1984 vacuum disconnect axle diagrams or pics?

[billyrb]

I am putting my rig back together, after a year of being apart.....and I can't figure out this set of steel vacuum lines & endplugs....the steel hoses come from the top of the engine behind the driver-side valve cover, and go down, then split (one set towards the xfer case), and the other goes towards the front axle. It has a mounting bracket on the end with two holes for bolts (one on the bottom, one on the side). The axle has another connector already attached to it with hoses that will connect to the endplug of the steel lines....my question is this: where does the endplug mounting bracket of the steel vacuum lines attach to the jeep? Anyone have a diagram or pics they can post?

[billyrb]

Nothing? No one? Can anyone take a pic of their front axle disconnect and the vacuum lines????

[4DWUDS]

this might help on which line does what. NP229/Dana44/Front Axle Disconnect...Scottie?

[billyrb]

4D, thanks for the reply.....I had read that one a little while ago, but it isn't exactly what I am looking for. Here's what I have, and what I need: the axle vacuum diaphragm is mounted on the axle. From there is a set of rubber vacuum lines that go to a 3-line connection, that is also mounted to the axle. From there, the 3 lines go to another connector that is suppose to mount somewhere, but I can't see where it goes just yet. Then, from that connector, the lines change to steel lines and I have it from there. A simple set of photographs of the underside of someones 84' axle and surrounding lines would do the trick.

[Joe Guilbeau]

Man,

I have just gone thru all of this on my rig, and lets see if I can help you out here.

http://www.ifsja.org/ubb/ultimatebb.php?ubb=get_topic;f=2;t=017395

That will get you started. When you throw the lever inside the cab to 2-Wheel Drive, the vacuum motor on the transfer case should suck in the rod, when in 4-Wheel Drive the vacuum motor on the transfer case should push that rod towards the back of the truck.

There are a lot of adjustments to get her set up ust right, and a lot of play in the old systems, but hey, if I can get it done, then believe me, you can.

I you want, I can go step by step to get you up and running, as I have just spent about 10 hours studying and adjusting mine, and making sure that vacuum exists with a vacuum guage.

Amazing what you can learn with the members help...

[billyrb]

Joe, thanks for the offer, but I have a good understanding of how the system works, and where the vacuum goes / routes. The mighty-vac also helps alot. I am just looking for the mounting location of one of the hardware connections. I have everything hooked up, but can't find the bolt holes for one part. That all, and a pic would be a HUGE help.

[andy d]

uuhmn the brkt for that gizmo mounts somewhere on the drivers head in the back up against the firewall. i think the engine i pulled outta my parts 84 has it still. trouble is its dark and covered in 8" of new fallen snow. it may even be on a exh manifold bolt or a valve cvr bolt. the size of the hole should give you some idea

[billyrb]

Andy, close but not the part I am talking about. The steel lines do connect to the back of the driver head.....then, those lines go down and split in two directions....one set goes to the xfer case, and the other set goes towards the front axle. at the end of the steel lines by the front axle is a part that mounts to the jeep. This is the part I am trying to find the exact mounting location. From this mount area, the vac lines are rubber and connect to another intermediate mount. from that intermediate mount, it goes directly to the vac diaphragm.

[Joe Guilbeau]

How about this diagram, is your mounting part shown here?

http://www.n0kfb.org/homepage/amc/tech/select_drive/vacuum_diagram.htm

Part Number 18 interfaces with the steel lines, and I suppose that your system has a mounting bracket at the end of the steel lines going to the rubber lines, however my 1983 Cherokee doesn't look much like this drawing.

[billyrb]

Joe, we're getting closer! ;) The part I am referring to isn't shown on this diagram, but I can 'splain it.....see where part #17 is? Just below that on the diagram are the words "black and green", then "red" and "yellow" pointing to the rubber ends where they connect to the steel lines. On my rig, between the "red/yellow/black and green" connector and the steel lines, there are two connectors. Each end has a steel plate about 1/8" thick with two holes. Those holes have larger steel screws where they mount to the jeep. One of those ends screws into the top of the axle. The other end that connects to the steel lines is the part I can't find the mounting holes for. It either mounts to the inner fenderwell, the axle, the frame, or the engine. From looking at the screws, I don't think it mounts to the engine. The frame is questionable, but possible. If you lay under the jeep, at the front axle, you'll see the diapragm, and the first mount directly after it. Trace that to the second connector, just at the steel lines and you'll see the part I am referring to. We're getting closer!

[Joe Guilbeau]

My steel lines terminate into a bracket that attaches to the Drivers Side engine mount, and there is a retangular bracket that encloses the three vacuum lines as they go down to the front axle.

This is just underneath and between the No. 1 and No. 3 spark plugs on my AMC 360.

[billyrb]

The motor mount??? That is the ONE place I haven't looked. I'll look at it tonight when I get home. Now, when you looked at it, the bracket on the motor mount goes to another bracket on the axle just before the vac. diaphragm, right?

[Joe Guilbeau]

There is a two piece bracket on the motor mount, the two pieces are held together by one bolt.

One of the pieces mounts to the engine mount via two tabs, each secured by a small bolt, the tabs stick out towards the inside of the drivers side wheel. The second piece of that combo bracket has a single hole at the top, to attach it to the bracket that is mounted on the engine mount. There are three more holes at the bottom of that bracket that the rubber vacuum lines go thru.

The lines continue on to the Front Axle vaxuum shift motor thru a much larger single u-shaped bracket that is mounted to the retaining bolts on the differential itself right next to the Front Axle Vacuum Disconnect Motor.

The two piece brackets that mount on the engine mounts will both fit handily in the palm of your hand, the one piece bracket is about three times a large as the other two pieces.

If you have an e-mail where you are at, I have a scanner and can sketch a quick drawing of the brackets and shoot a .jpg over...

[billyrb]

Joe, that sounds exactly like what I am looking for. Thanks for checking it out. As for the scan, shoot it over to grand_wagoneer@lycos.com

Thanks again!

[krob725]

when i bought mine it was tied on to the motor mount with a piece of wire......still holding! ;)
krob725