Posted 2022-03-21 8:43 PM (#620382) Subject: What size is the tubing/fitting going into a 56 Mopar Coaxial Steering Box?
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I am lining up the ducks for a new, belt-driven (not generator driven) PS pump (a Ramcharger 4 x 4 style Saginaw pump) and will need to have a new hose made to mate the metric fitting on the pump
to the SAE fitting on the Coaxial steering box (see photo below).
I am hoping that my NOS parts guy might come through with a new (or used) OE 56 Dodge PS hose but so far no luck.
In lieu of that, any ideas what the fitting is at the coaxial box (probably a double flared tube but I don't know what the thread is going to be on the tubing nut).
The tubing nut seems to be 11/16" (ish). An 11/16" open end wrench fits over the nut but seems a bit loose. A 5/8" wrench will NOT fit on.
The tubing seems to be about 1/4" (17/64") O.D. if that helps.
Any ideas (confirmation?) ??
(I don't want to break this hose loose or cannabalize it - yet )
Posted 2022-03-21 9:22 PM (#620384 - in reply to #620382) Subject: Re: What size is the tubing/fitting going into a 56 Mopar Coaxial Steering Box?
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Location: So. Cal
I'm pretty sure it was a double flare fitting just like you make with brake lines. I am away from home until Saturday so I can't check my '56 Fury power box for you until then. Chrysler used similar connections on their later '60's radiator cooler lines.
Posted 2022-03-21 11:27 PM (#620391 - in reply to #620384) Subject: Re: What size is the tubing/fitting going into a 56 Mopar Coaxial Steering Box?
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Powerflite - 2022-03-21 6:22 PM
I'm pretty sure it was a double flare fitting just like you make with brake lines. I am away from home until Saturday so I can't check my '56 Fury power box for you until then.
That will be great.
Just tried a flare nut wrench on the fitting on the coaxial steering box. 11/16" goes on, but seems too loose (i.e. it will round off the points on the nut). In contrast, I can't get the 5/8" end of the flare nut wrench on the fitting. I will try again tomorrow. Has to be 5/8". (???)
Posted 2022-03-28 1:41 AM (#620526 - in reply to #620391) Subject: Re: What size is the tubing/fitting going into a 56 Mopar Coaxial Steering Box?
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56D500boy - 2022-03-21 8:27 PM Just tried a flare nut wrench on the fitting on the coaxial steering box. 11/16" goes on, but seems too loose (i.e. it will round off the points on the nut). In contrast, I can't get the 5/8" end of the flare nut wrench on the fitting. I will try again tomorrow. Has to be 5/8". (???)
I tried again a couple of times. Same answer: 11/16 flare is loose and 5/8 seems impossible. I might try a crows foot (??)
Nathan found out that he didn't have the hose that he thought he had. (Thanks for trying Nathan).
Posted 2022-03-28 3:40 AM (#620528 - in reply to #620382) Subject: Re: What size is the tubing/fitting going into a 56 Mopar Coaxial Steering Box?
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Posts: 9679
Location: So. Cal
My '57-'58 cars use a 5/8" wrench on the nut. I'm not sure what is causing it not to fit, but it may be that it is deformed a little. You could try a 16mm, which is a little bigger to see if that works. But it should take a 5/8" if it were in good shape.