Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-15-2003, 08:29 AM   #1
qqq
4 Rivet Member
 
qqq's Avatar
 
Join Date: Dec 2002
Posts: 403
Images: 4
Question why repack the bearings

I was surprised to see that my son's a VolksWagen has the same TiMKEN bearings found on Airstreams...100000 miles & repacking is unheard of at VW. Even their trucks have these wheel bearings & they are not in a sealed housing, just like AS's.
So why do we repack

Hart
__________________

__________________
qqq is offline   Reply With Quote
Old 11-15-2003, 08:39 AM   #2
Rivet Master
 
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
Hopefully there will be audible and tactile feed on a vehicle-loose steering and grinding noise. Most likely you won't get any notice before failure on the trailer. A trailer also sits unused for months/years at a time which doesn't help bearings. Even though they can go that distance tearing them down to repack with fresh grease and an inspection are a very good idea.

John
__________________

__________________
74Argosy24MH is offline   Reply With Quote
Old 11-15-2003, 12:51 PM   #3
Rivet Master
 
53flyingcloud's Avatar
 
1984 29' Sovereign
Savannah , Missouri
Join Date: Apr 2002
Posts: 3,458
Images: 17
Blog Entries: 1
Thumbs up Another point..

Given the age of our group... lol

Seriously, If you'd seen this one poor guy who rolled into the Airstream factory with his TT severally damaged from a wheel bearing seizure..which in turn lead to his tire bursting and, then wrecking havoc to the wheel housing/outer skin ripped back..
Suffice to say, it costed him awhole lot more to repair that damage than what it would've been if he'd just had all the wheel bearings repacked. Heck, he could have even bought all new tires as well and, still been money ahead~!
Just my .02 worth..

ciao
__________________
WBCCI 5292 AIR 807
NEU #64
New England Unit
53flyingcloud is offline   Reply With Quote
Old 11-15-2003, 03:21 PM   #4
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
So why do we repack?


because, when your bearings quit turning all that holds your wheels on is a 1/8" cotter key!

grease is cheap, aluminum is not!

john
__________________
you call them ferrets, i call them weasels.
john hd is offline   Reply With Quote
Old 11-15-2003, 04:56 PM   #5
1 Rivet Member
 
Join Date: Nov 2003
Posts: 8
1) Most trailers have tandem wheel setups. Just look at a trailer with tandem wheels making a sharp turn on pavement and you will be astonished at the force trying to pull the tires off the rims.
If that force can make the lug nuts to unscrew, and it can, it probably can destroy bearings, bearing runs and spindles. No such twisting of the wheels on your car while turning.

You do not need to repack per se, you need to INSPECT the bearings, bearing runs and spindles regularly on a tandem wheel arrangement because they work very hard. However inspected bearings will obviously need repacking.

2) You do not need to dismantle the axle bearings to inspect the brakes on a car while you do need to dismantle them to get access to the brakes on an A/S...again the repacking is a consequence of this inspection, not missing grease.
__________________
freud is offline   Reply With Quote
Old 11-15-2003, 08:02 PM   #6
Rivet Master
 
Tinsel Loaf's Avatar
 
Join Date: Jan 2003
Posts: 790
All of the above reasons apply. If you do freeze your wheel bearings out on the highway you may not be able to tow your trailer to the shop? You might have to repair them right where they seized. Them huge tow rigs could drag it on to a flat trailer I guess.
Heck, save the trouble and repack em, other wise I'll wave as I go by.
__________________
Tinsel Loaf is offline   Reply With Quote
Old 11-15-2003, 08:29 PM   #7
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
straight from the horses mouth...

click on "tech tips" on the linked page below.

just about anything you ever needed to know about bearings but were afraid to ask!

http://www.timken.com/products/bearings/

something in there about great bodily harm if you don't grease regularly....myth perhaps?

john
__________________
you call them ferrets, i call them weasels.
john hd is offline   Reply With Quote
Old 11-15-2003, 10:44 PM   #8
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Re: why repack the bearings

Quote:
Originally posted by qqq
I was surprised to see that my son's a VolksWagen has the same TiMKEN bearings found on Airstreams...100000 miles & repacking is unheard of at VW. Even their trucks have these wheel bearings & they are not in a sealed housing, just like AS's.
So why do we repack

Hart
Several reasons. First, the trailer sits for extended periods, on a grass or dirt surface, and moisture can get into the hub assembly, and cause rust, pitting, and other problems.

Second, after sitting for an extended period, some greases actually start to solidify, and won't do an adequate job of keeping the bearings lubricated. Both these things are also reasons why you change you oil in your car at 3 months or 3,000 miles, because of moisture contamination, and breakdown of the oil additives.
Most other reasons have been touched on by the other posts.


Terry
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 11-16-2003, 12:43 AM   #9
qqq
4 Rivet Member
 
qqq's Avatar
 
Join Date: Dec 2002
Posts: 403
Images: 4
OK, OK, but maybe I should reword my question:

Why don't VW or other trucks & VW or other cars, never ever are advised to repack the exact same bearings as AS's.
They too can sit idle for long periods, haul weight & drive much more miles than the average AS.
Who on this Forum repacks the bearings of his car or truck?

Timken's site states the obvious fact that bearings must be greased, but nowhere do they say it has to be done at regular intervals.

