Bearing Replacement with dry ice ? - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-07-2014, 09:54 AM   #1
Senior Member
 
Name: Jack L
Trailer: Bigfoot B-17 CB
Washington
Posts: 1,226
Bearing Replacement with dry ice ?

I was getting ready for a long trip (Utah rally Moab ) and thought I would repack the wheel bearings. Good thing I did because one of the outer bearings was not good.

I'll probably replace all bearings and races in both wheels. A good friend with lots of mechanical experience was telling me how he replaced races in hubs with liquid propane. Just freeze the race with liquid propane and it will shrink enough to just fall into the hub. Now I've read that heating the hub to expand it and putting the race in the freezer for 2 hours make it smaller will make installation easier so I might try that but I was thinking of getting a small block of dry ice and freezing the races to aid in installation. If anyone has any experience with replacing bearing races I would like some advise. I've watched a few videos and it looks pretty simple but I would hate to damage a new bearing race.

I'm sure glad I found this problem when I had the trailer in the driveway instead of the highway.

Jack
__________________

__________________
Jack L is offline   Reply With Quote
Old 04-07-2014, 10:00 AM   #2
Senior Member
 
Bob Miller's Avatar
 
Name: Bob
Trailer: 1973 Hunter Compact II
California
Posts: 7,912
I use the freezer method when needed, but I also wrap the race in a wet rag and freeze that as well, usually overnight. That way I don't have to be in a hurry when installing.

Dealing with dry ice sounds like to much extra work.
__________________

__________________
Bob Miller is offline   Reply With Quote
Old 04-07-2014, 10:16 AM   #3
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
It's called sledging. I have frozen a socket to get a stuck spark plug out. Get the engine hot and use the cold socket to get the plug out. The head is hot and expanded and the frozen socket transfers enough cold to the plug to shrink it enough for it to break
loose.
__________________
Darwin Maring is offline   Reply With Quote
Old 04-07-2014, 10:54 AM   #4
Moderator
 
Name: RogerDat
Trailer: 77 Scamp 13
Michigan
Posts: 3,081
I used to work in a motorcycle shop and to replace valve guides the guides went between blocks of dry ice and the head went into a counter top toaster oven.

Take each guide off the ice as ready to install. But then we had a store with dry ice a couple of blocks away.

Like bearing race the guides have to go in true and with the head warmed a guides coming off dry ice they went in slicker than snot off a glass door knob.

As a side note we have used dry ice to pack frozen meat for camping, meat gets own cooler. Extra insulation provided by news paper. Less mess, lasts about 4 days. Used when we had larger family group to take all the chicken, or ribs or... dang I'm making myself hungry for grilling.
__________________
RogerDat is offline   Reply With Quote
Old 04-07-2014, 12:08 PM   #5
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
Omaha Steaks ship their product in very thick styrofoam coolers with dry ice.
Dry ice is frozen carbon dioxide so be careful what you put it in and if you have it in a sealed tight egg. 160 Degrees below 0
__________________
Darwin Maring is offline   Reply With Quote
Old 04-07-2014, 06:08 PM   #6
Junior Member
 
Trailer: Snoozy
Florida
Posts: 18
Use liquid nitrogen at work on a regular basis for shrinking large bushings, works very well. Usually do the math to know that there is going to be enough "shrink" to work.
__________________
Jim W is offline   Reply With Quote
Old 04-08-2014, 07:46 AM   #7
Senior Member
 
Trailer: Bigfoot
Manitoba
Posts: 604
Works like a charm. My experience: 1/2 of BMW bike engine block in oven at 200F (wife was away) and bearing race in freezer. Previously too big to fit; dropped right in. Careful with liquid propane or nitrogen, I'd stick with the freezer.
__________________
Cam A is offline   Reply With Quote
Old 04-09-2014, 06:41 AM   #8
Senior Member
 
Jared J's Avatar
 
Name: Jared
Trailer: 1984 19' scamp
Kansas
Posts: 1,610
Bearing Replacement with dry ice ?

I've done the freezer trick before, but never for wheel bearing cups. They've always pressed in or went right in with a driver.

It's also quite rare that they need changed.

It's getting picky, but the whole thing is the cup, the race is the surface the rollers run on.
__________________
Jared J is offline   Reply With Quote
Old 04-09-2014, 10:07 AM   #9
Senior Member
 
Name: Jack L
Trailer: Bigfoot B-17 CB
Washington
Posts: 1,226
Well, I got the job done. It was pretty easy after I solved the initial problem. What happened was that I ordered a kit online when I bought new tires about a year ago. The kit contained new races that were .030 larger than the old ones. The old and new bearings were the same part number so I'm thinking the kit had the wrong races. A trip to the local auto parts store for the correct size and it was easy from there.
__________________

__________________
Jack L 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
Ice ice baby - an alternative to traditional a/c or hocus pocus? glamourpets Modifications, Alterations and Updates 24 02-02-2013 09:38 AM
MAKING A DRY SHOWER IN A CASITA gary g Modifications, Alterations and Updates 8 09-11-2010 01:13 PM
Dry Camping: Fresh Water Sources and Dump Stations diannas Problem Solving | Owners Helping Owners 6 04-13-2009 05:34 PM
How do you keep the toilet area dry? Sandra L Plumbing | Systems and Fixtures 14 11-19-2008 12:48 PM
Trials and Tribulations: Dry campng with our Solar Panel peterh General Chat 52 11-09-2008 06:56 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 02:35 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.