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View Full Version : repacking beariings -- guidance on bearing wear needed


strad
04-17-2013, 10:52 PM
Still catching up on maintenance left from the po. The bearing was adjusted correctly and had no unusual noises before I pulled it apart. I have worked on this type of bearing setup before, but it's been about 20 years hehe, and I don't remember much. I do have evidence of water intrusion in the grease (dunno how long it has been in there -- longer than I've had it anyways). There is no evidence of corrosion on any of the bearing surfaces. I knocked the old seal out, got both inner and outer bearings nice and clean, cleaned up the races and the axle. Now I don't know what to look for on the bearings themselves for wear. The races look fine -- no discoloration anywhere, same with the axle. The bearings are somewhat "loose" in that I can move the cage that holds the rollers up and down somewhat relative to the inner part of the bearing. I don't see anything unusual on any of the rollers -- they look the same all the way around top to bottom.

This is a VM single-axle trailer, no trailer brakes, with a bearing buddy axle. In case that helps. Also, how do I go about ordering a seal? Do I reference the part number on the hub (Unique Functional products H-1377)? Is that enough for a trailer parts store?

GoneBoatN
04-18-2013, 01:08 AM
Maybe you can figure out the seal by matching up to the part numbers of the bearing cups and cones listed in the chart on page 2 of http://www.ufpnet.com/Portals/0/PDFs/Bearings&Seals.PDF

If you can't determine it from that then maybe contact UFP. See their contact info at http://www.ufpnet.com/ContactUs/tabid/60/Default.aspx.

GoneBoatN
04-18-2013, 01:16 AM
From http://www.etrailer.com/faq-wheelbearingpack.aspx (see picture at this page).

The easiest way to find a replacement is to find the numbers stamped in the rubber part of the seal.

But often times the number is not there or too hard to read.

If it were me and I did not know about the age or prior maintenance of the bearings, I would most likely just replace them as it is not that much money for a whole new set of cups/cones/seals. However what you described did not sound bad to me. Note that the URL above also has information about inspecting the bearings and etc.

jafo9
04-18-2013, 08:52 AM
i'd change them all out. my mc trailer has the oil bath, but all my other trailers have the grease packed hubs. i've found that you can usually order a kit from a place like e-trailer or one of the other online places. the kits are usually pretty cheap and its nice to know you are riding on fresh hubs. over the years i've collected a few specific tools that haven't cost me a ton of money but have let me do probably a dozen or so hubs on cars and trailers. one of the most useful tools is a brass drift to beat out the races and seals. a seal puller helps. i also picked up a 12 ton press from harbor freight along with a race press kit which is basically a set of soft brass cones to help press in the races. i've probably got less than $200 invested in this set up and it has easily paid for itself after just a few press jobs. i also bought one of those cheap autozone bearing greasers that hooks up to your grease gun. much easier than the old fashioned way of using your palm to push the grease through. good luck.

strad
04-18-2013, 02:58 PM
Well I had the trailer store guy look at them while I was getting the seals. He thinks they're fine as well. So at least for that side of the trailer I am good to go. I'll put that side back together then do the other side.

GoneBoatN
04-18-2013, 04:57 PM
Well I had the trailer store guy look at them while I was getting the seals. He thinks they're fine as well. So at least for that side of the trailer I am good to go. I'll put that side back together then do the other side.

So you figured out the size of the seals?

strad
04-18-2013, 05:19 PM
Well sorta! I brought it into my local specialty trailer store, handed it to the guy, and he was back in a jiffy with a match! It's nice to live in a city where at least some people know what they are doing!

thatsmrmastercraft
04-18-2013, 05:22 PM
Well sorta! I brought it into my local specialty trailer store, handed it to the guy, and he was back in a jiffy with a match! It's nice to live in a city where at least some people know what they are doing!

Good parts guys are almost a thing of the past.

strad
04-18-2013, 05:50 PM
Good parts guys are almost a thing of the past.

Yeah, and when you find one it makes your day! And I got to drive the strip coming back. I haven't been there in I don't know how long. You know it's been awhile when you're looking up and saying "wow, when did they build that?!" I'm local so I never go down there lol.

thatsmrmastercraft
04-18-2013, 05:53 PM
Yeah, and when you find one it makes your day! And I got to drive the strip coming back. I haven't been there in I don't know how long. You know it's been awhile when you're looking up and saying "wow, when did they build that?!" I'm local so I never go down there lol.

My son live there but he normally comes here to visit and get his fix behind out boat. The strip is an amazing place. Is there any place other than Mead to hit the water out there?

strad
04-18-2013, 06:48 PM
Lake mead is the closest. Twenty five minutes from my house. Havasu is not far. Lake Powell is about six hours away.

thatsmrmastercraft
04-18-2013, 06:55 PM
Lake mead is the closest. Twenty five minutes from my house. Havasu is not far. Lake Powell is about six hours away.

Sounds like you are pretty well set.

mtajpa
04-18-2013, 09:20 PM
Well I had the trailer store guy look at them while I was getting the seals. He thinks they're fine as well. So at least for that side of the trailer I am good to go. I'll put that side back together then do the other side.

Strad
Make sure he gave you double lipped seals. Some of the trailer shops have single lipped seals that will let water in. Here is a link of what the double lipped seal looks like.

http://www.etrailer.com/Seals-for-Trailer-Bearings/Dexter/168255TB.html?feed=npn&gclid=CJ2n3qrH1bYCFSjZQgodlkYAmw

You going out this weekend?

strad
04-19-2013, 12:14 AM
Yeah he gave me double lipped ones. Probably going out. I just got a ski trainer for my son so thought I'd either go out or find a swimming pool and pull him around in it. my brother in law has a swimming pool but not sure of the temp! probably no warmer than the lake! Are you going out?

oh, and edit: I'm not 100% sure if they are double lipped. They are exactly like the old ones (not that the last person in there knew what he/she was doing lol) and there are two lips, but the lips are different heights, with the inner one being a little taller (and more compressible) than the outer one.

GoneBoatN
04-19-2013, 02:07 PM
Yeah, and when you find one it makes your day! And I got to drive the strip coming back. I haven't been there in I don't know how long. You know it's been awhile when you're looking up and saying "wow, when did they build that?!" I'm local so I never go down there lol.

I use to visit the area 3-4x per year on business. I never cared for the strip but stayed in hotel rooms there because they were generally nicer than off strip. Always hated having to cross the smoke filled casinos on the way in/out of the hotel. Then typically my company has held one or more of their conferences there yearly and people from work always want to frequent the smoke filled casinos - not my scene at all.

Sounds like to me that you got double-lip. Always nice to be able to confirm the part numbers though.

mtajpa
04-19-2013, 07:08 PM
Yeah he gave me double lipped ones. Probably going out. I just got a ski trainer for my son so thought I'd either go out or find a swimming pool and pull him around in it. my brother in law has a swimming pool but not sure of the temp! probably no warmer than the lake! Are you going out?

oh, and edit: I'm not 100% sure if they are double lipped. They are exactly like the old ones (not that the last person in there knew what he/she was doing lol) and there are two lips, but the lips are different heights, with the inner one being a little taller (and more compressible) than the outer one.

Probably be out Sunday AM until about 2PM I be around Sandy Cove part of the time. Or look for me in Rotary Cove. I'll keep an eye out for ya.

strad
04-19-2013, 09:16 PM
Red and white with a red tower? I'll be looking.

Edit: that's funny I cruise past sandy cove all the time -- hadn't had a chance to learn what it was called though! And Rotary is the next one in line or so. Sandy cove is where everybody gets lined up, right?