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Bearings - brake question; may have goofed up my brake job on 97 Stepside Ranger


nadsab

Well-Known Member
Joined
Sep 14, 2009
Messages
94
City
SE Michigan
Vehicle Year
1997
Transmission
Automatic
Hi there,

I have a problem I am trying to figure what if anything I did wrong on my front disc brake job about a month ago on my 97 Ford Ranger 2.3 liter step side. I replaced the pads, put in a new drivers side disc, bearings inner and outer and inner bearing seal. I don't think there is an outer bearing seal did not put one on anyway. Truck ran just fine for over a month, this morning though…

The problem is, this morning, there was a loud grinding, knocking sound coming out of the front end, and when I took the front drivers side wheel off, the top caliper bolt was gone, came completely off, and the caliper was flopping around, swung completely off the mounting bracket, only the lower bolt was holding the caliper on. Also, the nut that goes on the spindle and on top of the outer bearing and holds the wheel on, managed to get loose, even though the cotter pin and bearing washer were in place, the bearing nut loosened up and there was a big amount of clearance or gap between the outer bearing – and the large washer that goes on top of the outer bearing. I could not figure out how that could happen if the cotter pin and that nut and the cage that goes over the bearing nut were securely on. Anyway, I got a new caliper bolt on there, tightened up the bearing nut, got the truck home and tore it down again, am inspecting the disc, bearings, etc.

Questions are - could the loose caliper cause the bearing nut to go loose?

Second question, I don’t see how that could happen. My inner and outer bearings kit came with these steel cups or rings (called a race?) which are tapered on the ID, the bearings seat right into them, I figured on some discs they are needed, but my previous break job did not seem to have these seperate seats, or cups, inserted or press fitted into the disc id. Do these need to be press fit or tapped into the disc and the bearings ride on them?

If yes, on all discs, or do some discs not need them? because the discs ID's are tapered too, and the bearings ride right on the tapered surface of the ID of the discs, so I thought they were not needed.

If this was the problem, that would explain maybe how there was a big amount of space between the bearing nut and the outer bearing itself because the cups were not taking up the clearance.

If this is the case and the cups do need to be press fit into the discs, could that have caused the caliper bolt to vibrate off?

Thanks for any insights on this one.

As a footnote to this one, both the folks at NAPA and Murrays auto parts tell me that the discs they sell for the ranger already have the races press fit into the disc. They also say that the caliper coming loose might cause the gap and a loose disc, the nut getting loose and maybe an 1/8 inch gap between the bearing and the bearing spacer - nut, but that it was un likely. So it's a really mystery to me, I don't want to put this back together until I find the problem, but the only thing I could think of is that maybe they sold me the wrong sized bearings? Any ideas here? Anyone ever have this happen to them?

Another thing, is there a way if I can find out if I have anti lock brakes? I don't think I do, but when I go to the parts store they all say that this vehicle has anti lock brakes, but how can I tell if I have anti lock brakes? Maybe they sold me bearings for a ranger that has anti locks, but I don't have anti lock brakes and thus is why I got the wrong bearings?

I’ve done my own brake jobs all my life and never had anything like this happen before…
 
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I don't see how a loose caliper could in any way loosen your bearing nut. Did you use a torque wrench on the bearing nut?? That's a pretty critical step because there is a torque process. Whenever I've changed wheel bearings that go inside the brake rotor I have never changed out the inner bearing race. Just the bearing itself. I was too slack to go and have it removed and install a new one. That's just me and I've never had any problems. As far as ABS goes, you should have a harness that comes off your caliper........Well, mine is 4x4 and my hub assembly has a harness coming off of it for ABS. I would assume your ABS set-up would be somewhat similar if you have it. I am by no means an expert but I would guess that your wheel bearing nut was not properly torqued out and possibly you didn't tighten that one caliper bolt good enough. Over the past month it just continually loosened up. Good luck.
 
My two cents

I think but don't know, the disk was loose because it wasn't properly torqued some times spinning the disk and re torquing the nut and then making sure its not loose when your done.
 
Hi Again,

Thanks for advice, I think I may know what happened, does this make sense - I think I used too small of a cotter pin, and there was a lot of slop between the pin and that cap that goes over the bearing nut and prevents it from moving or turning. maybe the bearing nut got loosened because that cap was not preventing the nut from turning or loosening, and the disc started wobbling and that in turn vibrated the caliper bolt off.

Does that sound plausible?
 
Maybe. I don't know dude. I think you should just repack everything and then follow the torquing procedure with a torque wrench. I'm sure that will solve your problems. After inserting the cotter pin splay it open as far as you can so that there is no play in the pin. You should be good to go.
 

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