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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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Old Apr 10, 2026 | 06:42 PM
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Photographic memory

Years ago, this would have been presumptive, but nearly everybody has a phone with a camera now. I've got all the parts needed to rebuild my rear brakes, I've cleaned the drums up (and painted them to keep them cool in service) I'm replacing the wheel cylinders, hardware, shoes and so on. I've got a vent and bolt along with a rubber flex hose. When I was messing with the flex line after opening the package, I checked the fittings and the lines on the truck are not anywhere factory.

Can somebody take a photo of their rear axle brakes? My truck is an '85 F-350 with dual wheels and the Dana 70HD axle assembly. Mainly I want to see how the flex line attaches and I believe it uses the vent to hold it in place. If need be, I can make my own lines, but I want to see what the factory figured was the best way to route everything. This below is what I want to do away with;




Why a steel line was put in makes me wonder what else I'll find down the road. At least they coiled it for SOME flex.
 
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Old Apr 11, 2026 | 08:41 AM
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Get a new rear brake hose. It will have the proper fitting to attach to the vent and both brake lines. I can verify that from '65 to at least 2012 they are done this way, so I think yours will be as well.
 
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Old Apr 11, 2026 | 09:11 AM
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I think this is fairly standard, here's my 86
 
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Old Apr 11, 2026 | 10:05 AM
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Thanks guys. I found a parts schematic that shows things about like the second response. I've already got a new hose as well as a vent. What threw me is the two openings for the lines to go into the block on the brake hose are different sizes. I can deal with that. The rear axle is a rather rough environment for brake lines and I don't want to build in more trouble that it already has.
 
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Old Apr 11, 2026 | 02:17 PM
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I would think the LMC Truck and have https://www.npdlink.com/?gad_source=...xoCvVcQAvD_BwE

pictures and the parts. If you need. Not sure if Jeff's bronco graveyard has the pieces.
 

Last edited by Max Capacity; Apr 11, 2026 at 02:19 PM.
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Old Apr 12, 2026 | 08:54 AM
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Originally Posted by Ol' Grouch
Thanks guys. I found a parts schematic that shows things about like the second response. I've already got a new hose as well as a vent. What threw me is the two openings for the lines to go into the block on the brake hose are different sizes. I can deal with that. The rear axle is a rather rough environment for brake lines and I don't want to build in more trouble that it already has.
Ford always seemed to do the different line size thing on that tee in the rear. I can't figure out why they did it, but all your lines are 3/16 with standard sized fittings (3/8-24 threads) except that line you are taking about, which is still a 3/16 line, but has a 1/4 OD (7/16-20) fitting. You may be able to find a brass adapter to make a standard 3/16 fitting mate up.
 
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Old Apr 12, 2026 | 09:51 AM
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Originally Posted by Max Capacity
I would think the LMC Truck and have https://www.npdlink.com/?gad_source=...xoCvVcQAvD_BwE

pictures and the parts. If you need. Not sure if Jeff's bronco graveyard has the pieces.

For some reason, most of their listings for an F-250 also are for an F-350. On the brake lines, the F-350 was notably absent. Other parts, such as the hose, they had. The steel lines, they don't. The ones on the truck seem to be in good shape, just oddly routed and I may replace them for a cleaner installation.
 
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Old Apr 12, 2026 | 11:42 AM
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Originally Posted by Ol' Grouch
For some reason, most of their listings for an F-250 also are for an F-350. On the brake lines, the F-350 was notably absent. Other parts, such as the hose, they had. The steel lines, they don't. The ones on the truck seem to be in good shape, just oddly routed and I may replace them for a cleaner installation.
I think you know about the Ni-Cop lines with ends on them in the bin on floor in NAPA, those lines come in different lenght's and are easy to bend. I used them on the front lines on my 86.
 
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Old Apr 12, 2026 | 02:01 PM
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Originally Posted by Max Capacity
I think you know about the Ni-Cop lines with ends on them in the bin on floor in NAPA, those lines come in different lenght's and are easy to bend. I used them on the front lines on my 86.

I'm well aware of premade lines with the ends on them. I've also got a couple of coils of steel brake line as well as a couple of flaring kits. I can hand make a steel brake line up to 50 feet in one tube with no connectors or cuts. At my age, I'm thinking of getting a hydraulic flaring tool as it's getting harder to get the clamps tight enough to make a good flare. Then there's remembering to put the nut on properly before flaring the end.

 
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