Jd 350 crawler

[dennisg]

Anybody know where to find bolt hole locations schematic on front crossbar hole. All bolt where either broken and welded or no bolt at all Weld all crack most of hole are wobble out. Track unit completely remove from dozer. On rear crossbar worn area. Could shim stock be use to take up slack. On rear mount block for crossbar mount to crawler. Book show 2- differ part ## what was screw in where of differ grade

[Jim B]

Are you looking for a "blueprint of the track frame that would show all the hole locations and thread sizes? If so, that would be something you would have to ask your JD dealer if they can get it from John Deere.

Between finding some of the old holes and the holes in the crossbar you will most likely have to locate the holes yourself to restore them.

I would use weld build up and grinding to fit before shims for the rear crossbar area. If you want to shim it, the shims likely will need to be welded in to stay there.

The 3/4-10 cap screws that mount the rear crossbar brackets to the crawler housings are grade 8 according to the parts catalog, if that is what you are asking.

[dennisg]

Look for input from best here. Jd 350 dozer rear crossbar has wear where support mount also on both end . Do some weld built a grind.1 would 7018 rod work for weld both bar and end housing . Read somewhere here about using 6013. 2. Cut off hitch plate and machine a heavy sleeve and slide over bar and weld hitch plate to it . Seem this would allow bar to rotate or be rotated . Add 2- grease fitting on each housing roughly 1” from both end housing.This would for better grease job for bar . Sorry for long story. Machinist always look to make thing better and not come back to do more repair..

[Jim B]

I am going to say what you use for weld filler wire depends on the welding equipment you are using and the base metal. 70 series rod or filler wire is my normal choice. Some may be using 6013, or 6011 as it will run easier if they aren't good at welding or have AC machines. As you say you are a machinist, I would expect you can best decide for yourself what works for you with the welding equipment you use. I think most service manuals refer to using 7018.

I have to believe the rear bar is intended to be a solid mount where the bar brackets mount to the steering clutch housings. If you look at the front cross bar it rigidly mounts between the crawler's frame rails and track frames. There is no need for the rear bar to rotate, so no grease fittings are needed or wanted. Build it up (and the housing mounts if needed) to have a tight, clamped fit. The track frame mounts should slide on the ends of the bar with a little clearance. The 450B service manual gives specs for the diameter dimensions of the rear cross shaft and the track carrier frame bushings that ride on it. I expect there are similar specifications in your 350 service manual you should refer to: to guide your buildup of components.

[Kolot]

I just did mine, removed both track frames, mine were stripped out and broken also. I welded up the holes in the track frames and bored them back out, however I upsized mine to 7/8" grade 8 bolts. Now as for the cross bar, my holes were all wallowed out and oval shaped. I machined some aluminum round stock I think around .910 diameter and I then located those in the holes of the crossbar and filled weld all around those, the aluminum wont bond so I was able to knock them out after the welding leaving me with a decent bore compared to what I had. Center drill the aluminum slugs before you put them in, that way even if you have to drill them back out the drill will be centered and the aluminum bores easy. On the inside of the cross bar I also machine washers for the 7/8 bolts that are on the vertical face. I made these washers 3/8 thick. After bolting up the crossbar I welded around the perimeter of the heavy washer bushings to reinforce that area of the cross bar. Once all the bolt were in and torqued I welded a 3/8 round bar across the pairs of bolts so they cannot come loose.Easy to remove if the need arises. Wish I had the picture thing worked out but I don't.