it's real easy to break that $80 dollar part. Man, was it easy to break. So be sure you really, really DO wanta take that arm off. I don't have the same model, but looking at the drawings they look similar, infact they may be the same. I'm gonna give you some links of drawings and part numbers and photos. Unfortunatly the site with good drawings doesn't have good photos and vice versa. And my computer doesn't like sites like that and right now I am having probs looking at my model to see if they are the same part. Unfortunately no one has a photo or good drawing of the spray arm.nor a photo of just the part that is holding it. That part only seems to be available as part of a $80 kit.
The best drawing is http://www.partselect.com/ModelFrame...E&Type=&Mark=1
The best photo (not very good) is http://www.appliancepartspros.com/Appliance-Parts/ge-support-assembly-item-number-ap2039814.asp
On the diagram we're lookin at assembly 553 specifically part 550. Its the cylindrical thing on the far left of the photo. See that tab sticking up into the hole? Its got a tab at the top sticking inwards that goes over the top of a ring or lip around the bottom of the tube on the spray arm. There's another one diametrically opposite. If you look in the dishwasher you should be able to see it, the opening is towards the front I think, repeat I THINK,
you can carefully hold those tabs out and pull the arm off. Try a couple of Popsicle sticks as levers and a third hand to lift the arm. The tabs are beveled on top so the arm should snap back down, but some gentle spreading might help. Be easy with it, no tugging, or poking or twisting with pliers. I didn't even know the first tab was broken until I went to put the arm back on. Without the tabs the arm trys to go into orbit.
In the diagram you'll see screw 509, which seems to hold assembly 563 and part 550. But I dunno how you get to it down through that telecope and all. I never saw it in real life. And back then didn't know about all the diagrams and manuals on line. Couldn't find you a repair manual, sorry.
Hopefully a real expert will see your question and tell us how to get that screw out, so wait a while B4 trying it my way
. I sure hope sumbudy sees it or else I'll have to tell you how I fixed it with a plastc jar lid, dividers, utility knife Xacto knife dremel tool and words I didn't even know I knew plus some I invented..
Or you could call GE's 800 number and ask for tech support, that's how I found out how much the part cost. I already had the tools and needed an excuse to eat a whole big jar of cashews to get the lid, Please sumbudy that knows what their talkin about help mrserinmc.