Leaking 1971 K20 front hubs - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68K20 · 04-08-2007, 03:08 PM

Good morning. One of the locking hubs on my truck started leaking recently, but I am having a bit of a problem locating the seals to fix the issue. Does anybody have a source or part numbers for the inner (metal?) outer, and o-rings, for the blue dial 1971-1972 K20 (large) hubs? Thanks.

Burt4x4 · 04-09-2007, 10:30 AM

Sounds like you may want to buy a set of Warn Prem. hubs and be done....You may not find the rebuild parts your looking for...aftermarket...

cobinder · 04-09-2007, 09:21 PM

does your hubs look like this?

msgross · 04-09-2007, 09:30 PM

are these closed knuckle or open? If they are open then i'm trying to figure out what oil you could be leaking...If closed then I say change to open...

68K20 · 04-10-2007, 12:17 AM

The axle is open knuckle off of a 1971-1972. I meant to note that the hubs are the external type, and they are leaking around the base seal (metal gasket), which is where the white ends in the pic. I took a closer look at the hubs and noticed that almost all of the bolt flange areas on both hubs is cracked... I have attached pics, but it is a moot point, I have orderd a set of Warn 9072 off of ebay for cheap :-) Here is a pic of the current hubs, for those that are curious.

Pic of New...

msgross · 04-10-2007, 07:30 AM

those will be nice...

Southedisto · 04-10-2007, 07:36 AM

That looks like grease that has thinned out and is seaping out around the lockout.

68K20 · 04-10-2007, 08:55 AM

Quote:

Originally Posted by Southedisto

That looks like grease that has thinned out and is seaping out around the lockout.

I was thinking the same thing, but after seeing the cracks (PO must have tried to "fix" the leak by cranking the bolts down) I decided to just pull the trigger on the warns (they were like 76.00 with shipping brand new

) I figured the warns would be cheaper and easier than trying to rebuild the old ones. I am going to keep the original hubs just in case I ever decide to go back to them.

On a side note, do I need to repack the bearings when I replace the hubs? They bearings were just repacked (I bought it from a friend who gave me all the receipts) before I got the truck in Dec. And if so, what all does that entail, special tools and what not?

Burt4x4 · 04-10-2007, 12:56 PM

No, you don't 'need to' pack the wheelbearings when swaping the hubs..two seporate componets and independent of eachother.
You do need a few tools to service the wheelbearings...if you have never done it before you would want to get a service manual or a knowledgeable buddy to show you how to service them properly..if you doit wrong bad things will happen to the wheelbearings..like turning them to multant lava if they are too tight...speaking from experiance..I learned the hardway..by makeing ALL the mistakes first and then learning from them

68K20 · 04-10-2007, 07:38 PM

Quote:

Originally Posted by Burt4x4

No, you don't 'need to' pack the wheelbearings when swaping the hubs..two seporate componets and independent of eachother.
You do need a few tools to service the wheelbearings...if you have never done it before you would want to get a service manual or a knowledgeable buddy to show you how to service them properly..if you doit wrong bad things will happen to the wheelbearings..like turning them to multant lava if they are too tight...speaking from experiance..I learned the hardway..by makeing ALL the mistakes first and then learning from them

That is good to know,

I was not wanting to have to tear the front end completely apart. Anything special I need to know before installing the warns?

msgross · 04-10-2007, 08:06 PM

don't overtighten the outer cap, might need a good set of lock ring pliers. pretty easy to change really.

**Ridgeback** · 04-11-2007, 12:31 AM

68K20:

If you are going to get rid of the old lock out hubs after you replace them I would be interested. Thanks.

