Posted by soundguy on September 22, 2012 at 17:37:52 from (188.8.131.52):
In Reply to: Soundguy - posted by mikeinfl. on September 22, 2012 at 17:30:09:
the steering gearbox on a naa is near identical to a 00 ag model.. you should be fine using the fo-20 as a guide.
at the bottom of the box if there is a core plug.. lnock it out to access the race. I have seen some boxes that have no plug.. though I think they were later boxes.
in that case.. a welding rod and steady hands and you can weld a bead around the face of the race, low penetration and stay away from an edge so as to not weld the race tot he box.. then it should draw up and fall out.. then you can seat another..
the eyelet holds the lower thrust bearing on so it stays on the worm shaft.. a handfull of grease tends to hold it too.. and / or you can set the thrust beairng inthe race and center the wormshaft in it as well.
past that it is counting doube and single sector teeth to align them and centering ballnut.. if done right you have wheels facing forward taking the same number of turns to turn them each way,a dn they have the same range of motion.. then do the usual.. pack steering box with lube ( i use 00 ep grease ).. ten set to in and other good things.. or at least check it..
adjsut sector backlash first though.. make sure you get a lil preload but not excessive on box top.. etc.
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