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02-24-2019, 08:42 PM
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#1 |
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Registered User
Join Date: Sep 2017
Location: Riverton, Manitoba
Posts: 67
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Exactly how to remove rear hubs on 72 C20
I want to take the rear hubs off the 72 C20. Quite rusty. I don't see the 3 screws holding the hub on. Will just the hubs come off or do I have to pull the axles?
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02-24-2019, 09:17 PM
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#2 |
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Senior Member
 
Join Date: Dec 2006
Location: Studio City, Calif.
Posts: 2,883
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Re: Exactly how to remove rear hubs on 72 C20
After you remove the axle you will see the mechanism that holds the hub in place. There is a lock ring, a lock nut and a bearing adjusting nut. This is all from old memory.
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'69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme. |
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02-24-2019, 09:23 PM
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#3 |
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Senior Member
Join Date: Apr 2016
Location: Fairbanks, AK
Posts: 340
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Re: Exactly how to remove rear hubs on 72 C20
OP - are you asking how to remove the brake drum?
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1972 GMC K2500 Super Custom Matt |
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02-24-2019, 09:36 PM
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#4 |
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Registered User
Join Date: Nov 2014
Location: Southwest Kansas
Posts: 306
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Re: Exactly how to remove rear hubs on 72 C20
This is a full floating axle. You have to remove the eight bolts in the middle and pull your axle. With the axle out you will see the lock nut that has to come out to pull the hub. Careful: heavy!!
On a side note: That's one of the reasons why I replaced mine with a newer 14-bolt, more parts, better gears and you don't have to pull the hub to work on the brakes.
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'64 C10 LWB, 283, 5speed '68 C20 LWB, 327, 4speed '69 C20 Custom Camper Longhorn, 350, 4speed '72 C20 Cheyenne Super, 396, TH400 '66 C60, 292, 4speed |
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02-24-2019, 09:51 PM
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#5 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,595
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Re: Exactly how to remove rear hubs on 72 C20
The Dana 60 has the removable drums not the HO52. With the HO52 you have to remove the 8 axle shaft bolts and go in that way
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02-24-2019, 09:53 PM
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#6 |
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Senior Member
Join Date: Apr 2016
Location: Fairbanks, AK
Posts: 340
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Re: Exactly how to remove rear hubs on 72 C20
Yeah I see that now. Didn’t look close enough at the picture.....
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1972 GMC K2500 Super Custom Matt |
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02-25-2019, 01:18 AM
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#7 | |
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Senior Member
Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: Exactly how to remove rear hubs on 72 C20
Quote:
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property"  "Be American, Buy American" 
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02-25-2019, 01:37 AM
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#8 |
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Senior Member
Join Date: Feb 2010
Location: Falls City, Nebraska "100 Miles From Nowhere"
Posts: 2,219
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Re: Exactly how to remove rear hubs on 72 C20
Judging from the condition of that hub and drum on the outside, I wouldn't be a bit surprised that after the axle's pulled and the bearing nuts removed, that drum wont budge. That often requires cutting the heads off the nail pins that hold the shoes in place, and then cutting/or removing the wheel cylinder bolts and using a punch to collapse the shoes enough to remove the drum. The early Full Floaters didn't have adjuster slots in the backing plates, they were in the drums themselves and often served no use at all...A cutting torch to cut springs inside the hole where the wheel cylinder "was" will allow you to collapse the shoes enough to remove the drums...
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Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"
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02-25-2019, 01:39 AM
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#9 |
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At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,237
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Re: Exactly how to remove rear hubs on 72 C20
My 68 C-20 has a Dana 60 with out board drums.
My 99 has inboard drums yet what a pain.
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" That didnt make it any newer " " Dont antique the equipment " |
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02-25-2019, 11:15 AM
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#10 |
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Registered User
Join Date: Sep 2017
Location: Riverton, Manitoba
Posts: 67
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Re: Exactly how to remove rear hubs on 72 C20
Thanks for the info. The joy of working on 3/4 tons. This diff is a non slip. What kind of oil to use?
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02-25-2019, 12:09 PM
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#11 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,595
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Re: Exactly how to remove rear hubs on 72 C20
Gear oil
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02-25-2019, 12:11 PM
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#12 |
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Registered User
Join Date: Sep 2017
Location: Riverton, Manitoba
Posts: 67
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Re: Exactly how to remove rear hubs on 72 C20
The drum come off no problem. Nothing left of the linings. Can't believe the drum is not grooved.
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02-25-2019, 12:13 PM
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#13 |
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Registered User
Join Date: Nov 2014
Location: Southwest Kansas
Posts: 306
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Re: Exactly how to remove rear hubs on 72 C20
That's what I really like to use and it has the additive for limited slip differentials already in it. Or just use a good 80W-90 gear oil and add the limited slip additive.
https://lucasoil.com/products/gear-o...0w-90-gear-oil
__________________
'64 C10 LWB, 283, 5speed '68 C20 LWB, 327, 4speed '69 C20 Custom Camper Longhorn, 350, 4speed '72 C20 Cheyenne Super, 396, TH400 '66 C60, 292, 4speed |
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