Dana 27 Bake Lines

I have a 46 CJ2a with a dana 27 and offset flanged 44; the problem is that I don't have any hardlines or hoses for the front axle braking system. I've been searching on line to find a diagram of how these are installed on the early CJ5's and I can't find anything that gives me confidence on what I need to route the lines/hoses/brackets.

Would anybody be able to post pictures of the front brake lines of their D27? I'm hoping I can use CJ5 parts on the 2A to make it work, but not 100% sure.

 

There are basically two variations in how the brake lines were run. Earlier civilian Jeeps up through CJ3A had the front hard brake lines attached to the axle which connected to short hoses to the wheels with that connection shielded by a guard bolted to the king pin cap. Beginning with CJ3B Jeeps there were longer flex lines from the frame to the wheels on the front with the hard line routed along the crossmember under the radiator.

Military Jeeps up through the M38A1 all had the earlier design with the front line attached to the axle.

There was less variation on the rear axles, with all having the hard line attached to the axle.

The axles you have are not original to a 46 CJ2A so probably are CJ5 axles. Regardless of that, routing the front brake lines can be done either of the two ways I described. I prefer the later design which puts the cross over brake line in a more protected area than on top of the axle. You would need to add tabs to the frame to mount the long wheel hose connections to the hard lines.

I think Walcks has pictures, and they carry a wider assortment of brake line kits. If you call them they can give you some guidance on what you need. I recommend buying a pre-bent kit from Walcks over bending your own, but that is up to you.

 

Thanks! I was able to find some more information this morning on a disc brake write-up and saw where the mounting tabs are for the flex hose.

I took a look at Walcks, I think they have everything I need for the later early cj5's. my last question is to figure out the brake line from the master cylinder; I don't see a T-fitting in the brake line kit, I guess I'll have to buy that separate. Does that T-fitting get mounted to the frame?

 

stock 2A master cylinder.

 

Here's the factory setup with 10" brakes on a Dana 27 in my '69 CJ5.

Left. Tab is on the bottom of the frame slightly forward of the axle:


Right. Tab is on the side of the frame slightly behind the axle:


The "S" bend tubes are available and the hoses are the same part number on both sides.

 

great pictures, they really help. My dana 27 has the 10" brakes too. Maybe it's the angle of the pictures but your wheel cylinder fittings look perpendicular to the backplate? The ones that are on mine are angled back, like they would be pointing to the transfercase.

My next task is to figure out how to take off the 3-ring Warn hubs.

 

I'm not sure where the change from the frame to axle single flex hose to the frame directly to wheel cylinders occurred, but my 55 3B most definitely had the earlier arrangement with hard lines on the axle and short hoses to the cylinders.

 

I don't know either but the only CJ3B I ever owned had the later setup with long flex lines from the frame on both sides. I bought that old 3B over 30 years ago for parts, it didn't have a title and I don't have a clue what year it was. I just pulled off usuable parts and cut it up for scrap.

 

On the '69 the line coming out of the wheel cylinder angles to the back on the left side and angles to the front on the right side. The wheel cylinders, "Z" pipes, brackets, and hoses are the same part on both sides. The Z pipe takes the angled port of the wheel cylinder and makes it perpendicular to the wheel where the hose attaches.

Most cars have mirror images wheel cylinders with the both ports angled to the front or back like yours but Jeep did it differently.

I think some very late 1971 Jeeps had a one-piece hose direct to the wheel cylinder and have the cylinders configured like yours. You may have a very late '71 axle or the cylinders have been changed somewhere along the way. I'm not sure there are any replacement hoses available for that one-part-year setup but 72 and up hoses for 11" brakes might work. My May built 1971 is the same as my '69 with the Z pipes.

 

I don't. I'll put that on the list.

Waiting for parts to come in at this point. Ordered from Walcks last week, hopefully they ship soon.