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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2005 Posts: 15 Junior Member | | Junior Member Joined: Feb 2005 Posts: 15 | Well, I purchased all new wheel and master cylinders, hoses, and a "universal line kit", for my '54 1/2T pickup. I'm ready to start but noticed that some of the old lines were smaller. The kit(some 20 pieces, not all to be used) has only 1/4" lines. I checked the shop manual and it says all the lines should be 3/16 on the 1/2 ton, except the crossover from the MC to the passenger side connector, and the "rear axle cross pipe". Well there are 2 pipes needed for the rear axle and does it make sense that a 3/16" line would feed 2 1/4" lines on the rear axle? In checking other suppliers, it looks like many supply all 1/4" unless you request smaller ones. Do I just go with all 1/4"??? Can any one shed some light? I would be much obliged!! | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Yes, two different diameter brake lines were used on a 1/2 ton truck in 1954. If no one posts photos or details about the lines by Saturday, I will do so. | | | | | Joined: Feb 2005 Posts: 15 Junior Member | | Junior Member Joined: Feb 2005 Posts: 15 | Thanks for your reply. Is that a definite "no, will not work" on using all 1/4" lines? I have the assembly manual, and if the info in the shop manual is right then I just need to buy some 3/16" lines. (and return the kit) | | | | | Joined: Feb 2005 Posts: 15 Junior Member | | Junior Member Joined: Feb 2005 Posts: 15 | Thanks Robin58. Is that how you kept them? and do they work fine? I'm wondering how critical the sizing really is? (I would think that a 1/4" line makes sense if it feeds more than one 3/16" lines.) But logic doesn't seem to apply, and I know nothing about hydraulic priciples! | | | | | Joined: Dec 2005 Posts: 324 Member | | Member Joined: Dec 2005 Posts: 324 | in a full hydraulic system the size of the lines should not make noticeable difference in brake action.
"It ain't a truck if you can't hose out the cab."
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