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A/C hose and Bead Lock Fittings

MikeC5 on Tue September 08, 2009 9:27 PM User is offlineView users profile

I recently bought some new barrier hose and the appropriate (steel) beadlock fittings. A little test fit up showed that the BL fittings are an easy sliding fit into the hose and the BL's are the same OD as hose ID (with a few thou). This is in stark contrast to installing hose on R-12 fittings which use a larger barb diameter and much effort is required to get the hoses on. As far as I can tell from reading the specs, crimping tools use the same dies to crimp either type of hose-fitting combination. I was under the impression that the ferrules used were not different for R-12 vs. R-134 hoses. Am I missing something here? I understand that it is important for the inner barrier hose liner to stay intact but I was surprised at the lack of interference fit.

TRB on Tue September 08, 2009 9:41 PM User is offlineView users profile

Barrier and bead-lock need a bubble style crimp. Old style R12 crimps is a poor choice for bead-lock and barrier hose.

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Probedude on Tue September 08, 2009 11:43 PM User is offline

Mike,
I'm about to place an order for fittings and hose. I've already got the Mastercool crimper. Will post a followup when I do mine.

MikeC5 on Wed September 09, 2009 5:58 AM User is offlineView users profile

Some further searching and reading on my part and I now see what you mean TRB. I'll have to make sure my local crimp guy has the correct stuff.

MikeC5 on Wed September 09, 2009 8:26 AM User is offlineView users profile

I would be interested in seeing how it goes Probedude.

Probedude on Tue November 03, 2009 1:10 AM User is offline

Mike,
Long wait but I finally bought some fittings and hose and got them today.
Same as what you experienced, the #8 hose and #8 beadlock fittings are quite loose. I can feel the beads interfering as I insert it into the hose, but not by much.

In other news, looks like I bought the wrong fittings as my OEM evaporator on my Geo Metro must use metric fittings. The high pressure fitting too is smaller than a #6 female o-ring fitting as it won't even accept the straight bare tubing of a #6 fitting.

MikeC5 on Wed November 04, 2009 7:21 AM User is offlineView users profile

I went ahead and had the hoses properly crimped by a local shop and have had good results so far. Before installation I pressure tested them underwater to look for leaks and after installation (with new o-rings) they pass the vacuum test easily (holds 29 + for an hour). This weekend I plan to install the new drier and charge! (crossed fingers)...

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