Could you just put a quik coupler on your 158 loader. I thought a 725 was just a newr loader with about the same spec. We have 780  Great Bend loader on our 4430 with a JD joystick setup  that's works like a dream.  I would not have a farm  loader with out the joystick the Gb  loader will go really high . We had a 148 JD loader earlier on 4230 that did  not go as high. I really think a 158 loader is good setup.

Thanks, I'll look into the quick coupler add-ons.

I will look into the Sure Lock. That sounds good, thanks.

Thanks, I'll look into the Worksaver quick coupler as well.

148 and 158 loaders were the standard loaders for that tractor family. When MFWD tractors were coming the 260 and later 265 loaders provided the under boom room for larger front tires. The 200 series loaders were the first with a quick change attachment carrier and pin to tractor mounting brackets and featured mechanical self leveling. The introduction of the 7000 series tractors required wider loader boom spacing so the 720 and 725 replaced the 148 and 158 for all 2WD tractors and the 740 replaced the 265. Later on the 721 and 726 replaced the 720 and 725. All of the 600 and 700 series loader attachments will interchange. Mounting frames are different for loaders but remain compatible with in a given tractor family. A 4010 and 4455 share the same mount for a 725. A 4010 and a 4455 share the same mount for a 265. 200 series attachments do not fit 700 series loaders. There are after market buckets and attachments for all of these loaders. With an adapter plate a later 30 series or newer wide front under a 4010/20 and any of these loaders can easily be used. Deere does not sell a new loader to fit the early, pre 7000 tractors, but Koyker is building the 740 in their Legend series. Clear as mud?

That is a great summary, thanks.

Now that I think about it, you mentioned all 600 and 700 loader attachments interchange but I don't see anything in your summary about 600 series loaders. Where do they fit? Thanks.

The 620 and 640 fit 6000 series and earlier 4 cylinder utility tractors. The frames and loader booms make the "fit up" better on the shorter tractors. The only exception are the 6 cylinder utility tractors which have their own group of mounting frames that allow the row crop tractor loaders to fit.