brackets... regardless of engine or vehicle manufacturer.
To do the fix... remove the Fan Bracket, take-out the cir-clip, remove the axial bolt (it's the only bolt in the thing), then place a big socket over the bearing and knock it out (a couple of light hits and it drops out). To replace: freeze the bearing to shrink it, knock it into the bracket with a rubber mallet, put-in the cir-clip, put-in the bolt. The job's done!! Hope this saves you guys $340!!! It did me.