Home » Public Forums » GMCnet » Original GM bearing puller tool (Anyone seen it in action?)
| Original GM bearing puller tool [message #344497] |
Mon, 24 June 2019 11:52  |
tmsnyder
Messages: 151
Registered: January 2014
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I've been searching online but can't seem to find any reference to the original GMC specified front wheel bearing puller being used on our motorhomes.
Does anyone use one? Any first hand experience on how well does it work, instructions?
Todd Snyder, Buffalo NY
1976 Eleganza II
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| Re: [GMCnet] Original GM bearing puller tool [message #344525 is a reply to message #344511] |
Mon, 24 June 2019 22:23  |
tmsnyder
Messages: 151
Registered: January 2014
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Thanks Jim,
I was just curious about the original dealer puller shown in the maintenance manual. Pulling the bearing for brake rotors would seem to be a fairly frequent need, as well as just being able to get them off to change the wheel bearings to grease and when they wear out. I'd like a good puller for this, I have the hubs pulled per the maintenance manual. Was hoping to be able to get a puller on there but nothing I have can get behind that inner race. The factory manual shows a puller, but I don't see anyone using it, was wondering if it's any good b/c I have one ordered.
Todd
Todd Snyder, Buffalo NY
1976 Eleganza II
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| Re: [GMCnet] Original GM bearing puller tool [message #344585 is a reply to message #344525] |
Thu, 27 June 2019 07:48 |
tmsnyder
Messages: 151
Registered: January 2014
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Original GM specified puller came in the mail yesterday, it's pretty nice, can't wait to try it but I need to make a little hockey puck for the puller to push upon. Can anyone confirm that the ID of the stock bearings are 1.875"?
Todd Snyder, Buffalo NY
1976 Eleganza II
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| Re: Original GM bearing puller tool [message #344592 is a reply to message #344497] |
Thu, 27 June 2019 10:44 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
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If you are going through the trouble of taking the hubs apart to regrease the bearings, and if the hubs are ok, take the time to get ahold of the dirk drilling tool and drill the knuckle for the zirk. You will also need to drill or grind the bearing spacer between the two bearings to allow for grease to flow from the dirk to the bearings. See the link below for how to use the tool. Service interval calls for regreasing the bearings every 25K miles. Problem is every time you remove the bearings, you do a little more damage to the knuckle, and eventually the bearing races become so loose that they can spin in the knuckle potentially leading to bearing failure. By drilling for the zirk, you will be able to regrease the bearings without (in your lifetime) ever having to remove the knuckles/bearings again. You would simply then have to lift the coach, remove the axle nut from the axle shaft, tap the axle shaft in, and then apply grease to the fitting. By pushing the axle shaft in, the inner seal will no longer be in contact with the seal surface and grease will flow freely. So you flow grease until you see clean grease come out of the seal area. If you do not tap the axle in, the hydraulic pressure of the grease will push the seal out of position, and it will no longer seal from dirt and water. HTH
http://www.gmcmhphotos.com/photos/front-bearing-drill-fixture/p33853-front-wheel-bearing-drill-fixture.html
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: Original GM bearing puller tool [message #345444 is a reply to message #344592] |
Wed, 17 July 2019 07:14 |
tmsnyder
Messages: 151
Registered: January 2014
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Just to follow up on my original question about the factory puller setup. I bought a pair of puller fingers specified in the GMC maintenance manual, they look kind of like paddles on one end. Got the GM spec'd puller as well. Both were on ebay.
Following the procedure in the manual, I pulled the hub assembly with a slide hammer and then attempted to pull the bearings from the hub with the GM specified puller setup.
1st set, I kept missing the inner race on one side, pulled on the cage and ended up bending it, ruined bearing. Once that was moved a little though, I could catch the tiny lip of the inner race and pull it. There was not much there to catch, like maybe 1/16th inch of a ridge. They were bower bearings, grease looked pretty tired, probably due for changing anyway since the previous owner said he knew nothing about changing or greasing any front wheel bearings.
2nd set, I realized that what that puller needed was a BFH. Couple whacks downward on the individual paddles and I was able to push the grease seal out of the way enough catch the lip on both sides. Bolted on the puller, C-clamped it to keep the paddles from spreading as shown in the service manual, hit it with the impact gun and the bearing practically flew off unharmed. Bet it didn't take more than 5 minutes total from me walking into the garage to having the bearing in my hand.
So the answer is, yes, they work quite well once the grease seal is pushed firmly (read BFH) out of the way.
Todd Snyder, Buffalo NY
1976 Eleganza II
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| Re: [GMCnet] Original GM bearing puller tool [message #345486 is a reply to message #345444] |
Wed, 17 July 2019 16:49 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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https://www.gmcrvparts.com/category-s/154.htm
On Wed, Jul 17, 2019 at 5:22 AM Todd Snyder via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Just to follow up on my original question about the factory puller setup.
> I bought a pair of puller fingers specified in the GMC maintenance manual,
> they look kind of like paddles on one end. Got the GM spec'd puller as
> well. Both were on ebay.
>
> Following the procedure in the manual, I pulled the hub assembly with a
> slide hammer and then attempted to pull the bearings from the hub with the
> GM
> specified puller setup.
>
> 1st set, I kept missing the inner race on one side, pulled on the cage and
> ended up bending it, ruined bearing. Once that was moved a little though,
> I could catch the tiny lip of the inner race and pull it. There was not
> much there to catch, like maybe 1/16th inch of a ridge. They were bower
> bearings, grease looked pretty tired, probably due for changing anyway
> since the previous owner said he knew nothing about changing or greasing any
> front wheel bearings.
>
> 2nd set, I realized that what that puller needed was a BFH. Couple whacks
> downward on the individual paddles and I was able to push the grease seal
> out of the way enough catch the lip on both sides. Bolted on the puller,
> C-clamped it to keep the paddles from spreading as shown in the service
> manual, hit it with the impact gun and the bearing practically flew off
> unharmed. Bet it didn't take more than 5 minutes total from me walking
> into
> the garage to having the bearing in my hand.
>
> So the answer is, yes, they work quite well once the grease seal is pushed
> firmly (read BFH) out of the way.
> --
> Todd Snyder, Buffalo NY
> 1976 Eleganza II
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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