Combination Valve

[Thomas792]

I've searched and seen a bit of discussion but nothing that answers my question.

I really hate to post this but I need help identifying my combo valve. I replaced the calipers on my 88 Grand Wagoneer yesterday and bled the brakes without using the combo tool. Brakes work but are not as firm as I would like. With the engine on and supplying vacuum the pedal goes down considerably far, almost to the floor.

I've looked in my 82 manual (I have a 76 and 82 manual and see no reason to buy an 88 manual as the parts seem to have not changed) but cannot identify my combo valve. It looks like a chunk of cast iron with minimal machining to cut threads and square up some of the surfaces. I would say it is a Type-D combo valve but it has a piece on the bottom about 2 inches long that is part of the cast assembly. At the end of this "extra" piece it looks like there is a recessed grease zerk with a rubber boot over part of it.

My question is, is this an 88 version of the 82 Type-D Combo Valve? If this is in fact a Type-D Combo Valve then pushing it in will allow me to bleed the brake and get a nice firm pedal, right?

[tkiller13]

this should help you

http://oljeep.com/edge_brakes.html

[Thomas792]

Thanks for the link. Those pictures look the same as my 1982 service manual. My combination valve looks the same except that it has a 2 inch projection below the rear brake input line. It is part of the whole body of the valve and it looks like it has a recessed grease zerk.

[Skeeter74]

My rear brakes were so far out of adjustment that they were, for all intents and purposes, not working. After adjusting them, my brakes were very nice and the wag stopped great, until the right rear wheel cylinder blew a seal. Just more proof that the rear brakes had not been working.
As an aside, I think most people would be amazed at how many cars on the road today are operating on front brakes alone do to lack of adjustment on the rears.