Hartmut
__________________
qqq is offline   Reply With Quote
Old 11-16-2003, 01:32 AM   #10
Retired Moderator
 
john hd's Avatar
 
1992 29' Excella
madison , Wisconsin
Join Date: Aug 2002
Posts: 4,644
Images: 40
Who on this Forum repacks the bearings of his car or truck?

hart,

i used to, until i got my last two trucks. they have sealed cartrige type bearings. run 'em until they self destruct. my '88 silverado made it to 220,000 miles before the driver's side front wheel bearing needed replacement.

about a 250 dollar part! even with my discount!

you have started a pretty good thread here, good discussion about the topic.

at my work all of our trailers have been converted to run gear oil in the wheel bearings. the hubs have clear plastic covers that allow easy verification of the amount of oil in the hub during a walk around. most of our medium duty trucks have this feature on non driven axles too.

i also have a car hauler that has dexter axles, with the grease zerk in the middle of the hub. nice feature, makes repacking easy. however, pumping the hub full of grease makes them run quite warm! almost hot to the touch! unlike my airstream.

the only thing other than the airstream that needs regular repacking is the harley.

john
__________________
you call them ferrets, i call them weasels.
john hd is offline   Reply With Quote
Old 11-16-2003, 01:22 PM   #11
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,193
Quote:
Originally posted by qqq
OK, OK, but maybe I should reword my question:

Why don't VW or other trucks & VW or other cars, never ever are advised to repack the exact same bearings as AS's.
They too can sit idle for long periods, haul weight & drive much more miles than the average AS.
Who on this Forum repacks the bearings of his car or truck?

Timken's site states the obvious fact that bearings must be greased, but nowhere do they say it has to be done at regular intervals.

Hartmut

Every time you do a brake job on a car or light truck, the wheel bearings are supposed to be repacked, if they are non-sealed. Usually that works out to between 30,000 and 45,000 miles, depending on driving conditions. It is part of the brake service package, and is listed on the customer's invoice where I work.
Terry
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 11-16-2003, 02:14 PM   #12
Rivet Master
 
LOST , Hawaii
Join Date: Jun 2002
Posts: 2,193
Quote:
Who on this Forum repacks the bearings of his car or truck?
Me. I also change the lube/fluid in transmissions and drive axles, antifreeze, and flush the brakes. I rather do it at my convenience than deal with not doing it on the side of the road.

Do you change your oil at recommended intervals? Why would you think that it is less important to follow the other PM intervals. All are intended to keep the trailer/car operating as long as possible. The manufacturer is telling you that past this point you are taking a chance on damaging the vehicle if you don't follow our recommendations. During a pm the tech/owner also has the opportunity to do an inspection. You can blow some new grease through it and slap it back together or look at the inside of the tires, axle, bearing, race, brakes, wiring, shocks, etc. It really has to be an attitude of preventative maintenance and it does work if it is done right.

As far as Timken not recommending intervals, you already discovered that the same bearing is used in 2 different applications. Somewhere that same bearing is probably in a machine on a rocker shaft that will never make a complete revolution. It won't need the same maintenance as a wheel bearing so it is better to let the end manufacturer make that call.

John
__________________
74Argosy24MH is offline   Reply With Quote
Old 11-16-2003, 02:27 PM   #13
2 Rivet Member
 
2012 25' FB Flying Cloud
Join Date: Sep 2003
Posts: 73
I remember from years ago when I used to repack the front wheels on my cars I always replaced the seal on the inside of the hub that kept the grease in and dirt out. I also remeber it was important not get the nut too tight so the bearings would over heat and the hub does not have to be filled with grease. How do we figure out the seal needed for the hub on our AS's? Perhaps the seal number is in my AS book.

Phil
__________________
Scaler113 is offline   Reply With Quote
Old 11-16-2003, 03:10 PM   #14
Rivet Master
 
1987 29' Sovereign
Sparta , Tennessee
Join Date: Mar 2003
Posts: 507
Send a message via Yahoo to wingfoot321
qqq,

I inspect my cars & trucks every 30,000 miles or so. Pull wheels, look at surface of needle bearings for breakdown/pitting, check seals for cracks or leakage through back, push new grease into bearings by hand, verify sufficient grease in hub?, tighten to point of resistance & back off slightly. I do my utility trailer the same.

My boat has spring loaded covers with fittings. I fill full with chassis lube ( no room for water) and has worked fine for years.

1987 Airstream purchased this year. Used the car & truck procedure. However, I plan to inspect every year. Wheels run a little warmer due to brake heat, cannot hear bearings grinding, load percentage is somewhat higher, cost of wheel well damage is higher, & not as far along in the learning curve as to adjusting four electric brakes to same drum clearance.

Only bearing problem I have every had is the boat prior to the spring loaded covers.
__________________

__________________
wingfoot321 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wheel Bearing Repack? JaceBeck Axles 24 03-15-2004 08:38 PM
Wheel Bearings for a '74 Overlander AV8 Axles 5 02-03-2004 11:42 AM
Cheap looking bearings from Romania qqq Axles 5 07-07-2003 06:41 AM
Replace Wheel Bearings? Pick Axles 6 02-28-2003 07:30 PM
bearings Dwight Axles 0 01-24-2003 10:58 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.