04-08-2007, 03:08 PM	#1
68K20 Noobie McNoobster Join Date: Nov 2006 Location: SoAZ Posts: 68	Leaking 1971 K20 front hubs Good morning. One of the locking hubs on my truck started leaking recently, but I am having a bit of a problem locating the seals to fix the issue. Does anybody have a source or part numbers for the inner (metal?) outer, and o-rings, for the blue dial 1971-1972 K20 (large) hubs? Thanks. __________________ The Stable: 1968 Chevy K20 w/tilt, working AM/FM, AC and 350/350/205 w/Disk Brakes 1990 Chevy V2500 Suburban 2005 Kawi KLR650 1983 Honda Goldwing GL1100 Standard (Naked) 1995 Miata M Fortes Fortuna adiuvat

04-09-2007, 10:30 AM	#2
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: Leaking 1971 K20 front hubs Sounds like you may want to buy a set of Warn Prem. hubs and be done....You may not find the rebuild parts your looking for...aftermarket... __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

04-09-2007, 09:21 PM	#3
cobinder Everything is work in progress Join Date: Apr 2006 Location: Denver Colorado Posts: 326	Re: Leaking 1971 K20 front hubs does your hubs look like this? Attached Images __________________ Good luck with your truck! How much?! It's just an old truck part!! 49 International on a 80 GMC 3/4ton 4x4 chassis 48 International KB-5 2 ton dump bed 04 Honda CRF "500" 09 Honda CRF450 fuel injected rocket 03 Suzuki hayabusa carbonfiber wheeled monster. 02 Ford diesel stretch van (toy hauler) 01 38' Monaco diesel pusher motorhome

04-09-2007, 09:30 PM	#4
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Leaking 1971 K20 front hubs are these closed knuckle or open? If they are open then i'm trying to figure out what oil you could be leaking...If closed then I say change to open... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

04-10-2007, 12:17 AM	#5
68K20 Noobie McNoobster Join Date: Nov 2006 Location: SoAZ Posts: 68	Re: Leaking 1971 K20 front hubs The axle is open knuckle off of a 1971-1972. I meant to note that the hubs are the external type, and they are leaking around the base seal (metal gasket), which is where the white ends in the pic. I took a closer look at the hubs and noticed that almost all of the bolt flange areas on both hubs is cracked... I have attached pics, but it is a moot point, I have orderd a set of Warn 9072 off of ebay for cheap :-) Here is a pic of the current hubs, for those that are curious. Pic of New... __________________ The Stable: 1968 Chevy K20 w/tilt, working AM/FM, AC and 350/350/205 w/Disk Brakes 1990 Chevy V2500 Suburban 2005 Kawi KLR650 1983 Honda Goldwing GL1100 Standard (Naked) 1995 Miata M Fortes Fortuna adiuvat Last edited by 68K20; 04-10-2007 at 12:22 AM.

04-10-2007, 07:30 AM	#6
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Leaking 1971 K20 front hubs those will be nice... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

04-10-2007, 07:36 AM	#7
Southedisto River life...... Join Date: Oct 2005 Location: Soldotna AK Posts: 1,078	Re: Leaking 1971 K20 front hubs That looks like grease that has thinned out and is seaping out around the lockout. __________________ I like wheelin in Dixie!

04-10-2007, 12:56 PM	#9
Burt4x4 Registered User Join Date: Feb 2000 Location: Modesto, CA Posts: 1,842	Re: Leaking 1971 K20 front hubs No, you don't 'need to' pack the wheelbearings when swaping the hubs..two seporate componets and independent of eachother. You do need a few tools to service the wheelbearings...if you have never done it before you would want to get a service manual or a knowledgeable buddy to show you how to service them properly..if you doit wrong bad things will happen to the wheelbearings..like turning them to multant lava if they are too tight...speaking from experiance..I learned the hardway..by makeing ALL the mistakes first and then learning from them __________________ 1972 K5 MPFI454/Sm465/Np205/D60/14FFd/Re-Centerd H1s w/Swamper Iroks

04-10-2007, 08:06 PM	#11
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: Leaking 1971 K20 front hubs don't overtighten the outer cap, might need a good set of lock ring pliers. pretty easy to change really. __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

04-11-2007, 12:31 AM	#12
Ridgeback Senior Member Join Date: Mar 2003 Location: Virginia Posts: 809	Re: Leaking 1971 K20 front hubs 68K20: If you are going to get rid of the old lock out hubs after you replace them I would be interested. Thanks. Last edited by Ridgeback; 04-12-2007 at 12:21 AM.



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