When did double crimp brake hoses become required?

[Paul B.]

Hi,
I seem to remember someone telling me that in 1967 double crimps became mandatory for brake hoses? Can anyone confirm this for me?

Thanks,

Paul

[Paul B.]

Re: When did double crimp brake hoses become required?

Anyone? I know until at least '65 single crimp was OK.

Paul

[Greg L.]

Re: When did double crimp brake hoses become required?

Paul do you mean the double flare at the end of the lines? I seem to recall an old automotive book my Dad had from the fifties referencing the double flare so I would assume that they were used at least as far back as that.

To be honest I just assumed that the double flare would have been used from about the time hydraulic brakes were first used in the late 30s or early 40s.

Now I'm curious too.

[Mike M.]

Re: When did double crimp brake hoses become required?

Paul,
your memory has served you well.
'67 was the first year.
'66's still had the single crimp.
HaND

[Duke W.]

Re: When did double crimp brake hoses become required?

The first hydraulic brake systems were early 1920s, and I believe double flares on the pipes were used from the beginning.

Duke

[Mike M.]

Re: When did double crimp brake hoses become required?

Oh, I forgot to mention that judging procedures consider safety issues, hence, the earlier cars that have the current double crimps on the front hoses should not suffer an originality deduction, probably just a notation.
HaND

[Paul B.]

Re: When did double crimp brake hoses become required?

Thanks guys. I was referring to the crimping of the fitting to the end of a rubber brake hose. I knew that it had become a safety requirement to have a double crimp, but I just wasn't positive if '67was the first year.

All the best,

Paul

[Mark D.]

Re: When did double crimp brake hoses become required?

Just a matter of opinion I believe this hose, which I would refer to as a single crimp, would be the assembly line hose (at least for the fronts) for 1967 and up to at least 72. The part number is verified in the 1969 A. I. M.



Regards,

Mark

[Greg L.]

Re: When did double crimp brake hoses become required?

That's interesting Mark.

I didn't want to say anything because 67 was supposed to be the first year of the double crimp but my original 69 hose's crimps look just like your's with only the one crimp.

[Mark D.]

Re: When did double crimp brake hoses become required?

Anyone have a 67 or any other AIM through 72? Check the part number on the front brake hose. 3898231?

[Greg L.]

Re: When did double crimp brake hoses become required?

69 AIM shows a 3898231.

[Terry M.]

Re: When did double crimp brake hoses become required?

1970 AIM shows 3898231 - UPC5, Sheet B1 for the fronts

[Alan S.]

Re: When did double crimp brake hoses become required?

The 71 AIM still calls for 3898231.
Regards,
Alan

[Chuck S.]

Re: When did double crimp brake hoses become required?

I started to comment on this question very early, but then thought better of it...No insult intended, Paul, but I've been "sand-bagged" by enough academic midyear trivia questions.

When the questioner asks, when DID the "double crimp" on brake hoses become standard, immediately the question is begged...Is this some kind of implied "mid-year" speak that all midyear people understand? What the **** is a "double-crimp"?...Does that mean the "crimp" is twice as wide as before?...Maybe, it's crimped twice on the same area, only twice as hard the second time?

I assumed, as you did, Gregster, that the question related to the double flaring method used on brake lines forever, and discussed in Chassis Service Manuals since before midyears. Sometimes, it's better to let old hounds snooze on the porch, Gregster.

[Howard W.]

Re: When did double crimp brake hoses become required?

67 AIM Front 3898231 and rear 3878958

Howard