Best way to remove original rubber brake lines from back of hubs? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Drummerboy · 07-12-2017, 05:22 PM

I blew a rear rubber brake hose on my '68. The ones that come off of your hub. Mine are pretty rusted. I have a set of line wrenched. I believe the fitting to be a 5/8". Is it best to saturate them in something Like PB Blaster, some kind of penatrating oil for a few days? I tried to brake one end loose, very gently, and I stopped, as it didn't feel good. If anyone has had any exwwith this time of situationfeel free to chime in please!

berch 69GMC · 07-12-2017, 06:38 PM

I cut mine and slid a box end wrench over the line to get it off.

Drummerboy · 07-12-2017, 07:05 PM

Quote:

Originally Posted by berch 69GMC

I cut mine and slid a box end wrench over the line to get it off.

Didn't think about that. Great idea!

hewittca · 07-12-2017, 08:19 PM

Quote:

Originally Posted by Drummerboy

Didn't think about that. Great idea!

That is a good idea. Use a 6 point! I recently had the same problem but did not go at it with enough patience. One thing lead to another and I eventually found myself replacing the entire set of brake lines!

**Boog** · 07-12-2017, 08:30 PM

Certainly soaking them in some kind of penetrant will help. Bump them a little back and forth and soak them some more can help.

cleszkie · 07-12-2017, 08:33 PM

If the fitting gets stripped with the box-end wrench, you can always pull out the trusty vise grips. You are not reusing the line/fitting, so no need to keep it pretty.

**clay68c10** · 07-12-2017, 08:49 PM

A deep socket will work too, preferably a 6 point

Drummerboy · 07-12-2017, 09:01 PM

What size are the fittings, 5/8's???

Drummerboy · 07-17-2017, 06:09 PM

Well, I just twisted the hard line thats on the back of the rubber line. Looks like I'll be replacing that whole line now. Lucky me....

**AussieinNC** · 07-17-2017, 08:56 PM

Before you order new hard lines...make sure the bleed nipples in your wheel cylinders are able to be opened so you can bleed the brakes...

I am a bit OCD on brakes...if it was mine I would pull the rear drums, then replace the rear brake shoes, cylinders and hard lines...plus the flex line...

Little trick I learned a ling time ago...especially with old brake lines...tighten the nipple on the pipe first, then back it off using lots of spray like WD-40.

Check out LMC link : There are several different cylinders,,,makes sure you get the right ones...

http://www.lmctruck.com/icatalog/cb/full.aspx?Page=144

07-12-2017, 05:22 PM	#1
Drummerboy Registered User Join Date: Dec 2010 Location: Sherwood, Arkansas Posts: 156	Best way to remove original rubber brake lines from back of hubs? I blew a rear rubber brake hose on my '68. The ones that come off of your hub. Mine are pretty rusted. I have a set of line wrenched. I believe the fitting to be a 5/8". Is it best to saturate them in something Like PB Blaster, some kind of penatrating oil for a few days? I tried to brake one end loose, very gently, and I stopped, as it didn't feel good. If anyone has had any exwwith this time of situationfeel free to chime in please! Last edited by Drummerboy; 07-12-2017 at 05:28 PM.

07-12-2017, 06:38 PM	#2
berch 69GMC Registered User Join Date: Jan 2015 Location: Boynton bch, FL Posts: 187	Re: Best way to remove original rubber brake lines from back of hubs? I cut mine and slid a box end wrench over the line to get it off.

07-12-2017, 08:30 PM	#5
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,659	Re: Best way to remove original rubber brake lines from back of hubs? Certainly soaking them in some kind of penetrant will help. Bump them a little back and forth and soak them some more can help. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

07-12-2017, 08:33 PM	#6
cleszkie Registered User Join Date: Feb 2003 Location: Santa Ana, CA Posts: 2,191	Re: Best way to remove original rubber brake lines from back of hubs? If the fitting gets stripped with the box-end wrench, you can always pull out the trusty vise grips. You are not reusing the line/fitting, so no need to keep it pretty.

07-12-2017, 08:49 PM	#7
clay68c10 Senior Member Join Date: Aug 2004 Location: Centennial, CO Posts: 2,995	Re: Best way to remove original rubber brake lines from back of hubs? A deep socket will work too, preferably a 6 point __________________ ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ

07-12-2017, 09:01 PM	#8
Drummerboy Registered User Join Date: Dec 2010 Location: Sherwood, Arkansas Posts: 156	Re: Best way to remove original rubber brake lines from back of hubs? What size are the fittings, 5/8's???

07-17-2017, 06:09 PM	#9
Drummerboy Registered User Join Date: Dec 2010 Location: Sherwood, Arkansas Posts: 156	Re: Best way to remove original rubber brake lines from back of hubs? Well, I just twisted the hard line thats on the back of the rubber line. Looks like I'll be replacing that whole line now. Lucky me....

07-17-2017, 08:56 PM	#10
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,210	Re: Best way to remove original rubber brake lines from back of hubs? Before you order new hard lines...make sure the bleed nipples in your wheel cylinders are able to be opened so you can bleed the brakes... I am a bit OCD on brakes...if it was mine I would pull the rear drums, then replace the rear brake shoes, cylinders and hard lines...plus the flex line... Little trick I learned a ling time ago...especially with old brake lines...tighten the nipple on the pipe first, then back it off using lots of spray like WD-40. Check out LMC link : There are several different cylinders,,,makes sure you get the right ones... http://www.lmctruck.com/icatalog/cb/full.aspx?Page=144



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