1973 - 1978 GMC Motorhome Rear Wheel Bearings - Repack or Replace with Andrew
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- เผยแพร่เมื่อ 7 ก.ค. 2024
- The factory service manual calls for repacking the rear wheel bearings every 24,000 miles. Despite this, my coach had 55,000 miles before I got it back on the road and the drums appeared to never had been taken off.
I apologize in advance for not making it clear in the video - you DO NOT need to hammer out the bearing cups/races if you are only repacking the bearings. The only thing you will need to do for a "repack job" is remove the wheel seal to gain access to the inner wheel bearing. The bearing cups are one-time use only, so if you hammered them out I strongly urge you to replace your complete bearing assembly with new.
It is paramount on this project to work clean and to use a brass or bronze drift when servicing the bearings. You need a material that is softer than the cast metal of the brake drum or damage will occur!
In hindsight, my bearings were not worn out and repacking them would have been fine. However, I installed new TIMKEN bearings and have no regrets. Combined with the ultra high-tech Redline Oils CV2 synthetic grease, I do not have any plans to pack or replace them until atleast 100,000 miles. The new grease is much better than what was available in the 1970's.
If you are only repacking your bearings, this is a fun job that costs under $50 to do completely right. You will just need the cleaning supplies, (4) new wheel seals and two tubs of grease. I recommend buying (6) seals... one extra in case you botch the job and one more extra as backup to keep in your coach emergency parts bin.
The wheel seal part number is 21771 and is very common, available in stock at most auto parts stores. There is discussion online about some seals "failing" a .25" measurement test but I had no problems. Do your own research on that. - ยานยนต์และพาหนะ
Good back yard mechanic skills. You're sharing info that makes for better men and a better country..
Thank you John. Means alot brother.
Thanks Andrew, about front bearings and balljoints, tour are the best teacher ever. Cant beleive I have done the rear end already.
Thanks again
Im not sure when I will attack my front end. It feels tight on the highway and bearing seem good. Going to leave ‘er be for now!
Andrew. Another excellent video. Thanks for taking the time to share your knowledge and skill.
Thank you for watching!
Dude keep the videos coming you’re a legend for making these awesome tutorials
Thank you!!
Definitely a legend for these videos
Just a final watch before I perform the whole operation myself. The tone changes when fully seated
Another great video, Andrew. Lookin' forward to the Onan generator one. Think my CCK 5.0 is headed for a rebuild.
Adrew- Thanks for all the great videos!!!
I am now looking at the parking brake and I world like to see you going thru the evaluation and ajustement. Before replacing any part I want to know if good or not. Maybe a video on this subject would help a lot of guys like me. Thanks for the good work
Thanks for another great video
Thank you for watching!
Nice work, brings back memories of old school mechanicals
The GMC motorhome will make you a man! Lol
Great job, thanks for the video!
Are you gonna do the front wheel bearing on a video? That would really be great!
What is the part number for the first, inner Timken bearing? I recommended holding the products right up to the camera to precisely show the part numbers. I got the LM501310 inner cup, 15243 outer cup, 15103 outer bearing. Is the inner bearing the same part number as the outer one? Are the parts the same for all six wheels or just the rear four? And are both wheel seals the same part number? When are you driving to southern California to work on my GMC?!?!
Hi Jeff, sorry the part number did not get included. The wheel seal is the same on all four rear wheels! The part numbers are as follows:
LM501310 inner cup
LM501349 inner bearing
15243 outer cup
15103 outer bearing
So. Cal would be an epic trip! Probably next year, LOL
Hey Andrew, are you part of the gmc forums? Need to know how to communicate with you? I’m going to be going through my gas tanks on my gmc motorhome as well.