That's correct, I just went through our old paperwork and quotes from buying the
M59 new. The basic
M59 backhoe is either the BT1200/BT1200V. The 1200V has the thumb hydraulics installed at the factory. With the backhoe, you got the basic traditional backhoe & BT29xx series buckets with the pin-on connection. As an option, you could order the backhoe quick connect with the "open ear" type connector which was the BT4580 and cost an extra $648 at the time.
Buckets had to be ordered as either pin-on type or quick coupler type. I have no idea if the quick coupler can simply be added as a "pin-on" attachment to an
M59 that came as a pin on type. Seems like it should be. I'd like to know if anyone ever tried it.
The quick coupler buckets for the BT4580 were special. They were called the
BT45xx series Buckets (like having the "open ear" type of quick connection and cost an extra $100/per bucket.
Note that if you go to Messick's and try to find the BT4580 quick connector, they show it as a B86000 quick coupler (option). I've no idea why that is. The parts look to be identical to the BT4580. Anyone know the answer?
For the the M62s being sold now, they have one more optional coupler type as an option. So for the
M62 you can have the PIN-ON type, the BT4580 type quick connector for an extra $700, or the K7543 type quick connector for an extra $1000. The K7543 is the same quick coupler used on Kubota CE series Excavators. And of course it uses the buckets with the special ears that only fit the K7543 coupler.
The buckets themselves all seem to be identical except for the ears -which are either pin-on, BT4580 style ears, or K7543 style ears. Note that you can order just the ears and weld them onto whatever you want.
I have no idea whether that K7543 will fit onto the
M59 or not. It might. Anyone know?