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Faunsdale, AL | You may have frame rail bolts broken or loose. Have seen that on several 30 series with loaders. The loader mounts can cover up the special cone head (lug or wheel type) bolts that hold the frame rail to the transmission and engine castings. These special bolts are available from JD parts
If you do have broken bolts or wallowed out holes in the castings, your tractor had 5/8 coarse thread bolts but you can drill and tap to 3/4 coarse and use the bolts available for larger tractors like 5020/6030 etc. This may allow you to reuse the frame rail if it’s not wallowed out too much, or you may have to replace the frame rails with good used ones. Or you can use time-serts thread repairs or even helicoils though I’ve seen helicoils that didn’t stay put. Probably didn’t have the thing completely solid and once it started moving around, the helicoil wasn’t going to last.
A mag base drill is a very good tool to drill and repair those holes etc. if you have some holes/bolts that will still tighten up properly, you can set the mag drill up on the frame rail and drill through the wallowed out holes and tap for larger size bolts. If using a thread repair, you may want to use the new rail to make sure the damaged hole is centered perfectly and then take it off to tap after you get the holes drilled out. I would replace all the bolts, the head may be worn enough that it doesn’t engage the rail seat properly. Bolt might be stretched and fail under load later, so best to just replace them all. I would not hesitate to Loctite them in once you get everything repaired before you put loader mounts back on.
I can’t see why the frame rail being loose would affect the shifting because I think the front cab mount will be on the transmission case, but I haven’t looked at one in a while. It’s just the only thing that comes to mind when you say it screws up when you put a bale on it. Normally you can adjust linkage for marginally bad cab mounts.
Edited by ccjersey 12/1/2025 10:14
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4430 quad range hard shifting
